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Iron-based sintered component, iron-based powder mixture and method for manufacturing iron-based sintered component

A technology of iron-based sintering and manufacturing method, which is applied to the rigid bracket of bearing components, bearing components, transportation and packaging, etc., can solve the problems of lack of iron-based powder bonding, low mechanical strength of iron-based sintered components, etc. The effect of mechanical strength

Active Publication Date: 2022-06-21
RESONAC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at a temperature at which graphite diffusion is difficult to occur, there is a lack of bonding due to the diffusion of iron-based powders, and the mechanical strength of the iron-based sintered component tends to decrease.

Method used

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  • Iron-based sintered component, iron-based powder mixture and method for manufacturing iron-based sintered component
  • Iron-based sintered component, iron-based powder mixture and method for manufacturing iron-based sintered component
  • Iron-based sintered component, iron-based powder mixture and method for manufacturing iron-based sintered component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Iron powder, copper powder, graphite powder, and mixed powder (A) containing aluminum stearate and sodium sulfate were put into a 10 kg V-type mixer so as to have the content ratio shown in Table 1, and mixed for 30 minutes to obtain Iron based powder mix.

Embodiment 2

[0086] Except having changed the mixed powder (A) to the mixed powder (B) containing aluminum stearate and sodium sulfate, it carried out similarly to Example 1, and obtained the iron-based powder mixture.

Embodiment 3

[0113] Using the iron-based powder mixture obtained in Example 1, a sintered body was produced according to the following method.

[0114] (Production of sintered body)

[0115] molding process

[0116] The iron-based powder mixture obtained in Example 1 was filled into a mold so that the density of the powder compact became 6.75 g / cm 3 The pressure was adjusted in a way to obtain a compacted powder with an outer diameter of 40 mm and a total length of 20 mm.

[0117] In the molding step, the powder compact can be taken out from the mold in a good state, and the powder compact has no defects such as scratches and nicks. By mixing the powder (A), a sufficient lubricating effect is obtained.

[0118] Sintering process

[0119] In the sintering furnace, under a non-oxidizing atmosphere (N 2 +5 vol% H 2 atmosphere), the powder compact was heated at 1,130° C. for 20 minutes to obtain a sintered body (iron-based sintered member). The optical microscope photograph of the cross...

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Abstract

One embodiment of the present invention relates to an iron-based sintered component having a metal structure including an iron matrix and pores dispersed in the iron matrix, the iron-based sintered component containing iron, 0.1 to 3.5% by mass of carbon, Aluminum, sodium and sulfur are enriched on the surface of the above-mentioned iron matrix connected with the above-mentioned pores, and the above-mentioned pores contain free carbon.

Description

technical field [0001] Embodiments of the present invention relate to an iron-based sintered component, an iron-based powder mixture, and a method of manufacturing an iron-based sintered component. Background technique [0002] The iron-based sintered member produced by the powder metallurgy method is suitable for various applications because it can produce the iron-based member with a special metal structure that cannot be obtained by the smelting method. [0003] One of the applications that requires a special metal structure is iron-based sintered components for bearing caps. The bearing cap is a member that holds a bearing that supports the crankshaft of the internal combustion engine rotatably. For example, the bearing cap has a substantially arched appearance, and is used by being fastened to an aluminum alloy cylinder block with bolts. figure 1 It is a schematic side view showing a state in which a bearing cap is attached to a cylinder block of an automobile engine....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/02B22F1/10C22C38/06C22C38/16C22C38/60B22F3/02B22F3/10B22F5/00F16C35/02B22F1/12
CPCC22C38/00F16C35/02C22C33/02B22F5/00B22F1/12
Inventor 山西祐司筒井唯之高桥昌史
Owner RESONAC CORPORATION
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