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Sintered sliding material, sliding member, connection device and device provided with sliding member

A technology of sliding materials and sliding components, which is applied in the field of devices applicable to sliding components, can solve problems such as damage, slowness, and insufficient prevention, and achieve the effects of excellent running-in performance, excellent wear resistance, and good baking resistance

Inactive Publication Date: 2006-06-07
KOMATSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Only the lubricating function of this molybdenum-iron alloy phase, under the above-mentioned extremely slow sliding speed and high surface pressure conditions of the connecting part of the working machine, or under the above-mentioned high-temperature and high-speed sliding conditions of the floating bearing bush for turbocharger, due to the combination with the mating member The local metal contact makes it impossible to sufficiently prevent the formation of the adhered part, and adhesive wear occurs, and there are problems that the running-in performance, baking resistance and wear resistance cannot be fully ensured.
In addition, hard MoFe (molybdenum-iron alloy) particles have a problem of significantly destroying sliding fitting materials.
In addition, since the addition amount of Mo is more than 5% by mass, it is considered that the sliding properties can be improved, but in this case, a new problem of reducing the structural strength of the sintered sliding material occurs.
In addition, from the amount of Pb and Mo added, there is a problem that the above-mentioned sticking caused by the outflow of Pb and the sticking caused by Mo cannot be realized.

Method used

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  • Sintered sliding material, sliding member, connection device and device provided with sliding member
  • Sintered sliding material, sliding member, connection device and device provided with sliding member
  • Sintered sliding material, sliding member, connection device and device provided with sliding member

Examples

Experimental program
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Effect test

Embodiment 1

[0168] Next, specific examples of the present invention will be described with reference to the drawings.

[0169] (Manufacturing method and verification of sintered material)

[0170] In this example, Mo(1) powder (average particle size 0.8 μm), Mo(2) powder (average particle size 4.7 μm), NiO (average particle size 0.7 μm), atomized copper powder (Japan atomized , SFR-Cu average particle size 10 μm), Ni powder (average particle size 1.2 μm), and TiH and Sn powders below #350 mesh were made into mixed powders as shown in Table 1, and 3% by mass was added to these mixed powders of paraffin, by adding 2ton / cm 2 pressure to form a cylindrical shape with an inner diameter of 46mm and a height of 50mm. Then, after sintering the obtained compacts at 950-1250°C for 1 hr, 2 Cooling under gas.

[0171] 【Table 1】

[0172] Combination structure of test material for Mo-based sliding material (% by weight)

[0173] Mo1

[0174] Here, No.A1 is a molded body mainly compose...

Embodiment 2

[0193] (Bearing test)

[0194] In this example, under the condition that the sintered sliding material of the present invention was fixed to any one of the test bearing pad and the test bearing shaft having the shape shown in Fig. 15, the test bearing pad and the test bearing Bearing tests between shafts. The roughness of the sliding surface, excluding the sintered holes, is all lathe-processed holes of about 2 to 5 μm, and the test bearing shaft used to fix the sliding fitting member of the test bearing pad of the sintered sliding material of the present invention is adjusted as follows , The surface layer of S45C carbon steel is subjected to high-frequency quenching and tempering (160 ° C), the surface hardness is HRC56, and the surface roughness is 1-3 μm or less through grinding. In addition, in the test bearing pad of the test bearing shaft to which the sintered sliding material of the present invention is fixed, 0.7% by mass of graphite powder (average Particle diamete...

Embodiment 3

[0288] Next, specific examples of the present invention will be described with reference to the drawings.

[0289] (Manufacturing method and verification of sintered sliding material)

[0290] In this example, Mo (1) powder (average particle diameter: 0.8 μm) and Mo (2) (average particle diameter: 4.7 μm) were blended with 3% by mass of paraffin wax, and the powder was pressed at 2 ton / cm 2 pressure to form a cylindrical shape with an inner diameter of 46mm and a height of 50mm. Then, after sintering the obtained compacts at 950-1250° C. for 1 hr, they were sintered with N 2 The gas is cooled.

[0291] Here, the molded body mainly composed of Mo(1) powder (molded body density: 4.65gr / cm 3 ), has shown significant shrinkage at 950°C, and its sinterability has been found. At 1100°C, 1150°C, and 1200°C, respectively, its sinterability is basically saturated, showing a significant shrinkage rate of 14.6%. A relative density of 74% (porosity of 41%) can be achieved to increase ...

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Abstract

The present invention provides a sintered sliding material, a sliding member and a connecting device that are excellent in baking resistance and wear resistance under extremely harsh lubrication conditions such as high surface pressure, low-speed sliding or swinging. The sintered sliding material of the present invention is composed of a sintered body containing 10 to 95% by mass of Cu or Cu alloy, the remainder being mainly Mo, and having a relative density of 80% or more.

Description

technical field [0001] The present invention relates to sintered sliding materials, sliding members, Connecting devices and devices for sliding members. Background technique [0002] Conventionally, oil-impregnated sliding bearings containing lubricating oil in the pores of Cu and Fe-based porous sintered alloys have been widely used as bearings that can be used with long intervals between greasing or without greasing. Here, the selection of Cu-based and Fe-based porous sintered alloys is determined according to conditions such as lubricating oil conditions, sliding speed, and sliding surface pressure. Under light-load high-speed sliding conditions, bronze-based oil-impregnated sliding bearings It is suitable for utilization. Under high surface pressure and low-speed sliding conditions, Fe-C, Fe-Cu, and Fe-C-Cu oil-impregnated sliding bearings are suitable for utilization (for example, refer to Non-Patent Document 1). Also, on the other hand, a sliding bearing in which gra...

Claims

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Application Information

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IPC IPC(8): C22C1/04
Inventor 高山武盛冈村和夫大西哲雄
Owner KOMATSU LTD
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