CN102896320A - Warm-pressing process of powder metallurgy - Google Patents
Warm-pressing process of powder metallurgy Download PDFInfo
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- CN102896320A CN102896320A CN 201210455654 CN201210455654A CN102896320A CN 102896320 A CN102896320 A CN 102896320A CN 201210455654 CN201210455654 CN 201210455654 CN 201210455654 A CN201210455654 A CN 201210455654A CN 102896320 A CN102896320 A CN 102896320A
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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.
Description
Technical field
The present invention relates to a kind of warm-pressing technology of powder metallurgy.
Background technology
The technical essential of prior powder metallurgy technique finished parts is forming technique and material sintering technology, for the mechanical structure parts complex-shaped, that required precision is high, requirement to forming technique is very high, relatively harsher to the process of thermal treatment condition, once the cost of the ordinary powder metallurgical technology of compacting, sintering is 1, and then the cost of powder forging process is 2.0, and the cost of repressing and re-sintering technique is 1.5, the cost that oozes process for copper is 1.4, and cost is higher.Therefore, need to provide a kind of new technical scheme to solve the problems referred to above.
Summary of the invention
The warm-pressing technology that the purpose of this invention is to provide the low powder metallurgy of a kind of cost.
The technical solution used in the present invention:
The warm-pressing technology of powder metallurgy may further comprise the steps:
A, take by weighing alloy powder raw material, lubricant and additive, alloy powder, lubricant and additive are mixed by weight 10-30:1:1 respectively, form batch mixing;
B, batch mixing is suppressed preform, preform is carried out warm-pressing formation process, 130 ℃-150 ℃ of control temperature, control time 10-12 hour, the pressed density that warm-pressing formation is processed was 7.5-8g/cm
3, put into again the stove sintering, sintering temperature 1200-1400 ℃;
C, the preform behind the above-mentioned sintering is carried out deflashing, machining forms crude product;
D, with crude product, carry out impregnation process, surperficial steam treatment, temperature is high to 420-550 ℃, gets fabricated part;
Described additive is graphite;
Described alloy powder raw material is that copper is sowed alloy powder.
Described lubricant is the amide waxe micro mist.
Described lubricant is zinc stearate.
Advantage of the present invention is: processing step is simple, adopts warm-pressing formation treatment process pressed density to be improved, and the cost of warm-pressing technology is for only being 1.25, and surface smoothness is good, and sintering shrinkage is little, and yield strength and impact flexibility all are higher than traditional handicraft.
The specific embodiment
Following embodiment only is used for explanation the present invention, but can not limit protection scope of the present invention.
Embodiment 1
The warm-pressing technology of powder metallurgy may further comprise the steps:
A, take by weighing copper and sow alloy powder raw material, amide waxe micro mist and graphite, alloy powder, lubricant and additive are mixed by weight 10:1:1 respectively, form batch mixing;
B, batch mixing is suppressed preform, preform is carried out warm-pressing formation process, 130 ℃ of control temperature, in 10 hours control times, the pressed density that warm-pressing formation is processed is 7.5g/cm
3, put into again the stove sintering, 1200 ℃ of sintering temperatures;
C, the preform behind the above-mentioned sintering is carried out deflashing, machining forms crude product;
D, with crude product, carry out impregnation process, surperficial steam treatment, temperature is high to 420 ℃, gets fabricated part.
Embodiment 2
The warm-pressing technology of powder metallurgy may further comprise the steps:
A, title copper are sowed alloy powder, zinc stearate and graphite, and alloy powder, lubricant and additive are mixed by weight 20:1:1 respectively, form batch mixing;
B, batch mixing is suppressed preform, preform is carried out warm-pressing formation process, 140 ℃ of control temperature, in 11 hours control times, the pressed density that warm-pressing formation is processed is 7.7g/cm
3, put into again the stove sintering, 1300 ℃ of sintering temperatures;
C, the preform behind the above-mentioned sintering is carried out deflashing, machining forms crude product;
D, with crude product, carry out impregnation process, surperficial steam treatment, temperature is high to 480 ℃, gets fabricated part.
Embodiment 3
The warm-pressing technology of powder metallurgy may further comprise the steps:
A, take by weighing copper and sow alloy powder, amide waxe micro mist and graphite, alloy powder, lubricant and additive are mixed by weight 30:1:1 respectively, form batch mixing;
B, batch mixing is suppressed preform, preform is carried out warm-pressing formation process, 150 ℃ of control temperature, in 12 hours control times, the pressed density that warm-pressing formation is processed is 8g/cm
3, put into again the stove sintering, 1400 ℃ of sintering temperatures;
C, the preform behind the above-mentioned sintering is carried out deflashing, machining forms crude product;
D, with crude product, carry out impregnation process, surperficial steam treatment, temperature is high to 550 ℃, gets fabricated part.
Processing step is simple, adopts warm-pressing formation treatment process pressed density to be improved, and the cost of warm-pressing technology is for only being 1.25, and surface smoothness is good, and sintering shrinkage is little, and yield strength and impact flexibility all are higher than traditional handicraft.
Claims (3)
1. the warm-pressing technology of powder metallurgy is characterized in that, may further comprise the steps:
A, take by weighing alloy powder raw material, lubricant and additive, alloy powder, lubricant and additive are mixed by weight 10-30:1:1 respectively, form batch mixing;
B, batch mixing is suppressed preform, preform is carried out warm-pressing formation process, 130 ℃-150 ℃ of control temperature, control time 10-12 hour, the pressed density that warm-pressing formation is processed was 7.5-8g/cm
3, put into again the stove sintering, sintering temperature 1200-1400 ℃;
C, the preform behind the above-mentioned sintering is carried out deflashing, machining forms crude product;
D, with crude product, carry out impregnation process, surperficial steam treatment, temperature is high to 420-550 ℃, gets fabricated part;
Described additive is graphite;
Described alloy powder raw material is that copper is sowed alloy powder.
2. the warm-pressing technology of powder metallurgy according to claim 1, it is characterized in that: described lubricant is the amide waxe micro mist.
3. the warm-pressing technology of powder metallurgy according to claim 1, it is characterized in that: described lubricant is zinc stearate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210455654 CN102896320A (en) | 2012-11-14 | 2012-11-14 | Warm-pressing process of powder metallurgy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210455654 CN102896320A (en) | 2012-11-14 | 2012-11-14 | Warm-pressing process of powder metallurgy |
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| CN102896320A true CN102896320A (en) | 2013-01-30 |
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| CN 201210455654 Pending CN102896320A (en) | 2012-11-14 | 2012-11-14 | Warm-pressing process of powder metallurgy |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103231129A (en) * | 2013-04-28 | 2013-08-07 | 莱州天润机械有限公司 | Die stock and warm compaction process thereof |
| CN105252007A (en) * | 2015-10-29 | 2016-01-20 | 无锡桥阳机械制造有限公司 | Powder metallurgy technology |
| CN108327340A (en) * | 2018-04-28 | 2018-07-27 | 吴宇尧 | A kind of special type warm compaction molding equipment |
| CN108454157A (en) * | 2018-04-28 | 2018-08-28 | 吴宇尧 | A kind of intelligent temperature press forming device |
| CN108481790A (en) * | 2018-04-28 | 2018-09-04 | 吴宇尧 | A kind of warm compaction molding equipment |
-
2012
- 2012-11-14 CN CN 201210455654 patent/CN102896320A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103231129A (en) * | 2013-04-28 | 2013-08-07 | 莱州天润机械有限公司 | Die stock and warm compaction process thereof |
| CN105252007A (en) * | 2015-10-29 | 2016-01-20 | 无锡桥阳机械制造有限公司 | Powder metallurgy technology |
| CN108327340A (en) * | 2018-04-28 | 2018-07-27 | 吴宇尧 | A kind of special type warm compaction molding equipment |
| CN108454157A (en) * | 2018-04-28 | 2018-08-28 | 吴宇尧 | A kind of intelligent temperature press forming device |
| CN108481790A (en) * | 2018-04-28 | 2018-09-04 | 吴宇尧 | A kind of warm compaction molding equipment |
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Application publication date: 20130130 |