CN105624586B - A kind of corrosion resistant bridge bearing steel suitable for marine environment - Google Patents
A kind of corrosion resistant bridge bearing steel suitable for marine environment Download PDFInfo
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- CN105624586B CN105624586B CN201511009728.1A CN201511009728A CN105624586B CN 105624586 B CN105624586 B CN 105624586B CN 201511009728 A CN201511009728 A CN 201511009728A CN 105624586 B CN105624586 B CN 105624586B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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Abstract
The present invention relates to a kind of corrosion resistant bridge bearing steel suitable for marine environment, it is characterised in that the bridge pad is included with composition of steel：By percentage to the quality, C：0.08~0.15%, Si:0.16~1.0%, Mn:0.5~1.6%, Cr：0.60~11.0%, Ni：0.30~2.0%, Al：0.01~0.5%, P≤0.015%, S≤0.015%, Cu≤0.80%, V≤0.06% and Mo≤0.35%, surplus are Fe and inevitable impurity element；The bridge pad is by following Technology for Heating Processing with steel：860~950 DEG C are heated to from room temperature in heating furnace, 3.0~5.0h is incubated, is subsequently cooled to room temperature.By regulating and controlling composition proportion and Technology for Heating Processing, decay resistance and mechanical property are improved, the need for disclosure satisfy that engineering to different corrosion-resistant grades and strength grade.
Description
Technical field
The present invention relates to technical field of metal material, more particularly to a kind of corrosion resistant bridge bearing suitable for marine environment
Use steel.
Background technology
Bridge pad directly affects performance and the life-span of bridge, to bridge as the connector of bridge up-down structure
Structure safety and durability play decisive role.In recent years, it is over strait big with the fast development of China's Coastal Areas economy
The construction of bridge and beach bridge increasingly increases, the chlorine replace more than these regional bridges in salt-fresh water, influenceed by seawater and salt fog
Compound environment, seawater salinity is high, and chloride ion content is larger, and the particularly long-term temperature in Coastal Areas of South China is higher, high humidity, season
Wait wind strong, bridge pad is even more serious by sea atmosphere corrosion, and the durability and Years Of Service of bridge will be severely impacted.
Current bridge pad is still using anti-corrosion measures such as japanning, coating or composite coatings, and such bearing is in ocean
The japanning easily timeliness problem such as peeling, the easy aging of coating in top layer occurs in environment, causes bearing service life to shorten, persistence
Difference, simultaneously because corner ponding position has no idea to use remedial measure, causes material to continue to corrode, deteriorates out of control, bearing
Overall performance declines to a great extent, the security of serious threat bridge.
The content of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of corrosion resistant bridge bearing steel suitable for marine environment,
This kind of steel can be used as bearing with exposed, not only with excellent decay resistance, while there is higher mechanical property, it is full
Foot difference trade mark performance requirement.
The purpose of the present invention is mainly achieved through the following technical solutions：
A kind of corrosion resistant bridge bearing steel suitable for marine environment of the invention, bridge pad composition of steel bag
Include：By percentage to the quality, C：0.08~0.15%, Si:0.16~1.0%, Mn:0.5~1.6%, Cr：0.60~
11.0%, Ni：0.30~2.0%, Al：0.01~0.5%, P≤0.015%, S≤0.015%, Cu≤0.80%, V≤
0.06% and Mo≤0.35%, surplus is Fe and inevitable impurity element；
The bridge pad is with steel heat treatment process：In heating furnace 860~950 DEG C, insulation 3.0 are heated to from room temperature
~5.0h, is subsequently cooled to room temperature.
Further, the type of cooling is air cooling, stove is cold or controls the type of cooling of cooling velocity.
Further, the cold mode of the stove is：Cool to blow-on after 500 DEG C with the furnace and be air-cooled to room temperature.
Further, it is described control cooling velocity the type of cooling be：550 DEG C are cooled to 80 DEG C/h cooling velocity,
Then it is air-cooled to room temperature.
The bridge pad is illustrated with the composition of steel：
C：The too low steel of C content difficulty on control is smelted is big, does not apply to Steel Castings enterprise equipment condition.The present invention
The carbon content scope 0.08~0.15% of middle steel.
Si：Si is present in ferrite or austenite with solid solution volume morphing, there is stronger solution strengthening effect, improves steel
Intensity.Consider steel-casting decay resistance and mechanical property requirements, Si contents control range Si of the present invention：0.16~
1.0%.
Mn：Manganese and iron formation solid solution, improve the hardness and intensity of ferrite and austenite in steel.Consider steel-casting
Mn content preferred scopes in decay resistance and mechanical property requirements, the present invention：0.5~1.6%.
P、S：P, S are often considered as impurity element in steel, and steel is purifying will effectively to reduce P, S content, but can increase
Steel-making cost, therefore, P, S content range in the present invention：P≤0.015%, S≤0.015%.
Cu：Cu be improve steel corrosion resistance alloying element, but according to the present invention result of the test, the present invention in Cu contents
Scope：0%~0.8%.The corrosion resisting property of steel can be ensured by alloying elements such as Cr, Ni, Mo, Al by being not added with Cu steel.
Ni：Ni can improve the resistance to corrosion of steel, be matched according to Cu, Cr, Ni content ranges in the present invention：0.3~
2.0%.
Al：Al is mainly used in deoxidation and crystal grain thinning, has certain contribution to the corrosion resistance of steel.Al content model in the present invention
Enclose：0.01~0.5%.
V：V is separated out in the form of C, N compound in ferrite, is acted on very strong precipitation strength, while crystal grain thinning,
Therefore, the intensity and toughness to steel have certain contribution.V content scope is added in the present invention：≤ 0.06%.
Mo：Mo can reduce Mo content ranges in the possibility of spot corrosion, the present invention：≤ 0.35%.
The present invention has the beneficial effect that：
A kind of corrosion resistant bridge bearing steel suitable for marine environment that the present invention is provided, by regulating and controlling composition proportion,
The corrosion resistance of bridge pad is reached maximum raising, and combine Technology for Heating Processing, further improve bridge pad
Mechanical property, greatly improves decay resistance on the premise of mechanical property is reached, so that it is corrosion-resistant etc. to difference to meet engineering
The need for level and strength grade.
Other features and advantages of the present invention will be illustrated in the following description, also, the partial change from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Book, claims are realized and obtained.
Embodiment
Technical solution of the present invention is further elaborated with reference to preferred embodiment, it will be appreciated that following examples are only
For explaining and illustrating the present invention, but the limitation to technical solution of the present invention is not constituted.
Included with composition：By percentage to the quality, C：0.30%, Si：0.17%, Mn：0.87%, P：0.021%, S：
0.013%, Cu：0.014%, Cr：0.038%, Ni：0.034%, surplus is Fe and inevitable impurity element, for contrast
Steel.
Embodiment 1
The embodiment of the present invention provides a kind of corrosion resistant bridge bearing steel suitable for marine environment, including：With quality hundred
Divide than meter, C：0.08%, Si：1.00%, Mn：0.92%, P：0.006%, S：0.004%, Cu：0.79%, Cr：2.03%,
Ni：0.86%, Al：0.025%, V：0.03%, surplus is Fe and inevitable impurity element；
The bridge pad is with steel heat treatment process：860 DEG C are heated to from room temperature in heating furnace, 3.5h is incubated, so
After be air-cooled to room temperature.
Embodiment 2
The embodiment of the present invention provides a kind of corrosion resistant bridge bearing steel suitable for marine environment, including：With quality hundred
Divide than meter, C：0.09%, Si：0.66%, Mn：0.96%, P：0.006%, S：0.004%, Cu：0.75%, Cr：0.63%,
Ni：1.21%, Al：0.032%, surplus is Fe and inevitable impurity element；
The bridge pad is with steel heat treatment process：900 DEG C are heated to from room temperature in heating furnace, 3h is incubated, then
It is air-cooled to room temperature.
Embodiment 3
The embodiment of the present invention provides a kind of corrosion resistant bridge bearing steel suitable for marine environment, including：With quality hundred
Divide than meter, C：0.12%, Si：0.51%, Mn：1.12%, P：0.006%, S：0.004%, Cu：0.49%, Cr：0.77%,
Ni：0.38%, Al：0.16%, V：0.06%, surplus is Fe and inevitable impurity element；
The bridge pad is with steel heat treatment process：950 DEG C are heated to from room temperature in heating furnace, 4.5h is incubated, so
After be air-cooled to room temperature.
Embodiment 4
The embodiment of the present invention provides a kind of corrosion resistant bridge bearing steel suitable for marine environment, including：With quality hundred
Divide than meter, C：0.12%, Si：0.65%, Mn：0.96%, P：0.006%, S：0.004%, Cu：0.39%, Cr：0.83%,
Ni：0.032%, Al：0.016%, Mo：0.30%, surplus is Fe and inevitable impurity element；
The bridge pad is with steel heat treatment process：930 DEG C are heated to from room temperature in heating furnace, 5h is incubated, then
It is air-cooled to room temperature.
Embodiment 5
The embodiment of the present invention provides a kind of corrosion resistant bridge bearing steel suitable for marine environment, including：With quality hundred
Divide than meter, C：0.12%, Si：0.66%, Mn：0.93%, P：0.006%, S：0.004%, Cu：0.49%, Cr：0.96%,
Ni：0.84%, Al：0.03%, surplus is Fe and inevitable impurity element；
The bridge pad is with steel heat treatment process：900 DEG C are heated to from room temperature in heating furnace, 4.5h is incubated, so
After be air-cooled to room temperature.
Embodiment 6
The embodiment of the present invention provides a kind of corrosion resistant bridge bearing steel suitable for marine environment, including：With quality hundred
Divide than meter, C：0.11%, Si：0.40%, Mn：0.55%, P：＜ 0.01%, S：＜ 0.01%, Cu：0.37%, Cr：
1.01%, Ni：0.042%, Al：0.49%, Mo：0.34%, surplus is Fe and inevitable impurity element；
The bridge pad is with steel heat treatment process：950 DEG C are heated to from room temperature in heating furnace, 5h is incubated, then
It is air-cooled to room temperature.
Embodiment 7
The embodiment of the present invention provides a kind of corrosion resistant bridge bearing steel suitable for marine environment, including：With quality hundred
Divide than meter, C：0.10%, Si：0.33%, Mn：1.24%, P：＜ 0.01%, S：＜ 0.01%, Cr：10.78%, Ni：
2.00%, Al：0.34%, surplus is Fe and inevitable impurity element；
The bridge pad is with steel heat treatment process：950 DEG C are heated to from room temperature in heating furnace, 5h is incubated, then
500 DEG C are furnace-cooled to, room temperature is air-cooled to.
Embodiment 8
The embodiment of the present invention provides a kind of corrosion resistant bridge bearing steel suitable for marine environment, including：With quality hundred
Divide than meter, C：0.11%, Si：0.26%, Mn：0.79%, P：＜ 0.01%, S：＜ 0.01%, Cr：10.33%, Ni：
0.31%, Al：0.011%, Mo：0.26%, surplus is Fe and inevitable impurity element；
The bridge pad is with steel heat treatment process：950 DEG C are heated to from room temperature in heating furnace, 5h is incubated, then
500 DEG C are furnace-cooled to, room temperature is air-cooled to.
Embodiment 9
The embodiment of the present invention provides a kind of corrosion resistant bridge bearing steel suitable for marine environment, including：With quality hundred
Divide than meter, C：0.10%, Si：0.18%, Mn：0.67%, P：＜ 0.01%, S：＜ 0.01%, Cu：0.34%, Cr：
5.31%, Ni：0.30%, Al：0.014%, surplus is Fe and inevitable impurity element；
The bridge pad is with steel heat treatment process：950 DEG C are heated to from room temperature in heating furnace, 4h is incubated, with 80
DEG C/h cooling velocity is cooled to 550 DEG C, is air-cooled to room temperature.
Embodiment 10
The embodiment of the present invention provides a kind of corrosion resistant bridge bearing steel suitable for marine environment, including：With quality hundred
Divide than meter, C：0.15%, Si：0.16%, Mn：0.50%, P：＜ 0.01%, S：＜ 0.01%, Cu：0.30%, Cr：
3.27%, Ni：0.52%, Al：0.014%, surplus is Fe and inevitable impurity element；
The bridge pad is with steel heat treatment process：950 DEG C are heated to from room temperature in heating furnace, 4h is incubated, with 80
DEG C/h cooling velocity is cooled to 550 DEG C, is air-cooled to room temperature.
Each embodiment main chemical compositions (%) of table 1
By the bridge pad steel and compared steel of above-described embodiment 1- embodiments 10 according to YB/T4367-2014《Reinforcing bar exists
Corrosion tests in chloride environment》Week leaching accelerated corrosion tests are carried out, experiment condition is：A diameter of a, length are cut for b
Sample in corrosive medium etching time be 72h, corrosive medium be 2%NaCl solution, relative humidity be 70 ± 10RH, temperature
For 45 DEG C ± 2 DEG C, PH is between 6.5-7.5, and the test period is 60min ± 5min, wherein infiltration 12min ± 2min；Then press
Average corrosion rate is calculated according to following calculation formula：
W=(w0- wt)×106/[πabt]
In formula：W is corrosion rate, g/m2·h；wtWeight after being derusted for the sample corrosion t times, g；w0Corrode for sample
Preceding weight, g；A, b are respectively the diameter and length , ㎜ of sample；T is test period, h.
The decay resistance comparative result of various embodiments of the present invention and compared steel is as shown in table 2, of the invention as seen from Table 2
Bridge pad is significantly better than compared steel with the decay resistance of steel.
Each embodiment of table 2 carries out the average corrosion rate of week leaching accelerated corrosion experiment with compared steel in 2%NaCl solution
(g/m2·h)
By ZG270-500 in the bridge pad steel and GB/T11352-2009 of above-described embodiment 1- embodiments 10,
Three kinds of steel of ZG310-570, ZG340-640 trade mark carry out mechanical property contrast, and its result is as shown in table 3, as can be seen from Table 3
The embodiment of the present invention is meeting the requirement of ZG270-500, ZG310-570, ZG340-640 trade mark yield strength and tensile strength
Meanwhile, the contraction percentage of area, the impact flexibility of each embodiment are required apparently higher than corresponding index, with excellent mechanical property.
The mechanical experimental results of each embodiment of table 3
The GB/T11352-2009 mechanical properties of table 4
In summary, the embodiments of the invention provide a kind of corrosion resistant bridge bearing steel suitable for marine environment, lead to
Regulation and control composition proportion is crossed, the corrosion resistance of bridge pad is reached maximum raising, and combines Technology for Heating Processing, further
The mechanical property of bridge pad is improved, decay resistance can be greatly improved while ensureing and there is higher mechanical property, from
And the need for disclosure satisfy that engineering to different corrosion-resistant grades and strength grade, security during increase use.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
It should all be included within the scope of the present invention.
Claims (1)
1. a kind of corrosion resistant bridge bearing steel suitable for marine environment, it is characterised in that the bridge pad composition of steel
For：By percentage to the quality, C：0.08~0.15%, Si:0.65~1.0%, Mn:0.92~1.6%, Cr：0.60~
2.03%, Ni：0.86~2.0%, Al：0.16~0.5%, P≤0.015%, S≤0.015%, Cu≤0.80%, V≤
0.06% and Mo≤0.26%, surplus is Fe and inevitable impurity element；
The bridge pad is with steel heat treatment process：In heating furnace 860~900 DEG C are heated to from room temperature, insulation 3.0~
5.0h, is subsequently cooled to room temperature；
The type of cooling be stove it is cold or control cooling velocity the type of cooling；
The cold mode of stove is：Cool to blow-on after 500 DEG C with the furnace and be air-cooled to room temperature；
It is described control cooling velocity the type of cooling be：550 DEG C are cooled to 80 DEG C/h cooling velocity, room is then air-cooled to
Temperature.
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| CN106555035B (en) * | 2016-11-01 | 2018-08-28 | 钢铁研究总院 | A kind of heat treatment process improving the anti-corrosion steel-casting impact flexibility of 3Cr |
| CN107254628B (en) * | 2017-05-24 | 2019-03-29 | 首钢集团有限公司 | A kind of resistance to SO2 and the construction(al)steel and production method of the corrosion of low chlorine ion concentration |
| CN108441762B (en) * | 2018-03-20 | 2020-01-14 | 武汉钢铁有限公司 | Steel for engine backing plate of large ocean vessel and production method |
| CN112159943B (en) * | 2020-09-22 | 2022-02-18 | 杭州斯泰新材料技术有限公司 | Metal material, preparation method thereof and steel structural member |
| CN112178032A (en) * | 2020-09-22 | 2021-01-05 | 杭州斯泰新材料技术有限公司 | Fastening piece |
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| CN112893774A (en) * | 2021-01-18 | 2021-06-04 | 衡水中裕铁信装备工程有限公司 | Method for reducing corrosion-resistant steel cracks for bridge support |
| CN114107840A (en) * | 2021-11-09 | 2022-03-01 | 石横特钢集团有限公司 | HRB400cE chloride ion corrosion resistant steel bar and production process thereof |
| CN114672605B (en) * | 2022-05-30 | 2022-09-16 | 江苏沙钢集团有限公司 | Corrosion-resistant steel bar mechanical connection sleeve, wire rod and production method of wire rod |
| CN115976429B (en) * | 2022-05-30 | 2024-06-14 | 昆明理工大学 | 600 MPa-level corrosion-resistant steel bar and preparation method thereof |
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| KR100812051B1 (en) * | 2006-11-08 | 2008-03-10 | 현대하이스코 주식회사 | Heat treating method for high-tensile steel sheet for car use in the batch annealing furnace |
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| CN105624586A (en) | 2016-06-01 |
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Address after: 100081 No. 76 South College Road, Beijing, Haidian District Patentee after: CENTRAL IRON AND STEEL Research Institute Patentee after: ZHONGLIAN ADVANCED STEEL TECHNOLOGY Co.,Ltd. Patentee after: Hengshui Zhongyu Tiexin equipment Engineering Co.,Ltd. Address before: 100081 No. 76 South College Road, Beijing, Haidian District Patentee before: CENTRAL IRON AND STEEL Research Institute Patentee before: ZHONGLIAN ADVANCED STEEL TECHNOLOGY Co.,Ltd. Patentee before: HENGSHUI YUCHANG CASTING CO.,LTD. |