JPH0833111A - Currnet collecting pantograph slider materila of copper-infiltrated fe-base sintered alloy with high wear resistance and electric conductivity - Google Patents

Abstract

PURPOSE:To obtain a material having an excellent wear resistance and a low resistivity by infiltrating Cu or Cu alloy in Fe-base sintered alloy having a specific porosity for containing one or more of specific quantities of intermetallic compound of Fe and W, and specific quantities of Cu, Ni, Mo. CONSTITUTION:Fe-base sintered alloy which contains 5-30wt.% of intermetallic compound of Fe and W and 0.5-3wt.% of Cu, 2-6wt.% of Ni and 0.1-2wt.% of Mo as material forming components and the residue of Fe and unavoidable impurity compositions and 10-30% of porosity is manufactured. Pure Cu, Cu alloy containing Cu and 3wt.% of Co, or Cu alloy containing Cu, 3wt.% of Fe, l.5wt.% of Mo, l.5wt.% of Zn is infiltrated in the Fe-base alloy at 1135 deg.C in an ammonia decomposed gas atmosphere. Thus, a pantograph slider material which exhibits an excellent wear resistance and a low resistivity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collection of a copper-infiltrated Fe-based sintered alloy having excellent electrical conductivity and exhibiting particularly excellent wear resistance when used in an electric vehicle running at high speed. The present invention relates to a pantograph sliding board material for electric use.

[0002]

2. Description of the Related Art A conventional pantograph sliding plate material for an electric vehicle is, for example, Mo: 0.1 to 8.0% by weight, Fe-Mo.
Alloy: 1.0 to 15.0% by weight, optionally Cr: 1.0 to 15.0% by weight, and Cu: 0.1 to 5.0% by weight as a base forming component. %, Ni:
0.1 to 5.0% by weight, C: 0.02 to 0.5% by weight, with the balance being Fe and inevitable impurities,
In addition, it was composed of a lead-impregnated Fe-based sintered alloy obtained by impregnating Pb with a Fe-based sintered alloy having a porosity of 5 to 30% in terms of Pb impregnation weight ratio (see Japanese Patent Laid-Open No. 62-50445). ).

[0003]

However, in recent years, the speeding up of electric vehicles has been remarkable, and along with this, the pantograph 1
Since the current collection per unit increases, the wear of the contact plate tends to increase remarkably. In addition, the number of pantographs tends to be reduced in order to prevent an increase in noise due to the increase in speed, and this also causes an increase in the abrasion of the contact plate along with an increase in the current collecting current. Furthermore, the increase of the current collection increases the Joule heat due to the contact resistance between the contact plate and the trolley wire, which may cause heating and fusing of the trolley wire.
There has been a demand for a pantograph siding plate material having wear resistance far superior to that of a conventional pantograph siding plate material and having a low resistivity.

[0004]

In view of the above situation, the inventors of the present invention have conducted earnest studies to obtain a pantograph sliding plate material having excellent wear resistance and low resistivity, and as a result, the pantograph sliding plate material was A) Intermetallic compound of Fe and W: 5
30% by weight, and as a matrix forming component, C
u: 0.5 to 3% by weight, Ni: 2 to 6% by weight, Mo:
Fe having a composition of 0.1 to 2% by weight and the balance of Fe and unavoidable impurities Porosity: 10 to 30% Fe
Cu-infiltrated Fe-based sintered alloy prepared by infiltrating Cu or Cu alloy into a base-sintered alloy, (b) intermetallic compound of Fe and W: 5
-30% by weight, and further as a matrix forming component, C
u: 0.5 to 3% by weight, Ni: 2 to 6% by weight, Mo:
0.1-2% by weight, Cr: 0.2-2% by weight,
A Fe-based sintered alloy having a composition of balance Fe and unavoidable impurities and having a porosity of 10 to 30%, Cu or C
Copper infiltrated Fe-based sintered alloy obtained by infiltrating u alloy, (C) F
The intermetallic compound of e and W: 5 to 30% by weight, further containing Cu: 0.5 to 3% by weight, N as a matrix forming component.
i: 2 to 6% by weight, Mo: 0.1 to 2% by weight, Mn:
Fe having a composition of 0.2 to 2% by weight and the balance of Fe and inevitable impurities Porosity: 10 to 30% Fe
Cu-infiltrated Fe-based sintered alloy obtained by infiltrating Cu or Cu alloy into a basic sintered alloy, (d) intermetallic compound of Fe and W: 5
-30% by weight, and further as a matrix forming component, C
u: 0.5 to 3% by weight, Ni: 2 to 6% by weight, Mo:
0.1-2% by weight, Cr: 0.2-2% by weight, Mn:
Fe having a composition of 0.2 to 2% by weight and the balance of Fe and inevitable impurities Porosity: 10 to 30% Fe
Cu-infiltrated Fe-based sintered alloy prepared by infiltrating Cu or Cu alloy into a basic sintered alloy, (e) intermetallic compound of Fe and W: 5
-30% by weight, and further as a matrix forming component, C
u: 0.5 to 3% by weight, Mo: 0.1 to 2% by weight, C
r: 0.2 to 2 wt%, Mn: 0.2 to 2 wt%, and a composition of Fe and unavoidable impurities in the balance of Fe-based sintered alloy with porosity of 10 to 30%, Cu Alternatively, a copper infiltrated Fe-based sintered alloy obtained by infiltrating a Cu alloy,
(F) Intermetallic compound of Fe and W: 5 to 30% by weight, and Ni: 2 to 6% by weight as a matrix forming component,
Mo: 0.1 to 2% by weight, Cr: 0.2 to 2% by weight, M
n: 0.2 to 2% by weight, the balance of Fe and unavoidable impurities, the porosity: 10 to 30% Fe-based sintered alloy, Cu or Cu alloy is infiltrated with copper Immersed Fe-based sintered alloy, (G) intermetallic compound of Fe and W: 5 to 30% by weight, and further as a base forming component, Cr: 0.2 to 2% by weight, Mo: 0.1 to 2 % By weight, Mn: 0.2-2% by weight, the balance being Fe and inevitable impurities Porosity: 10-3
Cu-infiltrated Fe-based sintered alloy obtained by infiltrating Cu or Cu alloy into 0% Fe-based sintered alloy, any one of the above (a) to (g) According to the above, it has been found that it is possible to obtain a pantograph slide plate material for current collection made of a copper-infiltrated Fe-based sintered alloy having excellent wear resistance and excellent low resistivity.

The present invention has been made on the basis of such findings, and the reason why the component composition of the Fe-based sintered alloy constituting the pantograph friction plate material is limited as described above will be explained below.

Component A composition (a) Cu The Cu component partly dissolves in Fe to strengthen it,
In addition to forming a strong matrix with Fe, it also has the effect of improving electrical conductivity and arc resistance, but if its content is less than 0.5% by weight, the desired effect cannot be obtained for the above-mentioned action. However, if the content exceeds 3% by weight, the strength of the base material is reduced, so the content is 0.5.
˜3% by weight. A more preferable range is 1.2 to
It is 1.7% by weight.

(B) Ni The Ni component has the function of forming a solid solution with Fe forming the base material to improve the sinterability and strengthen the base material. On the other hand, the desired effect cannot be obtained. On the other hand, if the content exceeds 6% by weight, the solid solution in Fe becomes too large and the austenite structure remains, which makes it difficult to strengthen the matrix. The content was set to 2 to 6% by weight. A more preferable range is 3.5 to
It is 4.5% by weight.

(C) Mo The Mo component is added because it has a function of forming a solid solution with Fe of the base material to strengthen the base material and improve wear resistance and high temperature strength, but its content is 0.1% by weight. %, The desired effect cannot be obtained on the other hand, while the content is 2% by weight.
Since the effect is not improved even if the content exceeds the range, the content is set to 0.1 to 2% by weight. A more preferable range is
It is 0.3 to 0.7% by weight.

(D) Cr Cr has a function of solid-dissolving in Fe, which is a base forming component, to strengthen and harden the base, and to remarkably improve wear resistance and arc resistance. If the content is less than 2% by weight, the desired effect cannot be obtained, while if the content exceeds 2% by weight, the electrical conductivity tends to decrease, so that the content is 0.2 to 2% by weight. Set to%. A more preferable range is 0.7 to 1.2% by weight.

(E) Mn Mn is added because it has a function of forming a solid solution with Fe of the base material to strengthen the base material and improve wear resistance, but if the content is less than 0.2% by weight, The desired effect is not obtained on the other hand, and when the content exceeds 2% by weight, a remarkable hardened layer is formed due to sliding, so the content is set to 0.2 to 2% by weight. Specified. A more preferable range is 0.7 to 1.2% by weight.

(G) Intermetallic compound of Fe and W The intermetallic compound of Fe and W has a high Vickers hardness (Hv) of 500 to 800 in the matrix and is particularly resistant to wear under high speed running. And the adhesion resistance are significantly improved, but if the content is less than 5% by weight, the desired effect is not obtained on the other hand, while the content is 30% by weight.
If it exceeds, the content becomes brittle and the strength decreases, so the content was set to 5 to 30% by weight. A more preferable range is 13 to 17% by weight.

B. Porosity If the proportion is less than 10%, the proportion of Cu or Cu alloy infiltrated into the Fe-based sintered alloy is too small to ensure the excellent lubricity provided by Cu or Cu alloy, On the other hand, if the ratio exceeds 30%, F
Not only the strength of the e-based sintered alloy, that is, the strength of the siding plate material is lowered, but also the attacking ability against the Cu trolley wire, which is the counterpart material, is increased.
I decided. A more preferable range of the porosity is 18 to 2
It is 0%.

When Cu or a Cu alloy is infiltrated into the Fe-based sintered alloy, the electrical conductivity is improved, the arc generation rate is reduced, and the electrical conductivity is also improved as compared with the conventional lead-impregnated ground sheet material. Cu or C infiltrated into this Fe-based sintered alloy
The u alloy is a Cu alloy containing pure Cu, Co: 1 to 5% by weight and the balance of Cu and inevitable impurities, or Fe: 1 to 5% by weight, Mn: 0.5 to 3% by weight, It is preferable that any one of Cu alloys containing Zn: 0.5 to 3% by weight and the balance being Cu and inevitable impurities.

[0014]

[Examples] As raw material powder, water atomized iron powder having a particle size of -80 mesh, electrolytic copper powder having a particle size of -100 mesh,
Particle size: -100 mesh Ni powder, particle size: -200 mesh Cr powder, particle size: -200 mesh Mo powder,
Particle size: -200 mesh FeMn powder, particle size: -60
~ +200 mesh FeW powder is prepared, these raw material powders are blended so as to have the component composition shown in Tables 1 and 2, and mixed for 0.5 hours using a double cone mixer, and then within a range of 300 to 600 MPa. Press-molded into a green compact with a predetermined pressure of 0.01 to 2 torr
In a vacuum atmosphere within the range of temperature: 1200 to 1250
Sintering was performed under the conditions of 1 ° C. for 1 hour to produce Fe-based sintered alloys having the porosities shown in Tables 1 and 2.

In this Fe-based sintered alloy, pure Cu, a Cu alloy having a composition of Cu-3 wt% Co, and Cu-3 wt% Fe
A Cu alloy having a composition of -1.5% Mn-1.5% Zn was infiltrated in an atmosphere of ammonia decomposition gas at a temperature of 1135 ° C to obtain a width of 25 mm and a length of 80 mm.
Thickness: Pantograph siding plate material for current collection made of copper infiltrated Fe-based sintered alloy of the present invention having a dimension of 10 mm (hereinafter referred to as siding plate material of the present invention) 1 to 24, and JP-A-62-5044.
Conventional Pb-impregnated Fe-based sintered alloys having the composition described in Japanese Patent No. 5 were used to manufacture pantograph slabs for current collection (hereinafter referred to as conventional slabs).

[0016]

[Table 1]

[0017]

[Table 2]

Next, the resistivity of these siding plates was measured (JIS E6301 pantograph siding plate material resistivity test method), and the results are shown in Tables 3 and 4.
An accelerated wear test was also conducted. In the accelerated wear test, one side of a disc with an outer diameter of 2.2 m supported upright by fixing the center to a horizontal rotating shaft of a motor was used as a simulated trolley wire, with an outer diameter of 2 m, a width of 15 mm, and a thickness of: Hard copper ring (JISC1100 BB-H) with a dimension of 5 mm is 50 mm
Using an eccentrically mounted device, the above-mentioned hard copper ring is pressed at a pressing force of 50 N with a friction plate material at two locations on the diameter line to length:
80 mm × width: While making a dimension contact of 25 mm,
100V, 100A between the simulated trolley wire and the ground plate material
DC current is applied to the disk for 5.5 minutes to reach 250 km /
The rotation speed is increased to h, held at this speed for 5.5 minutes, and then stopped for 5.5 minutes to make one cycle.
This cycle was repeated four times to measure the wear weight of the sliding plate material and the wear depth of the simulated trolley wire of the mating material. From these measurement results, the specific wear amount of the contact plate material and the value per 5000 revolutions of the simulated trolley wire were calculated, and Table 3
The results are shown in Table 4 and Table 4.

[0019]

[Table 3]

[0020]

[Table 4]

[0021]

From the results shown in Tables 3 to 4, all of the siding plate materials 1 to 24 of the present invention show much lower abrasion resistance than the conventional siding plate materials, and are far superior in wear resistance. It is clear that it exhibits electrical conductivity and electrical conductivity. As described above, the copper infiltrated Fe-based sintered alloy-made pantograph sliding plate material for current collection of the present invention has excellent electrical conductivity,
When the contact plate made of this contact plate material is used in an electric vehicle running at high speed, it exhibits particularly excellent wear resistance, and can further extend the service life.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Teraoka 1-5-1, Otemachi, Chiyoda-ku, Tokyo Sanryo Materials Co., Ltd. No. 1 to 4 Tokai Passenger Railway Co., Ltd. (72) Inventor Masaru Iwase 4-1 Gakuendai, Miyashiro-cho, Minami-Saitama-gun, Saitama Nihon Institute of Technology

Claims (9)

[Claims] 1. An intermetallic compound of Fe and W: 5 to 30% by weight, further comprising Cu: 0.5 to 3% by weight, Ni: 2 to 6% by weight, Mo: 0 as a matrix forming component. 1 to 2% by weight, with the balance being Fe and inevitable impurities, porosity: 10 to 30
% Fe-based sintered alloy, Cu or Cu alloy is infiltrated with copper-infiltrated Fe-based sintered alloy, which is excellent in wear resistance and electrical conductivity Pantograph sliding plate made of base sintered alloy for current collection. 2. An intermetallic compound of Fe and W: 5 to 30% by weight, further comprising Cu: 0.5 to 3% by weight, Ni: 2 to 6% by weight, Mo: 0 as a matrix forming component. 1 to 2% by weight, Cr: 0.2 to 2% by weight, and the balance of Fe and inevitable impurities. Porosity: 10 to 30
% Fe-based sintered alloy, Cu or Cu alloy is infiltrated with copper-infiltrated Fe-based sintered alloy, which is excellent in wear resistance and electrical conductivity Pantograph sliding plate made of base sintered alloy for current collection. 3. An intermetallic compound of Fe and W: 5 to 30% by weight, further comprising Cu: 0.5 to 3% by weight, Ni: 2 to 6% by weight, Mo: 0 as a matrix forming component. 1 to 2% by weight, Mn: 0.2 to 2% by weight, and the balance of Fe and inevitable impurities. Porosity: 10 to 30
% Fe-based sintered alloy, Cu or Cu alloy is infiltrated with copper-infiltrated Fe-based sintered alloy, which is excellent in wear resistance and electrical conductivity Pantograph sliding plate made of base sintered alloy for current collection. 4. An intermetallic compound of Fe and W: 5 to 30% by weight, further comprising Cu: 0.5 to 3% by weight, Ni: 2 to 6% by weight, Mo: 0 as a matrix forming component. 1 to 2% by weight, Cr: 0.2 to 2% by weight, Mn: 0.2 to 2% by weight, and the balance of Fe and inevitable impurities.
% Fe-based sintered alloy, Cu or Cu alloy is infiltrated with copper-infiltrated Fe-based sintered alloy, which is excellent in wear resistance and electrical conductivity Pantograph sliding plate made of base sintered alloy for current collection. 5. An intermetallic compound of Fe and W: 5 to 30% by weight, further containing Cu: 0.5 to 3% by weight, Mo: 0.1 to 2% by weight, Cr as a matrix forming component. : 0.2 to 2% by weight, Mn: 0.2 to 2% by weight, and the balance of Fe and inevitable impurities. Porosity: 10 to 30
% Fe-based sintered alloy, Cu or Cu alloy is infiltrated with copper-infiltrated Fe-based sintered alloy, which is excellent in wear resistance and electrical conductivity Pantograph sliding plate made of base sintered alloy for current collection. 6. An intermetallic compound of Fe and W: 5 to 30% by weight, and further as a matrix forming component, Ni: 2 to 6% by weight, Mo: 0.1 to 2% by weight, Cr: 0. 2 to 2% by weight, Mn: 0.2 to 2% by weight, and the balance of Fe and inevitable impurities. Porosity: 10 to 30
% Fe-based sintered alloy, Cu or Cu alloy is infiltrated with copper-infiltrated Fe-based sintered alloy, which is excellent in wear resistance and electrical conductivity Pantograph sliding plate made of base sintered alloy for current collection. 7. An intermetallic compound of Fe and W: 5 to 30% by weight, and further as a matrix forming component, Cr: 0.2 to 2% by weight, Mo: 0.1 to 2% by weight, Mn. : 0.2 to 2% by weight, with the balance being Fe and inevitable impurities, Porosity: 10 to 30
% Fe-based sintered alloy, Cu or Cu alloy is infiltrated with copper-infiltrated Fe-based sintered alloy, which is excellent in wear resistance and electrical conductivity Pantograph sliding plate made of base sintered alloy for current collection. 8. The Cu alloy to be infiltrated is Co: 1 to 5
Copper infiltration having excellent wear resistance and electrical conductivity according to any one of claims 1 to 7, characterized in that it is made of a Cu alloy having a composition containing wt% and the balance being Cu and inevitable impurities. Pan-graph slab material for current collection made of Fe-based sintered alloy. 9. The Cu alloy to be infiltrated is Fe: 1 to 5
%, Mn: 0.5 to 3% by weight, Zn: 0.5 to 3% by weight, and the balance being a Cu alloy having a composition of Cu and inevitable impurities. A pantograph sliding plate material for current collection made of a copper-infiltrated Fe-based sintered alloy, which is excellent in wear resistance and electric conductivity in any one of 7 above.