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Iron-based sintered sliding member, and process for production thereof

A technology of sliding parts and manufacturing methods, applied in the directions of bearing elements, mechanical equipment, shafts and bearings, etc., to achieve the effect of improving running-in and sliding characteristics

Inactive Publication Date: 2012-05-23
OILES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above-mentioned iron-based sintered sliding parts, in order to obtain the solid lubricating effect of carbon, the compounding amount of at least 3% by mass is required, but the iron powder and carbon powder react during the sintering process and precipitate in the sintered structure. High hardness free cementite (Fe 3 C) phenomenon

Method used

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  • Iron-based sintered sliding member, and process for production thereof
  • Iron-based sintered sliding member, and process for production thereof
  • Iron-based sintered sliding member, and process for production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Copper containing 90.5% by mass of copper, 4.1% by mass of iron, and 5.4% by mass of manganese and having an average particle size of 75 μm is mixed with atomized iron powder with an average particle size of 70 μm ("Atmel 300M" manufactured by Kobe Steel Co., Ltd.) - 12% by mass of iron-manganese alloy powder (manufactured by Fukuda Metal Foil Industry Co., Ltd.) and 3% by mass of natural graphite powder (manufactured by Nippon Graphite Co., Ltd.) with an average particle diameter of 40 μm as a carbon component, mixed in a V-shaped mixer for 20 minutes to obtain mixing Powder (copper component 10.86 mass%, manganese component 0.65 mass%, iron component 85.49 mass%, carbon component 3 mass%). Next, fill the mixed powder into a mold to carry out a molding pressure of 5 tons / cm 2 Shaping is performed to obtain a square compact.

[0058] The rectangular compact was placed in a heating furnace adjusted to a hydrogen atmosphere, solid-phase sintered at a temperature of 1000°...

Embodiment 2

[0060] Obtain the same mixed powder (10.86 mass % of copper component, 0.65 mass % of manganese component, 85.49 mass % of iron component, 3 mass % of carbon component) as above-mentioned Example 1, this mixed powder is packed in the mold, with molding pressure 5 tons / cm 2 Shaping is performed to obtain a square compact. The rectangular compact was placed in a heating furnace adjusted to a hydrogen atmosphere, liquid-phase sintered at a temperature of 1100° C. for 60 minutes, and then taken out from the heating furnace to obtain a square iron-based sintered material. The iron-based sintered material was machined to obtain an iron-based sintered sliding part having a size of 30 mm on one side and 5 mm in thickness. The density of this iron-based sintered sliding part is 6.7g / cm 3 , organized as figure 2 , image 3 As shown, there is a structure in which pearlite and part of ferrite coexist, and no free cementite is formed in the structure, and it is confirmed that the gra...

Embodiment 3

[0062] Copper-iron-manganese alloy powder with an average particle diameter of 75 μm containing 90.5% by mass of copper, 4.1% by mass of iron, and 5.4% by mass of manganese was blended with atomized iron powder with an average particle diameter of 70 μm (same as in Example 1 above). (Same as above-mentioned Example 1) 10% by mass and 3% by mass of natural graphite powder (same as above-mentioned Example 1) with an average particle diameter of 40 μm as a carbon component, mixed in a V-shaped mixer for 20 minutes to obtain a mixed powder (copper component 9.05% by mass, 0.54% by mass of the manganese component, 87.41% by mass of the iron component, and 3% by mass of the carbon component). Next, the mixed powder is filled into the mold, with a molding pressure of 5 tons / cm 2 Forming is performed to obtain a cylindrical compact.

[0063] The cylindrical compact was placed in a heating furnace adjusted to a hydrogen atmosphere, liquid-phase sintered at a temperature of 1100° C. fo...

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Abstract

Disclosed are: an iron-based sintered sliding member, in which the precipitation of free cementite in the structure does not occur, and which has excellent sliding properties including friction and abrasion; and a process for producing the sliding member. An alloy powder in an amount of 3 to 20 mass% and a carbon powder in an amount of 1 to 5 mass% are added to and mixed with an iron powder which is the main component to produce a mixed powder, wherein the alloy powder contains 4 to 6 mass% of manganese and 3 to 5 mass% of iron, with the remainder being copper. The mixed powder is filled in a mold to form a compressed powder having a desired shape. The compressed powder is sintered at a temperature of 1000 to 1100 DEG C for 60 minutes in a heating furnace which has been adjusted to a neutral or reductive atmosphere.

Description

technical field [0001] The present invention relates to an iron-based sintered sliding part having excellent sliding properties and a method for producing the same. Background technique [0002] Hitherto, iron-carbon or iron-copper-carbon bearing materials impregnated with a liquid lubricant (lubricating oil) have been known as iron-based sintered materials, and iron-carbon or iron-copper-carbon bearing materials have been known. It is a sintered material (for example, refer to Non-Patent Document 1). In the above-mentioned iron-based sintered sliding parts up to now, in order to obtain the solid lubricating effect of carbon, the compounding amount of at least 3% by mass is required, but the iron powder and carbon powder react during the sintering process and precipitate in the sintered structure. High hardness free cementite (Fe 3 C) phenomenon. The precipitation of the high-hardness free cementite in the structure causes the disadvantage of damaging the shaft (partner m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/16C22C33/02B22F3/26B22F5/00C22C9/00C22C9/05
CPCC22C9/05C22C38/04B22F2998/10B22F3/26C22C33/0228C22C33/0257C22C38/16F16C33/121F16C33/104B22F3/02B22F3/1007
Inventor 白坂康广
Owner OILES CORP
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