JP2012072565A

JP2012072565A - Railroad rail, rust-proofing processing method therefor, and fastening member

Info

Publication number: JP2012072565A
Application number: JP2010216397A
Authority: JP
Inventors: Shoichi Sekiya; 昌一関谷; Takeshi Tabuchi; 剛田淵
Original assignee: West Japan Railway Co
Current assignee: West Japan Railway Co
Priority date: 2010-09-28
Filing date: 2010-09-28
Publication date: 2012-04-12
Anticipated expiration: 2030-09-28
Also published as: JP5725497B2

Abstract

PROBLEM TO BE SOLVED: To provide a railroad rail with stabilized and improved corrosion resistance and electric corrosion resistance, in the railroad rail to be laid in an undersea tunnel, along a beach or in a connection track crossing or the like.SOLUTION: On an upper surface 4A and lower surface 4B of a bottom part 4, a spray coating film 2 comprising zinc and aluminum in the volume ratio of 40:60 to 50:50 is coated and formed.

Description

本発明は、鉄道用レール及びその防錆処理方法、及び、締結部材に関する。 The present invention relates to a railroad rail, a rustproofing method thereof, and a fastening member.

従来、鉄道用のレール鋼に金属を溶射し、トンネルや踏切、海岸沿いの地域等の腐食環境下でも腐食しにくい防食レールが提案されている（特許文献１参照）。 Conventionally, there has been proposed a corrosion-resistant rail which is sprayed with metal on rail steel for railways and hardly corrodes even in corrosive environments such as tunnels, railroad crossings and coastal areas (see Patent Document 1).

特開平７−６２５１５号公報JP-A-7-62515

しかし、従来の防食レールは、亜鉛−アルミニウム合金から成る線材を、ガス炎で溶融し、さらに溶融した合金に圧縮空気流を当てて細粒化し、溶融状態の液滴を加速して被溶射面に衝突堆積させて皮膜を形成する溶線式フレーム溶射にて防錆処理を行っていた。亜鉛−アルミニウム合金は、アルミニウムの含有量を体積比で１５％程度とするのが限度であり、従来の防食レールは、その亜鉛−アルミニウム合金の線材を溶射材料として用いるため、アルミニウムの含有率が低く、溶射皮膜の耐蝕性が十分でなかった。また、溶射皮膜が粗雑となって、水や酸素の透過を防止することができなかった。さらに、溶線式フレーム溶射は、ガス炎による溶融の熱量が高く、吹き付ける溶射材料の温度が非常に高温となるため、被溶射面が歪みを発生し、溶射皮膜が剥離して傷や割れ目を生じ易くなっていた。海底トンネルや地下トンネル等の腐食環境下で、鉄道用レールに傷や割れ目等から水分等が浸透すると発錆や腐食が発生し、レール寿命が短くなるという欠点があった。 However, conventional anti-corrosion rails melt a wire made of a zinc-aluminum alloy with a gas flame, further pulverize the molten alloy by applying a compressed air flow, accelerate the molten droplets, and spray the surface Rust prevention treatment was performed by hot wire flame spraying, in which a film was formed by impact deposition. The zinc-aluminum alloy has a limit of aluminum content of about 15% in volume ratio, and the conventional anticorrosion rail uses the zinc-aluminum alloy wire as the thermal spray material, so the aluminum content is low. The corrosion resistance of the thermal spray coating was low. Further, the sprayed coating becomes rough, and the permeation of water and oxygen cannot be prevented. In addition, in the flame-type flame spraying, the amount of heat of melting by the gas flame is high, and the temperature of the sprayed material to be sprayed becomes very high. It was easy. In a corrosive environment such as a submarine tunnel or an underground tunnel, if moisture penetrates into railroad rails from scratches or cracks, rusting or corrosion occurs, resulting in a short rail life.

そこで、本発明は、海底トンネルや海岸沿い、又は、連接軌道踏切等に敷設する鉄道用レール及び締結部材の耐腐食性を改善し、また、レールに確実に耐腐食性を付与できる防錆処理方法を提供することを目的とする。 Accordingly, the present invention improves the corrosion resistance of railroad rails and fastening members laid along a submarine tunnel, along the coastline, or on a connecting railroad crossing, and also provides anticorrosion treatment that can reliably impart corrosion resistance to the rails. It aims to provide a method.

本発明に係る鉄道用レールは、底部の上面及び下面に、亜鉛とアルミニウムとが４０：６０〜５０：５０の体積比で構成される溶射皮膜を被覆形成したものである。
また、上記溶射皮膜は、亜鉛部とアルミニウム部とが非層状態に堆積しているものである。
また、上記溶射皮膜が、低温アーク溶射によって形成されたものである。
また、上記溶射皮膜の平均膜厚寸法を、２００μｍ≦Ｔ≦５００μｍに設定しているものである。
また、上記溶射皮膜は、１００ｇ／ｍ^２〜２４０ｇ／ｍ^２の無機質系封孔剤にて封孔処理されているものである。
また、上記溶射皮膜は、母材レール鋼の表面をブラスト処理によって粗面形成して平均表面粗さを５０μｍ以上とした被溶射面部上に形成されているものである。
また、上記底部を締結部材によって枕木に固着した使用状態下で、上記締結部材の押圧部が接触する上記底部の上面に於て、上記溶射皮膜の膜厚寸法を、５００μｍ〜２０００μｍに局部的に厚く形成して、締結用の被押圧部を設けたものである。 The rail for rails according to the present invention is obtained by coating a thermal spray coating composed of zinc and aluminum in a volume ratio of 40:60 to 50:50 on the upper and lower surfaces of the bottom.
Moreover, the said sprayed coating is what the zinc part and the aluminum part have accumulated in the non-layered state.
Further, the sprayed coating is formed by low temperature arc spraying.
The average film thickness dimension of the thermal spray coating is set to 200 μm ≦ T ≦ 500 μm.
Also, the thermal spray ^coating, are those sealing treatment at 100g / ^{m 2} ~240g / m 2 of mineral-based sealing agent.
The sprayed coating is formed on the surface to be sprayed so that the surface of the base rail steel is roughened by blasting to have an average surface roughness of 50 μm or more.
In addition, the film thickness dimension of the sprayed coating is locally 500 μm to 2000 μm on the upper surface of the bottom part in contact with the pressing part of the fastening member in a use state where the bottom part is fixed to a sleeper with a fastening member. It is formed thick and provided with a pressed portion for fastening.

また、本発明に係る鉄道用レール防錆処理方法は、母材レール鋼の表面を粗面形成して被溶射面部を形成し、亜鉛線材とアルミニウム線材の間でアーク放電を発生させて該亜鉛線材とアルミニウム線材とを同時に溶融し、その後方から圧縮空気を噴射して亜鉛微細粒とアルミニウム微細粒とし、該亜鉛微細粒とアルミニウム微細粒とを４０：６０〜５０：５０の体積比で上記被溶射面部に吹き付け、上記亜鉛部とアルミニウム部とが非層状態に堆積する溶射皮膜を成膜する方法である。
また、上記亜鉛微細粒及びアルミニウム微細粒を、上記被溶射面部に吹き付けて到達する直前の温度を４０℃〜８０℃としたものである。
また、上記母材レール鋼の頭部を養生部材で被覆し、上記母材レール鋼の底部の下面が上方になるように上下逆さまに倒立させた状態とし、上記母材レール鋼の底部の全面にわたって、上記被溶射面部を形成して成膜する方法である。 Also, the rail rust prevention treatment method for railroad according to the present invention includes forming a surface to be sprayed by roughening the surface of the base material rail steel, generating arc discharge between the zinc wire and the aluminum wire, and generating the zinc. A wire and an aluminum wire are melted at the same time, and compressed air is sprayed from behind to form zinc fine particles and aluminum fine particles. The zinc fine particles and the aluminum fine particles are mixed in a volume ratio of 40:60 to 50:50. In this method, a sprayed coating is sprayed onto the surface to be sprayed to deposit the zinc part and the aluminum part in a non-layered state.
Moreover, the temperature immediately before the zinc fine particles and aluminum fine particles are sprayed onto the sprayed surface portion to reach 40 to 80 ° C.
In addition, the head portion of the base material rail steel is covered with a curing member, and is turned upside down so that the lower surface of the bottom portion of the base material rail steel is upward. This is a method for forming a film by forming the sprayed surface portion.

また、本発明に係る締結部材は、低温アーク溶射によって、亜鉛とアルミニウムとが４０：６０〜５０：５０の体積比で構成される溶射皮膜部が被覆されているものである。
また、上記溶射皮膜部が、上記締結部材３の表面の全体に一定の膜厚寸法をもって均一に被覆形成されているものである。 Moreover, the fastening member which concerns on this invention is coat | covered with the low-temperature arc spraying, the sprayed-coating part comprised by the volume ratio of 40: 60-50: 50 of zinc and aluminum.
Further, the sprayed coating portion is uniformly coated with a certain film thickness on the entire surface of the fastening member 3.

本発明の鉄道用レールによれば、密着性に優れた緻密な溶射皮膜を強固に形成することができる。よって、確実に底部の腐食を防止でき、海水に触れたり、あるいは、迷走電流が流れるような厳しい腐食環境下で、長期間使用することができる。 According to the railway rail of the present invention, a dense sprayed coating excellent in adhesion can be formed firmly. Therefore, corrosion of the bottom portion can be surely prevented, and it can be used for a long time in a severe corrosive environment where seawater is touched or stray current flows.

本発明の鉄道用レール防錆処理方法によれば、母材レール鋼への密着性に優れた緻密な溶射皮膜を強固に形成することができる。よって、母材レール鋼の表面に確実に防錆処理を施し、海水に触れたり、あるいは、迷走電流が流れるような厳しい腐食環境下で、長期間使用することができる。 According to the rail rust prevention treatment method of the present invention, it is possible to firmly form a dense sprayed coating excellent in adhesion to the base material rail steel. Therefore, the surface of the base material rail steel is reliably subjected to rust prevention treatment, and can be used for a long time in a severe corrosive environment where seawater is touched or stray current flows.

本発明の締結部材によれば、密着性に優れた緻密な溶射皮膜部を強固に形成することができる。よって、確実に腐食を防止でき、海水に触れたり、あるいは、迷走電流が流れるような厳しい腐食環境下で、長期間使用することができる。 According to the fastening member of the present invention, it is possible to firmly form a dense sprayed coating portion having excellent adhesion. Therefore, corrosion can be reliably prevented, and it can be used for a long time in a severe corrosive environment where seawater is touched or stray current flows.

本発明の鉄道用レールの実施の一形態を示した断面正面図である。It is a section front view showing one embodiment of a rail for rails of the present invention. 図１のＸ部拡大図である。It is the X section enlarged view of FIG. 図１のＹ部拡大図である。It is the Y section enlarged view of FIG. 鉄道用レール及び締結部材の使用状態を示した断面正面図である。It is the cross-sectional front view which showed the use condition of the rail for railroads, and a fastening member. 鉄道用レール及び締結部材の使用状態を示した平面図である。It is the top view which showed the use condition of the rail for railroads, and a fastening member. 鉄道用レールのブラスト処理工程を示した断面正面図である。It is the cross-sectional front view which showed the blasting process of the rail for railroads. 鉄道用レールの防錆処理工程を示した断面正面図である。It is the cross-sectional front view which showed the antirust process of the rail for railroads. 金属溶射手段の一例を示した簡略図である。It is the simple figure which showed an example of the metal spraying means. 鉄道用レールの封孔処理工程を示した断面正面図である。It is the cross-sectional front view which showed the sealing process process of the rail for railroads. 他の締結部材を示した断面正面図である。It is the cross-sectional front view which showed the other fastening member.

以下、図面に基づき本発明を詳説する。
図１は、本発明の実施の一形態を示したものであり、鉄道用レール本体Ｒは、海底トンネルや海岸沿い、又は、連接軌道踏切等に敷設することを想定して作製され、母材レール鋼１が海水の塩害による腐食や電食に耐えられるように防錆処理が施されている。
本発明の鉄道用レール本体Ｒは、底部４の上面４Ａ及び下面４Ｂに、亜鉛とアルミニウムとが４０：６０〜５０：５０の体積比で構成される溶射皮膜２を被覆形成している。溶射皮膜２は、鉄道用レール本体Ｒの底部４の下面４Ｂから腹部６にわたる表面に被覆形成されている。(なお、本発明に於て、上記底部４を底壁部と呼ぶこともある。）
対象となる母材レール鋼１は、３０ｋｇレール、３７ｋｇレール、４０ｋｇＮレール、５０ｋｇＮレール、及び、６０ｋｇレール等が適用され、化学成分が、Ｃ：０．５％〜０．７５％、Ｓｉ：０．１５％〜０．３５％、Ｍｎ：０．６０％〜１．１０％、Ｐ：０．０４５％以下、Ｓ：０．０５０％以下の鋼鉄製であって、機械的性質が、引張強さ：６９０Ｎ／ｍｍ^２以上、伸び９％以上、硬さ２３５ＨＢ以上のものが用いられる。 Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an embodiment of the present invention. A rail body R for a rail is produced on the assumption that it is laid on a submarine tunnel, along a coast, or on a connecting railroad crossing. Rust prevention treatment is performed so that the rail steel 1 can withstand corrosion and electric corrosion caused by salt damage of seawater.
In the rail body R for railroad of the present invention, the thermal spray coating 2 composed of zinc and aluminum in a volume ratio of 40:60 to 50:50 is formed on the upper surface 4A and the lower surface 4B of the bottom portion 4 by coating. The thermal spray coating 2 is formed on the surface extending from the lower surface 4 </ b> B of the bottom 4 of the rail main body R to the abdomen 6. (In the present invention, the bottom portion 4 is sometimes referred to as a bottom wall portion.)
As the target base material rail steel 1, 30 kg rail, 37 kg rail, 40 kg N rail, 50 kg N rail, 60 kg rail and the like are applied, and the chemical components are C: 0.5% to 0.75%, Si: 0 .15% to 0.35%, Mn: 0.60% to 1.10%, P: 0.045% or less, S: 0.050% or less, the mechanical properties are tensile strength Length: 690 N / mm ² or more, elongation of 9% or more, hardness of 235 HB or more is used.

図２と図３に示すように、溶射皮膜２は、亜鉛部２１とアルミニウム部２２とが非層状態に堆積している。言い換えると、溶射皮膜２は、亜鉛とアルミニウムが不均一に積み重なった状態であり、断面視で亜鉛とアルミニウムが不均等に分布している。つまり、擬合金皮膜と呼ばれるものである。
溶射皮膜２は、母材レール鋼１の表面をブラスト処理によって粗面形成して平均表面粗さＲ_Ｚを５０μｍ以上とした被溶射面部１５上に形成されている。被溶射面部１５は、溶射皮膜２が被覆形成される母材レール鋼１の底部１０及び腹部１１の表面に形成されている。
溶射皮膜２は、その表面から被溶射面部１５までの膜厚寸法Ｔ_１を、所定の複数箇所で計測し平均した数値を平均膜厚寸法Ｔとし、その平均膜厚寸法Ｔを、２００μｍ≦Ｔ≦５００μｍに設定している。溶射皮膜２は、局部的に厚く形成して、最大で２０００μｍ程度の膜厚寸法Ｔ_ＭＡＸに形成することも可能である。
溶射皮膜２は、１００ｇ／ｍ^２〜２４０ｇ／ｍ^２の無機質系封孔剤にて封孔処理されている。具体的には、無機質系封孔剤として、「ケイソルＧＳガード」（中国塗装株式会社製）が用いられる。 As shown in FIGS. 2 and 3, the sprayed coating 2 has a zinc portion 21 and an aluminum portion 22 deposited in a non-layered state. In other words, the thermal spray coating 2 is a state in which zinc and aluminum are stacked non-uniformly, and zinc and aluminum are unevenly distributed in a cross-sectional view. That is, it is called a pseudo alloy film.
The sprayed coating 2 is formed on the sprayed surface portion 15 in which the surface of the base rail steel 1 is roughened by blasting to have an average surface roughness _RZ of 50 μm or more. The sprayed surface portion 15 is formed on the surface of the bottom 10 and the abdomen 11 of the base material rail steel 1 on which the sprayed coating 2 is formed.
The thermal spray coating 2 has a film thickness dimension T ₁ from the surface thereof to the sprayed surface portion 15 measured at a plurality of predetermined locations and averaged, and the average film thickness dimension T is defined as 200 μm ≦ T. ≦ 500 μm is set. The thermal spray coating 2 can be formed to be thick locally and to have a maximum film thickness dimension T _{MAX of} about 2000 μm.
Sprayed coating 2 ^is sealing treatment at 100g / ^{m 2} ~240g / m 2 of mineral-based sealing agent. Specifically, “Kaysol GS guard” (manufactured by China Painting Co., Ltd.) is used as the inorganic sealing agent.

上述のように、鉄道用レール本体Ｒに溶射皮膜２を被覆形成する方法として、低温アーク溶射法がある。
図６〜図９に基づいて、その具体的形態を説明すると、まず、図６に示すように、母材レール鋼１の頭部１２を、ガムテープ等の養生部材１４で被覆し、母材レール鋼１の底部１０の下面１０Ｂが上方になるように上下逆さまに倒立させた状態とし、母材レール鋼１の底部１０及び腹部１１の全面にわたってブラスト処理を行って、被溶射面部１５を形成する。この工程を、ブラスト処理工程とし、除錆度：（ＪＩＳ）Ｓａ＝２．５以上、粗さ：（ＪＩＳ）Ｒ_Ｚ＝４５μｍ以上の処理グレードを備えるステンレススラグから成る研磨材が用いられる。研磨材の処理グレードがこれより低いと、母材レール鋼１の表面硬度が高いため、十分に粗面形成できない虞れがある。 As described above, there is a low-temperature arc spraying method as a method of coating the thermal spray coating 2 on the rail body R for rail.
The specific form will be described based on FIG. 6 to FIG. 9. First, as shown in FIG. 6, the head 12 of the base material rail steel 1 is covered with a curing member 14 such as gum tape, and the base material rail. The bottom surface 10B of the bottom portion 10 of the steel 1 is turned upside down so that the bottom surface 10B is upward, and the entire surface of the bottom portion 10 and the abdomen 11 of the base material rail steel 1 is subjected to blasting to form the sprayed surface portion 15. . This process is a blasting process, and an abrasive made of stainless slag having a processing grade of rust removal degree: (JIS) Sa = 2.5 or more and roughness: (JIS) R _Z = 45 μm or more is used. If the processing grade of the abrasive is lower than this, the surface hardness of the base material rail steel 1 is high, so that there is a possibility that a sufficiently rough surface cannot be formed.

次に、図７と図８に示すように、防錆処理工程として、母材レール鋼１の表面に溶射皮膜２を形成する。この防錆処理工程は、金属溶射手段７を用いて低温アーク溶射法によって行われる。
金属溶射手段７にて、亜鉛線材Ｚとアルミニウム線材Ａの間でアーク放電を発生させて亜鉛線材Ｚとアルミニウム線材Ａとを同時に溶融し、その後方から圧縮空気を噴射して亜鉛微細粒２３とアルミニウム微細粒２４とする。溶融した亜鉛微細粒２３とアルミニウム微細粒２４とを、４０：６０〜５０：５０の体積比で被溶射面部１５に吹き付ける。
そして、母材レール鋼１の被溶射面部１５上で、亜鉛微細粒２３とアルミニウム微細粒２４とを固化し、図２と図３に示すような、亜鉛部２１とアルミニウム部２２とが非層状態に堆積する溶射皮膜２を成膜する。
また、金属溶射手段７は、アーク放電によって溶融した亜鉛とアルミニウムの外周を囲むようにして、環状噴射口７Ａから噴射した圧縮空気により低気圧気流圏で、亜鉛微細粒２３及びアルミニウム微細粒２４を形成し、被溶射面部１５に吹き付けて到達する直前の温度を４０℃〜８０℃として、被溶射面部１５の温度が異常上昇しないように溶射を行なう。より好ましくは、亜鉛微細粒２３及びアルミニウム微細粒２４が被溶射面部１５に当たる直前の温度は、５０℃以下とするのが良い。このようにして、溶射皮膜２が、低温アーク溶射にて成膜される。 Next, as shown in FIGS. 7 and 8, as a rust-proofing process, a thermal spray coating 2 is formed on the surface of the base material rail steel 1. This rust prevention treatment step is performed by a low temperature arc spraying method using the metal spraying means 7.
In the metal spraying means 7, an arc discharge is generated between the zinc wire Z and the aluminum wire A to melt the zinc wire Z and the aluminum wire A at the same time. The aluminum fine particles 24 are used. The molten zinc fine particles 23 and aluminum fine particles 24 are sprayed onto the sprayed surface portion 15 at a volume ratio of 40:60 to 50:50.
Then, the zinc fine particles 23 and the aluminum fine particles 24 are solidified on the sprayed surface portion 15 of the base rail steel 1, and the zinc portion 21 and the aluminum portion 22 as shown in FIGS. 2 and 3 are non-layered. The thermal spray coating 2 deposited in the state is formed.
The metal spraying means 7 forms zinc fine particles 23 and aluminum fine particles 24 in a low-pressure airflow sphere by compressed air injected from the annular injection port 7A so as to surround the outer periphery of zinc and aluminum melted by arc discharge. The temperature immediately before reaching the sprayed surface portion 15 is 40 ° C. to 80 ° C., and spraying is performed so that the temperature of the sprayed surface portion 15 does not rise abnormally. More preferably, the temperature immediately before the zinc fine particles 23 and the aluminum fine particles 24 hit the sprayed surface portion 15 is preferably 50 ° C. or less. Thus, the thermal spray coating 2 is formed by low temperature arc spraying.

次に、図９に示すように、封孔処理工程として、溶射皮膜２の表面に、１００ｇ／ｍ^２〜２４０ｇ／ｍ^２の無機質系封孔剤を、スプレーにて噴霧、又は、刷毛にて塗布する。封孔剤は、溶射皮膜２中の微細孔に浸透して隙間を塞ぎ、その後固化して水やガスの浸入を防止する。 Next, as shown in FIG. 9, as a sealing treatment step, 100 g / m ^{2 to} 240 g / m ^{2 of} an inorganic sealing agent is sprayed on the surface of the sprayed coating 2 by spray or by brush. Apply. The sealing agent penetrates into the micropores in the thermal spray coating 2 to close the gap, and then solidifies to prevent water and gas from entering.

図１、図３、及び、図４、図５、図１０に示すように、本発明のレール本体Ｒは、底部（底壁部）４を締結部材３，３によって枕木（まくらぎ）Ｍに固着した使用状態下で、締結部材３，３の押圧部３０，３０が接触する底部（底壁部）４の上面４Ａに於て、溶射皮膜２の膜厚寸法Ｔ_２を、５００μｍ〜２０００μｍに局部的に厚く形成して、締結用の被押圧部２０，２０を設けている。より好ましくは、被押圧部２０の膜厚寸法Ｔ_２を、５００μｍ〜１２００μｍに設定するのが良い。
レール本体Ｒは、合成ゴムから成る軌道パッド８を介して枕木Ｍに載置され、長手方向の所定間隔毎に配設された締結部材３，３により底部４の上面４Ａを押圧されて枕木Ｍに固定される。レール本体Ｒは、締結部材３の押圧部３０が底部４の上面４Ａに接触する位置を予め把握し、損耗し易い被押圧部２０の膜厚寸法Ｔ_２を局部的に厚くして、溶射皮膜２が摩擦により薄くなって食孔が形成されるの防止している。なお、締結部材３の押圧部３０が接触する以外に、母材レール鋼１に電流を流すことで電食が発生し易い部位の溶射皮膜２を、局部的に厚く形成しておくことも望ましい。 As shown in FIGS. 1, 3, 4, 5, and 10, the rail body R of the present invention has a bottom portion (bottom wall portion) 4 that is connected to a sleeper M by fastening members 3 and 3. The film thickness dimension T2 of the thermal spray coating ₂ is set to 500 μm to 2000 μm on the upper surface 4A of the bottom part (bottom wall part) 4 with which the pressing parts 30 and 30 of the fastening members 3 and 3 are in contact with each other under the fixed use condition. The pressed parts 20 and 20 for fastening are provided so as to be thick locally. More preferably, the thickness dimension _{T 2} of the pressed portion 20, may be set to 500Myuemu～1200myuemu.
The rail body R is placed on the sleeper M via a track pad 8 made of synthetic rubber, and the upper surface 4A of the bottom 4 is pressed by the fastening members 3 and 3 arranged at predetermined intervals in the longitudinal direction. Fixed to. Rail body R is grasped in advance the position where the pressing portion 30 of the fastening member 3 is brought into contact with the upper surface 4A of the bottom portion 4, the thickness dimension T ₂ of the wear easily pressed portion 20 and locally thick, thermal spray coating 2 is thinned by friction to prevent formation of pits. In addition to the contact of the pressing portion 30 of the fastening member 3, it is also desirable to locally form the sprayed coating 2 at a site where electric corrosion is likely to occur by passing an electric current through the base material rail steel 1. .

図４、図５に示すように、締結部材３は、材料が（ＪＩＳ）Ｇ４８０１のＳＵＰ９から成り、線ばね状に形成されている。締結部材３は、枕木Ｍに固着される固着部材９の取付孔９Ａに一端の挿入部３３を挿入し、かつ、他端の押圧部３０を、約１２．５ｋＮの弾発付勢力Ｆをもって底部４の上面４Ａに押し付けている。
また、図１０に示すように、締結部材３は、（ＪＩＳ）Ｅ１１１８で規定するような板バネ状とするも好ましい。締結部材３，３は、それぞれボルトによって枕木Ｍに固着され、弾発付勢力Ｆをもって底部４の上面４Ａに押し付ける押圧部３０，３０を有する。 As shown in FIGS. 4 and 5, the fastening member 3 is made of a SUP 9 made of (JIS) G4801, and is formed in a wire spring shape. The fastening member 3 has an insertion portion 33 at one end inserted into the mounting hole 9A of the fixing member 9 fixed to the sleeper M, and the pressing portion 30 at the other end has a bottom portion with a resilient urging force F of about 12.5 kN. 4 is pressed against the upper surface 4A.
Moreover, as shown in FIG. 10, it is also preferable that the fastening member 3 has a leaf spring shape as defined by (JIS) E1118. The fastening members 3, 3 are respectively fixed to the sleepers M by bolts, and have pressing portions 30, 30 that are pressed against the upper surface 4 </ b> A of the bottom portion 4 with an elastic biasing force F.

締結部材３は、低温アーク溶射によって、亜鉛とアルミニウムとが４０：６０〜５０：５０の体積比で構成される溶射皮膜部３２が被覆されている。
溶射皮膜部３２は、締結部材３の表面の全体に一定の膜厚寸法Ｔ_３をもって均一に被覆形成されている。溶射皮膜部３２は、図２と同様に、亜鉛部２１とアルミニウム部２２とが非層状態に堆積する擬合金皮膜である。溶射皮膜部３２は、平均表面粗さＲ_Ｚを５０μｍ以上に粗面形成した被溶射面上に形成され、膜厚寸法Ｔ_３を２００μｍ〜５００μｍの範囲内で一定としている。溶射皮膜部３２は、１００ｇ／ｍ^２〜２４０ｇ／ｍ^２の無機質系封孔剤にて封孔処理されている。 The fastening member 3 is coated with a sprayed coating portion 32 composed of zinc and aluminum in a volume ratio of 40:60 to 50:50 by low temperature arc spraying.
Thermal spray coating unit 32 is uniformly coated form with a predetermined thickness dimension T ₃ on the entire surface of the fastening member 3. The thermal spray coating portion 32 is a pseudoalloy coating in which the zinc portion 21 and the aluminum portion 22 are deposited in a non-layered state, as in FIG. Thermal spray coating portion 32 is formed a mean surface roughness _{R Z} onto the spray coat surface was rough formed above 50 [mu] m, has a constant thickness dimension _{T 3} within the 200Myuemu～500myuemu. Thermal spray coating unit 32 ^is sealing treatment at 100g / ^{m 2} ~240g / m 2 of mineral-based sealing agent.

上述した本発明の鉄道用レール及び締結部材の使用方法（作用）について説明する。
本発明の鉄道用レールに於て、溶射皮膜２は、低温アーク溶射によって形成された擬合金皮膜であるため、被溶射面部１５の歪みによる剥離を生じることなく母材レール鋼１に密着する。溶射皮膜２は、アルミニウム部２２の表面に酸化皮膜（Ａｌ_２Ｏ_３）を形成し、緻密であり、かつ、水や酸素を透過しにくく、しかも、耐蝕性に優れている。また、溶射皮膜２は、亜鉛部２１が鉄よりもイオン化し易いため、母材レール鋼１が腐食するのを防止する。亜鉛部２１が放出した電子が介在して、水と酸素が反応し、水酸化イオンを生じ、亜鉛イオンと水酸化イオンが反応すると、水酸化亜鉛から成る白錆が発生する。アルミニウム部２２の酸化皮膜は、亜鉛部２１を被覆し、過度にイオン化して溶出することを防止すると共に、水・酸素の透過を抑制し、防錆作用を長期にわたって適正に保持する。このように、溶射皮膜２は、母材レール鋼１に対して電気科学的な防食・防錆作用を長期にわたって発揮する。
従って、鉄道用レール本体Ｒは、海底トンネルや海岸沿い、又は、連接軌道踏切等に敷設する場合であっても、海水による塩害や電食に耐え、従来工法以上の長期間にわたって使用することが可能である。 The use method (action | operation) of the rail for rails of this invention mentioned above and a fastening member is demonstrated.
In the rail for rails of the present invention, the sprayed coating 2 is a pseudoalloy coating formed by low-temperature arc spraying, and therefore adheres closely to the base material rail steel 1 without causing peeling due to distortion of the sprayed surface portion 15. The thermal spray coating 2 forms an oxide coating (Al ₂ O ₃ ) on the surface of the aluminum portion 22, is dense, hardly permeates water and oxygen, and is excellent in corrosion resistance. Further, the spray coating 2 prevents the base material rail steel 1 from being corroded because the zinc portion 21 is more easily ionized than iron. When electrons emitted from the zinc portion 21 are present, water and oxygen react to generate hydroxide ions, and when zinc ions and hydroxide ions react, white rust composed of zinc hydroxide is generated. The oxide film of the aluminum part 22 covers the zinc part 21, prevents excessive ionization and elution, suppresses permeation of water and oxygen, and appropriately maintains the rust preventive action for a long time. Thus, the thermal spray coating 2 exhibits an electrochemical anticorrosion and rust prevention action for the base material rail steel 1 over a long period of time.
Therefore, the rail body R for railroads can withstand salt damage and electric corrosion caused by seawater and can be used for a longer period of time than conventional methods, even when it is laid along a submarine tunnel, along the coast, or at a railroad crossing. Is possible.

また、鉄道用レール本体Ｒは、水・海水に接触し易い底部４の上面４Ａ及び下面４Ｂを、溶射皮膜２によって被覆し、腐食によるレール寿命の短命化を抑制する。鉄道用レール本体Ｒは、ブラスト処理工程から封孔処理工程に至る加工段階で、上下逆さまとして倒立させるため、溶射皮膜２が底部４の下面４Ｂに正確に成膜される。つまり、レール本体Ｒの防錆を行なう上で、最も重要な底部４の下面４Ｂに、確実かつ均整を保って溶射皮膜２が形成される。
しかも、底部４の上面４Ａに於て、締結部材３の押圧部３０が接触する部位、又は、電食発生部位で、溶射皮膜２の膜厚寸法Ｔ_２を局部的に厚くして、溶射皮膜２が損耗して発錆・腐食を生じるのを確実に防止する。 Moreover, the rail main body R for railroads covers the upper surface 4A and the lower surface 4B of the bottom portion 4 that is easily in contact with water and seawater with the thermal spray coating 2, and suppresses shortening of the rail life due to corrosion. The rail body R for railroads is inverted upside down at the processing stage from the blasting process to the sealing process, so that the sprayed coating 2 is accurately formed on the lower surface 4B of the bottom part 4. That is, in performing the rust prevention of the rail body R, the sprayed coating 2 is formed on the lower surface 4B of the bottom portion 4 which is the most important and surely and uniformly maintained.
In addition, on the upper surface 4A of the bottom portion 4, the film thickness dimension T2 of the thermal spray coating ₂ is locally increased at the portion where the pressing portion 30 of the fastening member 3 contacts or the portion where galvanic corrosion occurs. 2 is surely prevented from rusting and corrosion due to wear.

また、本発明の締結部材３に於て、溶射皮膜部３２は、低温アーク溶射によって形成された擬合金皮膜であり、電気科学的な防食・防錆作用を長期にわたって発揮する。
使用状態下で、締結部材３は、非常に大きな弾発付勢力Ｆをレール本体Ｒの底部４に常時付与する。よって、締結部材３には、弾発付勢力Ｆを生みだすための内部ひずみが生じる。締結部材３は、内部ひずみに対する応力を、全体で均等に分散して負担する。溶射皮膜部３２は、締結部材３の表面の全体を、一定の膜厚寸法Ｔ_３をもって均一に被覆し、締結部材３内部の応力のバランスを崩すことなく形成される。
従って、締結部材３は、海底トンネルや海岸沿い、又は、連接軌道踏切等に敷設する鉄道用レールの固定に用いる場合であっても、海水による塩害や電食に耐え、従来工法以上の長期間にわたって使用することが可能である。 In the fastening member 3 of the present invention, the thermal spray coating 32 is a pseudo-alloy coating formed by low-temperature arc spraying, and exhibits an electrochemical anticorrosion and rust prevention effect over a long period of time.
The fastening member 3 always applies a very large elastic biasing force F to the bottom portion 4 of the rail body R under use. Therefore, the fastening member 3 is subjected to internal strain for generating the elastic urging force F. The fastening member 3 bears the stress with respect to the internal strain evenly distributed as a whole. Thermal spray coating unit 32, the entire surface of the fastening member 3 was uniformly coated with a predetermined thickness dimension T _3, it is formed without breaking the balance of the fastening member 3 internal stress.
Therefore, the fastening member 3 is resistant to salt damage and electric corrosion caused by seawater, even when used for fixing railroad rails laid along a submarine tunnel, along the coastline, or at a connecting railroad crossing. Can be used over a wide range.

以上のように、本発明に係る鉄道用レールは、底部４の上面４Ａ及び下面４Ｂに、亜鉛とアルミニウムとが４０：６０〜５０：５０の体積比で構成される溶射皮膜２を被覆形成したので、溶射皮膜２の密着性が良く、十分に厚く被覆でき、かつ、緻密な溶射皮膜２を強固に形成することができる。よって、確実に底部４の腐食を防止でき、海水に触れたり、あるいは、迷走電流が流れるような厳しい腐食環境下で、長期間使用することができる。 As described above, in the rail for rail according to the present invention, the thermal spray coating 2 composed of zinc and aluminum in a volume ratio of 40:60 to 50:50 is formed on the upper surface 4A and the lower surface 4B of the bottom portion 4 by coating. Therefore, the adhesion of the thermal spray coating 2 is good, the coating can be sufficiently thick, and the dense thermal spray coating 2 can be formed firmly. Therefore, corrosion of the bottom part 4 can be reliably prevented, and it can be used for a long time in a severe corrosive environment where seawater is touched or stray current flows.

また、溶射皮膜２は、亜鉛部２１とアルミニウム部２２とが非層状態に堆積しているので、電気科学的な防食・防錆作用を長期にわたって発揮できる。 Moreover, since the zinc part 21 and the aluminum part 22 have accumulated in the non-layered state, the sprayed coating 2 can exhibit an electrochemical anticorrosion and rust prevention action over a long period of time.

また、溶射皮膜２が、低温アーク溶射によって形成されたので、溶射皮膜２が剥離による割れ目や傷を生じることなく、確実に防錆できる。 Further, since the thermal spray coating 2 is formed by low-temperature arc thermal spraying, the thermal spray coating 2 can reliably prevent rust without causing cracks or scratches due to peeling.

また、溶射皮膜２の平均膜厚寸法Ｔを、２００μｍ≦Ｔ≦５００μｍに設定しているので、防食・防錆作用を長期にわたって発揮できる。 Moreover, since the average film thickness dimension T of the thermal spray coating 2 is set to 200 μm ≦ T ≦ 500 μm, the anticorrosion / rust prevention action can be exhibited over a long period of time.

また、溶射皮膜２は、１００ｇ／ｍ^２〜２４０ｇ／ｍ^２の無機質系封孔剤にて封孔処理されているので、水やガスの浸入を確実に防止でき、防食・防錆作用を長期にわたって発揮できる。 Also, the thermal spray coating 2, because they are sealing treatment at 100g ^/ m ² ~240g / m 2 of mineral-based sealing agent, the penetration of water and gas can be reliably prevented, long-term corrosion-rust effect It can be demonstrated over.

また、溶射皮膜２は、母材レール鋼１の表面をブラスト処理によって粗面形成して平均表面粗さＲ_Ｚを５０μｍ以上とした被溶射面部１５上に形成されているので、溶射皮膜２が母材レール鋼１に確実に密着し、防食・防錆作用を長期にわたって発揮できる。 Further, since the sprayed coating 2 is formed on the sprayed surface portion 15 having a rough surface formed by blasting the surface of the base rail steel 1 and having an average surface roughness _RZ of 50 μm or more, the sprayed coating 2 is formed. It adheres firmly to the base metal rail steel 1 and can exhibit anti-corrosion and anti-rust effects for a long time.

また、底部４を締結部材３，３によって枕木Ｍに固着した使用状態下で、締結部材３，３の押圧部３０，３０が接触する底部４の上面４Ａに於て、溶射皮膜２の膜厚寸法Ｔ_２を、５００μｍ〜２０００μｍに局部的に厚く形成して、締結用の被押圧部２０，２０を設けたので、溶射皮膜２が損耗して発錆・腐食を生じるのを防止でき、防食・防錆作用を長期にわたって発揮できる。 Further, the film thickness of the thermal spray coating 2 is formed on the upper surface 4A of the bottom portion 4 where the pressing portions 30 and 30 of the fastening members 3 and 3 come into contact with each other in a use state where the bottom portion 4 is fixed to the sleepers M by the fastening members 3 and 3 Since the dimension T ₂ is locally thickly formed to 500 μm to 2000 μm and the pressed portions 20 and 20 for fastening are provided, the sprayed coating 2 can be prevented from being worn and rusting / corrosion can be prevented.・ It can exhibit anti-rust effect for a long time.

また、本発明に係る鉄道用レール防錆処理方法は、母材レール鋼１の表面を粗面形成して被溶射面部１５を形成し、亜鉛線材Ｚとアルミニウム線材Ａの間でアーク放電を発生させて亜鉛線材Ｚとアルミニウム線材Ａとを同時に溶融し、その後方から圧縮空気を噴射して亜鉛微細粒２３とアルミニウム微細粒２４とし、亜鉛微細粒２３とアルミニウム微細粒２４とを４０：６０〜５０：５０の体積比で被溶射面部１５に吹き付け、亜鉛部２１とアルミニウム部２２とが非層状態に堆積する溶射皮膜２を成膜するので、母材レール鋼１への密着性に優れた緻密な溶射皮膜２を強固に形成することができる。よって、母材レール鋼１の表面に確実に防錆処理を施し、海水に触れたり、あるいは、迷走電流が流れるような厳しい腐食環境下で、長期間使用することができる。また、電気科学的な防食・防錆作用を長期にわたって発揮できる。 In addition, the rail anti-rust treatment method for railroad according to the present invention forms a sprayed surface portion 15 by roughing the surface of the base rail steel 1, and generates an arc discharge between the zinc wire Z and the aluminum wire A. The zinc wire Z and the aluminum wire A are melted at the same time, and compressed air is sprayed from the rear to form the zinc fine particles 23 and the aluminum fine particles 24. The zinc fine particles 23 and the aluminum fine particles 24 are converted into 40: 60- The sprayed surface portion 15 is sprayed at a volume ratio of 50:50 to form the sprayed coating 2 in which the zinc portion 21 and the aluminum portion 22 are deposited in a non-layered state, so that the adhesion to the base material rail steel 1 is excellent. The dense sprayed coating 2 can be formed firmly. Therefore, the surface of the base material rail steel 1 can be reliably subjected to rust prevention treatment, and can be used for a long time in a severe corrosive environment in which seawater is touched or stray current flows. In addition, it can exhibit anti-corrosion and rust prevention action for a long time.

また、亜鉛微細粒２３及びアルミニウム微細粒２４を、被溶射面部１５に吹き付けて到達する直前の温度を４０℃〜８０℃としたので、溶射皮膜２が剥離による割れ目や傷を生じることなく、確実に防錆できる。 In addition, since the temperature immediately before the zinc fine particles 23 and the aluminum fine particles 24 are sprayed onto the sprayed surface portion 15 is set to 40 ° C. to 80 ° C., the sprayed coating 2 is surely free from cracks and scratches due to peeling. Can be rust-proof.

また、母材レール鋼１の頭部１２を養生部材１４で被覆し、母材レール鋼１の底部１０の下面１０Ｂが上方になるように上下逆さまに倒立させた状態とし、母材レール鋼１の底部１０の全面にわたって、被溶射面部１５を形成して成膜するので、溶射皮膜２が底部４の下面４Ｂに均一かつ正確に被覆形成できる。 Further, the head 12 of the base material rail steel 1 is covered with the curing member 14, and the base material rail steel 1 is turned upside down so that the lower surface 10B of the bottom 10 of the base material rail steel 1 is upward. Since the sprayed surface portion 15 is formed over the entire surface of the bottom portion 10, the sprayed coating 2 can be uniformly and accurately coated on the lower surface 4 </ b> B of the bottom portion 4.

また、本発明の締結部材は、低温アーク溶射によって、亜鉛とアルミニウムとが４０：６０〜５０：５０の体積比で構成される溶射皮膜部３２が被覆されているので、密着性に優れた緻密な溶射皮膜部３２を強固に形成することができる。 Further, the fastening member of the present invention is coated with the sprayed coating portion 32 composed of 40:60 to 50:50 in volume ratio of zinc and aluminum by low-temperature arc spraying. Thus, it is possible to firmly form the sprayed coating portion 32.

また、溶射皮膜部３２が、締結部材３の表面の全体に一定の膜厚寸法Ｔ_３をもって均一に被覆形成されているので、締結部材３の内部応力のバランスを崩すことなく溶射皮膜部３２を被覆形成でき、海水に触れたり、あるいは、迷走電流が流れるような厳しい腐食環境下で、長期間使用することができる。 Furthermore, thermal spray coating unit 32, since it is uniformly coated form with a predetermined thickness dimension T ₃ on the entire surface of the fastening member 3, a thermal spray coating portion 32 without disturbing the balance of internal stress of the fastening member 3 The coating can be formed, and can be used for a long time in a severe corrosive environment where seawater is touched or a stray current flows.

１母材レール鋼
２溶射皮膜
３締結部材
４底部
４Ａ上面
４Ｂ下面
１０底部
１０Ｂ下面
１２頭部
１４養生部材
１５被溶射面部
２０被押圧部
２１亜鉛部
２２アルミニウム部
２３亜鉛微細粒
２４アルミニウム微細粒
３０押圧部
３２溶射皮膜部
Ｔ平均膜厚寸法
Ｔ_２膜厚寸法
Ｔ_３膜厚寸法
Ｒ_Ｚ平均表面粗さ
Ｍ枕木（まくらぎ）
Ａアルミニウム線材
Ｚ亜鉛線材 DESCRIPTION OF SYMBOLS 1 Base material rail steel 2 Thermal spray coating 3 Fastening member 4 Bottom part 4A Upper surface 4B Lower surface 10 Bottom part 10B Lower surface 12 Head part 14 Curing member 15 Sprayed surface part 20 Pressed part 21 Zinc part 22 Aluminum part 23 Zinc fine grain 24 Aluminum fine grain 30 Press part 32 Thermal spray coating part T Average film thickness dimension T ₂ Film thickness dimension T ₃ Film thickness dimension R _Z average surface roughness M Sleeper (sleeper)
A Aluminum wire Z Z Zinc wire

Claims

A railway characterized in that the upper surface (4A) and the lower surface (4B) of the bottom (4) are coated with a thermal spray coating (2) composed of zinc and aluminum in a volume ratio of 40:60 to 50:50. Rails.

The rail for railroad according to claim 1, wherein the sprayed coating (2) has a zinc portion (21) and an aluminum portion (22) deposited in a non-layered state.

The rail for railroad according to claim 1 or 2, wherein the sprayed coating (2) is formed by low temperature arc spraying.

The rail for railroad according to claim 1, 2 or 3, wherein an average film thickness dimension (T) of the thermal spray coating (2) is set to 200 µm ≤ T ≤ 500 µm.

Said thermally sprayed coating (2) ^is, 100g / ^m 2 ^~240g / m railway rails according to claim 1, 2, 3 or 4 wherein is sealing treatment at the ^second inorganic-based sealing agent.

The sprayed coating (2) is formed on the sprayed surface portion (15) in which the surface of the base material rail steel (1) is roughened by blasting to have an average surface roughness (R _Z ) of 50 μm or more. The rail for rails according to claim 1, 2, 3, 4 or 5.

The said bottom part which the press part (30) (30) of the said fastening member (3) (3) contacts in the use condition which fixed the said bottom part (4) to the sleeper (M) by the fastening member (3) (3) On the upper surface (4A) of (4), the film thickness dimension (T ₂ ) of the thermal spray coating (2) is locally thickened to 500 μm to 2000 μm, and the pressed portion (20) for fastening (20) ( The rail for rails according to claim 1, 2, 3, 4, 5, or 6 provided with 20).

The surface of the base rail steel (1) is roughened to form a sprayed surface portion (15), and an arc discharge is generated between the zinc wire (Z) and the aluminum wire (A) to generate the zinc wire (Z ) And the aluminum wire (A) are simultaneously melted, and compressed air is sprayed from the rear to form zinc fine particles (23) and aluminum fine particles (24). The zinc fine particles (23) and the aluminum fine particles (24 ) At a volume ratio of 40:60 to 50:50 and sprayed onto the surface to be sprayed (15) to deposit the zinc part (21) and the aluminum part (22) in a non-layered state. A rail anticorrosion treatment method for railroad, characterized by forming a film.

The rail anticorrosion treatment for railroad according to claim 8, wherein the temperature immediately before the zinc fine particles (23) and the aluminum fine particles (24) are sprayed onto the sprayed surface portion (15) is 40 ° C to 80 ° C. Method.

The head (12) of the base material rail steel (1) is covered with a curing member (14), and the bottom surface (10B) of the bottom (10) of the base material rail steel (1) is turned upside down. Inverted state,
The rail anti-corrosion treatment method for railroad according to claim 8 or 9, wherein the sprayed surface portion (15) is formed over the entire surface of the bottom portion (10) of the base material rail steel (1).

A fastening member in which a thermal spray coating (32) composed of zinc and aluminum in a volume ratio of 40:60 to 50:50 is coated by low-temperature arc spraying.

Said thermally sprayed coating section (32), said fastening member (3) fastening member according to claim 11, characterized in that the uniformly coated form with a predetermined thickness dimension (T ₃₎ on the entire surface of the.