JPS60121250A - Sintered al alloy for friction and sliding members - Google Patents

Abstract

PURPOSE:To obtain a titled sintered Al alloy that is suitable for lightening the weight of friction and sliding members by dispersing uniformly a prescribed amount of oxide, carbide, nitride of Si, Al, Zn and these solid solutions into Al material contg. prescribed Cu. CONSTITUTION:A sintered Al alloy in which the following rigid components and the components improving wearing properties are dispersed uniformly in a material are obtained by composing of 5-20% (expressed by weight hereinafter) Cu, 0.2-20% rigid components of at least one kind of oxide, carbide, nitride of Si, Al, Zr and these solid solutions, if necessary, 0.2-20% components for strengthening material of at least one kind of Mg, Si, Sn, Mn, Zn and/or 0.2-20% components improving wearing properties of at least one kind of Fe, Ni, Cr, Mo and these alloys and balance Al. Since said Al alloy is lightweight as a friction member and a sliding member such as a rolling stock and a power-operated machine and shows excellent characteristics, the lightening of the weight of these members is enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention has excellent wear resistance, and is particularly applicable to friction parts used in brakes and clutches in vehicles and power machines, as well as sliding parts such as current collector sliders in vehicles. This invention relates to a sintered M alloy suitable for use as a member.

Conventionally, friction members and sliding members used in this type of field have mainly been made of heavy sintered Fe, and now sintered Cu.
They are manufactured from alloys, but in today's world where energy conservation is a priority, demands on these parts to be lighter are becoming increasingly strict.

Therefore, from the above-mentioned viewpoint, the present inventors focused on M alloy in order to reduce the weight of these friction members and sliding members, and as a result of conducting research from the material aspect, the results were as follows: % by weight), Cu 5-20, oxides, carbides, and nitrides of Si, IV, and Zr, and solid solutions of two or more of these. Contains a hard component, 02 to 20 cycles, and further contains one of Mg, Si, Sn, Mn, and Zn as necessary.
Two or more types of substrate strengthening ingredients, 02-20, and F
e, Ni, C! r, and Mo, and these two
A composition containing one or more wear resistance improving components of the group consisting of alloys of 0.2 to 20, or both, with the remainder consisting of M and unavoidable impurities. The sintered M alloy has a structure in which the above-mentioned hard component, or the above-mentioned hard component and wear-resistance improving component are uniformly dispersed in the M or M alloy base, so that the weight can be reduced by the M or M alloy base. The hard component ensures excellent abrasion resistance, and therefore, when this sintered M alloy is used as a friction member or sliding member, it has excellent properties even under particularly severe conditions. We gained the knowledge that it can be demonstrated in terms of performance.

This invention has been made based on the above findings, and the reasons for limiting the component composition as described above will be fully explained below.

(a) C! u The Cu component completely forms the θ phase (/J (Eu2 compound)) to improve the hardness of the base and improve the wear resistance of the base, as well as improve the plastic deformation resistance of the base during friction and sliding. If the content is less than 5%, precipitation of the θ phase is too small and the desired effect cannot be obtained; If the content exceeds 5%, the amount of θ phase precipitated becomes too large and embrittlement phenomenon appears.
It was decided that there would be 20 people in charge.

(b) Hard component These components have the effect of uniformly dispersing in the matrix to form a dispersed phase and improving the wear resistance of the alloy due to their own hard properties. If the content is less than 20 parts, the desired effect of improving wear resistance cannot be obtained, whereas if the content exceeds 20 parts, the strength of the alloy will decrease.

(C) Base-strengthening components These components have the effect of generating a liquid phase at low temperatures during sintering to improve sinterability, and also strengthen the base by alloying with M, which constitutes the base. It is contained as necessary when strength is required for the alloy, but if the content is 0.
If it is less than 2%, the desired substrate strengthening effect cannot be obtained;
Since the weight reduction of the alloy will be impaired if the content exceeds k 0.2 to 20%.

(d) Abrasion resistance improving ingredients These ingredients have the effect of uniformly dispersing into the substrate and improving the abrasion resistance of the substrate, so they are especially necessary when the substrate is required to have abrasion resistance. However, if the content is less than 0.2%, the desired effect of improving wear resistance cannot be obtained, while if the content exceeds 20%, the strength of the alloy will decrease. However, since it becomes difficult to achieve the desired weight reduction, the content should be reduced from 0.2 to
It was decided that there would be 20 people in charge.

Next, the sintered M alloy of the present invention will be specifically explained using examples.

Example As a raw material powder, M powder with a particle size of -200 meeh was used.

Both are the same 5Qmesh 5102 powder, A#20
3 powder.

ZrO2 powder, SiC! Powder, ZrO powder, Si
3N4 powder.

AAN powder, ZrN powder, 5i02-A403 solid solution powder (contains M2O3:30), Zr0N powder, (
A6. Zr? , O, N powder.

and Zr0NO powder, M-Cu alloy powder (C!u: 30% content), Mg powder, both of which have the same 200 mθsh.

M-Mg alloy powder (Mg: 25% content), M-Si alloy powder (Si: 30% content), M-Mn alloy powder (Mn:
M-Ou-Sl-Mg alloy powder (CuNia%, IEi: 2%, Mg: 2% content)
, Same 150 mesl] Same amount of electrolytic O powder powder 00
Mesh Sn powder and Zn powder, and atomized Fe powder and Fe powder with the same 100 mθsh.
-Or alloy powder (contains Cr near zero coefficient), all the same 3
50meeh N1 powder and MO powder, same 100m
esh Or powder and Fe-M.

Prepare alloy powder (Mo: 60% content), mix these raw material powders to the composition shown in Table 1, and
After mixing for 30 minutes in a mold mixer, 3 to 5 tons
The powder compacts are press-formed at a predetermined pressure within the range of 500 to 650 m/cnl, and then the compacts are subjected to a total load of 2 Ky/ca in an ammonia decomposition gas atmosphere. Sintered M alloys 1 to 34 of the present invention having substantially the same composition as the blended composition by sintering at a predetermined temperature within the range of 60 minutes,
and the content of any of the constituent components (see Table 1*
Comparative sintered M alloys 1-9 were each produced whose compositions (marked) were outside the scope of this invention.

Next, the density and transverse rupture strength of the resulting sintered M alloys 1 to 34 of the present invention and comparative sintered M alloys 1 to 9 were measured, and a test piece shape of 25 was measured using a constant speed friction tester. Dimensions are 10 x Nakuchi, width is 1 x depth: 6 grooves are equally divided in the direction perpendicular to the friction direction, surface pressure: 10 Ky/ca, friction speed : 6.8
m/eec,, friction time: 5 hours, atmosphere: in oil, mating material: quenched and tempered 5K-5 (hardness: H
A friction test was conducted under the conditions of RO45), number of test pieces used: 2 pieces/time, and the wear depth and friction coefficient were measured. These measurement results are also shown in Table 1.

As shown in Table 1, all of the sintered M alloys 1 to 34 of the present invention have excellent wear resistance and exhibit excellent performance when put into practical use with friction members and sliding members. On the other hand, as seen in Comparative Sintered M Alloys 1 to 9, if the content of any of the constituent components falls outside the range of this invention, the wear resistance becomes inferior. is clear.

As mentioned above, the sintered M alloy of the present invention has excellent wear resistance despite its light weight, so it is excellent when used as various friction members and sliding members. It is clear that it exhibits excellent performance.

Applicant Mitsubishi Metals Co., Ltd. Agent: Tomi 1) Kazuo and 1 other person January 20, 1981 Patent Application No. 1982-229493 2 Title of the invention: Sintered A7 Alloy Utilizing Friction and Sliding Parts 3, Amended Relationship with the patent applicant (1) Cu: 5 to 20%, one of the group consisting of oxides, carbides, and nitrides of Si, AC, and Zr, and solid solutions of two or more of these. Ushita contains two or more hard components; 0.2 to 20%, with the remainder consisting of Al and unavoidable impurities (wt%), and the hard components described above are uniformly dispersed in the base material. A sintered M alloy for friction and sliding members characterized by having a microstructure.

(3Cu: 5-20%, one or more hard components from the group consisting of oxides, carbides, and nitrides of Si, AC, and Zr, and solid solutions of two or more of these) 202-20 %, and further contains one of Mg, Si, Sn, Mn, and Zn
A composition containing 20.2 to 20% of a base or two or more base strengthening components, with the remainder consisting of A, L and unavoidable impurities (in weight %), and a hard component uniformly contained in the base. A sintered A1 alloy for controlling friction and sliding parts, characterized by having a dispersed structure.

(3) Cu: 5 to 20%, one or more hard components from the group consisting of oxides, carbides, and nitrides of Si, AC, and Zr, and solid solutions of two or more of these 202 --20%, and further contains one or more wear resistance improving components of the group consisting of Fe, N, Cr, and Mo, and alloys of two or more of these; 0.2 to 20%, with the remainder being Al and unavoidable impurities. A sintered A1 alloy that utilizes friction and sliding parts.

((1) Cu 5-20%, one or more hard components from the group consisting of oxides, carbides, and nitrides of Si, AC, and Zr, and solid solutions of two or more of these = 0 .2 to 20%, and further contains 1 of Mg, Si, Sn, Mn, and Zn.
seeds or two or more types of substrate strengthening ingredients °02-20%, and F
e, Ni, Cr+ and Mo, and one or more wear-resistance improving components from the group consisting of two or more alloys of these; 02-20%; k; the remainder being A4 and unavoidable impurities. A sintered A1 alloy for friction and sliding members, characterized by having a composition (the above weight %) consisting of the following, and a structure in which the above-mentioned hard component and abrasion-improving component are uniformly dispersed in the matrix.

Claims (1)

[Claims] (1) Ou: 5-204, one or two of the group consisting of oxides, carbides, and nitrides of Si, M, and Zr, and solid solutions of two or more of these. It is characterized by having a composition (weight range) containing 0.2 to 20 of the above hard components, with the remainder consisting of M and unavoidable impurities, and a structure in which the above hard components are uniformly dispersed in the base material. Sintered M alloy for friction and sliding parts. (210u: 5 to 20%, one or more hard components from the group consisting of oxides, carbides, and nitrides of Si, Al?, and Zr, and solid solutions of two or more of these. .2~20%
, and further contains one of Mg, el, Sn, Mn, and Zn.
A composition containing a seed or two or more substrate strengthening components of 0.2 to 20%, with the remainder consisting of Au and unavoidable impurities (weight range above), and a structure in which the above hard components are uniformly dispersed in the substrate. A sintered M alloy for friction and sliding members, comprising: (31C!u: 5 to 20%, one or more hard components from the group consisting of Si, /u, and Zr oxides, carbides, and nitrides, and solid solutions of two or more of these : 0.2 to 20%, and further contains Fe, Ni, Or, and MO, and these two
A composition containing one or more wear resistance improving components 02 to 20 of the group consisting of alloys, with the remainder consisting of M and unavoidable impurities (weight L1)), and in the base material. A sintered M alloy for friction and sliding members, characterized in that it has a structure in which the hard component and the wear resistance improving component are uniformly dispersed. (4) Cu: 5 to 20 LI), oxides, carbides, and nitrides of Si, M, and Zr, and one or more hard materials from the group consisting of solid solutions of two or more of these. Ingredients: 0.2 to 20%, all contained, and one or more of Mg, lEi, 'Sn, Mn, and Zn as base strengthening components: 0.2 to 20%
and Fe, Ni, Or, and Mo, and one or more wear resistance improving components 902 to 20 of the group consisting of alloys of two or more of these, all of which are contained, and the remainder is M. A sintered layer alloy for controlling friction and sliding parts, characterized by having a composition (by weight %) consisting of and unavoidable impurities, and a structure in which the above-mentioned hard components and wear-resistance improving components are uniformly dispersed in the matrix.