Warm-pressing process of powder metallurgy

A powder metallurgy and warm pressing technology, applied in the field of powder metallurgy warm pressing process, can solve the problems of harsh process conditions and high cost, and achieve the effects of good surface finish, improved pressing density and simple process steps.
CN102896320AInactive Publication Date: 2013-01-30曹艺
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
曹艺
Publication Date
2013-01-30
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a warm-pressing process of powder metallurgy. The warm-pressing process comprises the following steps of: a, weighing an alloy powder raw material, a lubricating agent and an additive; mixing the alloy powder, the lubricating agent and the additive in a weight ratio of (10-30): 1: 1 to form a mixed material; b, pressing the mixed material into a pre-formed blank; carrying out warm-pressing treatment on the pre-formed blank; controlling the temperature to 130-150 DEG C and controlling the time to 10-12 hours, wherein the pressing density of warm-pressing forming treatment is 7.5-8g / cm<3>; putting into a furnace to be sintered, wherein the sintering temperature is 1200-1400 DEG C; c, de-burring the sintered pre-formed blank; cutting and machining to form a rough product; and d, carrying out immersing treatment on the rough product; and carrying out surface steam treatment at the temperature of 420-550 DEG C to obtain a finished-product part. The process disclosed by the invention has simple steps; the pressing density is improved by adopting a warm-pressing forming treatment process and the cost of the warm-pressing process is only 1.25; the surface smoothness is good and the sintering shrinking percentage is small; and the yielding strength and the impacting toughness are better than those of a traditional process.
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Description

technical field

[0001] The invention relates to a powder metallurgy warm pressing process. Background technique

[0002] The technical points of traditional powder metallurgy manufacturing parts are forming technology and material sintering technology. For mechanical structural parts with complex shapes and high precision requirements, the requirements for forming technology are very high, and the process conditions for heat treatment are relatively harsh. One-time pressing and sintering The cost of the ordinary powder metallurgy process is 1, the cost of the powder forging process is 2.0, the cost of the repressing and refiring process is 1.5, and the cost of the copper infiltration process is 1.4, which is relatively high. Therefore, it is necessary to provide a new technical solution to solve the above problems. Contents of the invention

[0003] The purpose of the present invention is to provide a low-cost powder metallurgy warm pressing process.

[0004] The technic...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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