CN107695335A - A kind of powder metallurgy prescription and its metallurgical forming method - Google Patents
A kind of powder metallurgy prescription and its metallurgical forming method Download PDFInfo
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- CN107695335A CN107695335A CN201710736726.5A CN201710736726A CN107695335A CN 107695335 A CN107695335 A CN 107695335A CN 201710736726 A CN201710736726 A CN 201710736726A CN 107695335 A CN107695335 A CN 107695335A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F3/26—Impregnating
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/241—Chemical after-treatment on the surface
Abstract
The present invention relates to a kind of powder metallurgy prescription, including graphite powder, copper powder, stearic acid, zinc oxide, iron powder, vulcanization sub- manganese, aluminum oxide, Cutting free agent, micro mist wax and reinforcing agent;It is characterized in that:Measure by mass:15 parts of graphite powder, 5 10 parts of copper powder, 28 parts of stearic acid, 58 parts of zinc oxide, 50 98 parts of iron powder, vulcanization sub- 0.2 0.5 parts of 15 parts of manganese, 5 10 parts of aluminum oxide, 0.2 0.5 parts of Cutting free agent, 0.5 1 parts of micro mist wax and reinforcing agent;The blank that setting shape is pressed under 60-70MPa pressure is standby;The product blank part is sent into sintering electric furnace and sinters semi-finished articles into;By immersion oil and steam treatment, cleaning obtains finished product;This formula environmental pollution is small, and this method simplifies production stage, improves production efficiency.
Description
Technical field
The present invention relates to field of powder metallurgy, more particularly to a kind of powder metallurgy prescription and its metallurgical forming method.
Background technology
Powder metallurgy produces metal dust and by the technique such as shaping and sintering by metal dust and non-metal powder
The processing method that finished product is made in mixture.
Powder metallurgical technique used by generally, environmental pollution is larger, and in machinery industry, everybody also increasingly advocates
Simplified production stage is led, improves production efficiency.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of formula of powder metallurgy, another object of the present invention is to carry
For its metallurgical method, this formula environmental pollution is small, and this method simplifies production stage, improves production efficiency.
In order to solve the above technical problems, the technical scheme is that:A kind of powder metallurgy prescription, including graphite powder, copper
Powder, stearic acid, zinc oxide, iron powder, vulcanization sub- manganese, aluminum oxide, Cutting free agent, micro mist wax and reinforcing agent;Its innovative point is:Press
Mass metrology:Graphite powder 1-5 parts, copper powder 5-10 parts, stearic acid 2-8 parts, zinc oxide 5-8 parts, iron powder 50-98 parts, the sub- manganese of vulcanization
1-5 parts, aluminum oxide 5-10 parts, Cutting free agent 0.2-0.5 parts, micro mist wax 0.5-1 parts and reinforcing agent 0.2-0.5 parts;
The graphite powder, copper powder, zinc oxide, iron powder, the granularity of the sub- manganese of vulcanization and aluminum oxide are 400-600 microns;
The iron powder includes water-atomized iron powder and reduced iron powder, and water-atomized iron powder accounts for mass ratio as 30% in the iron powder, reduced iron
Powder accounts for mass ratio as 70%.
A kind of metallurgical forming method of powder metallurgy prescription, its innovative point are:Comprise the following steps:
S1:By graphite powder 1-5 parts, copper powder 5-10 parts, stearic acid 2-8 parts, zinc oxide 5-8 parts, iron powder 50-98 parts,
Vulcanize sub- manganese 1-5 parts, aluminum oxide 5-10 parts, Cutting free agent 0.2-0.5 parts, micro mist wax 0.5-1 parts and reinforcing agent 0.2-0.5
Part is well mixed;
S2:The powder that previous step is mixed is put into mould, and the blank that setting shape is pressed under 60-70MPa pressure is standby
With;
S3 :The product blank part is sent into sintering electric furnace, temperature 170-250 degree, described product blank sintered
Into semi-finished articles;
S4:Described semi-finished articles are cooled down and immersed in machine oil and are handled, 70 DEG C to 90 DEG C, the immersion oil time is 35 minutes to 55
Minute;
S5:The product that upper step is obtained carries out steam treatment, and antirust coat is produced on finished parts surface;
S6:Cleaning obtains finished product.
The advantage of the invention is that:
1)This formula environmental pollution is small, and this method simplifies production stage, improves production efficiency.
Embodiment
The following examples can make professional and technical personnel that the present invention be more fully understood, but therefore not send out this
It is bright to be limited among described scope of embodiments.
Embodiment 1:
A kind of powder metallurgy prescription, including graphite powder, copper powder, stearic acid, zinc oxide, iron powder, the sub- manganese of vulcanization, aluminum oxide, easily cut
Cut agent, micro mist wax and reinforcing agent;Its innovative point is:Measure by mass:1 part of graphite powder, 5 parts of copper powder, 2 parts of stearic acid, oxidation
5 parts of zinc, 50 parts of iron powder, vulcanization sub- 1 part of manganese, 5 parts of aluminum oxide, 0.2 part of Cutting free agent, 0.5 part of micro mist wax and reinforcing agent 0.2
Part;
The graphite powder, copper powder, zinc oxide, iron powder, the granularity of the sub- manganese of vulcanization and aluminum oxide are 400 microns;
The iron powder includes water-atomized iron powder and reduced iron powder, and water-atomized iron powder accounts for mass ratio as 30% in the iron powder, reduced iron
Powder accounts for mass ratio as 70%.
A kind of metallurgical forming method of powder metallurgy prescription, comprises the following steps:
S1:By 1 part of graphite powder, 5 parts of copper powder, 2 parts of stearic acid, 5 parts of zinc oxide, 50 parts of iron powder, sub- 1 part of the manganese of vulcanization, oxygen
It is well mixed to change 0.2 part of 5 parts of aluminium, 0.2 part of Cutting free agent, 0.5 part of micro mist wax and reinforcing agent;
S2:The powder that previous step is mixed is put into mould, and the blank that setting shape is pressed under 60MPa pressure is standby;
S3 :The product blank part is sent into sintering electric furnace, 170 degree of temperature, sinters described product blank into half
Finished parts;
S4:Described semi-finished articles are cooled down and immersed in machine oil and are handled, 70 DEG C, the immersion oil time is 35 minutes;
S5:The product that upper step is obtained carries out steam treatment, and antirust coat is produced on finished parts surface;
S6:Cleaning obtains finished product.
Embodiment 2:
A kind of powder metallurgy prescription, including graphite powder, copper powder, stearic acid, zinc oxide, iron powder, the sub- manganese of vulcanization, aluminum oxide, easily cut
Cut agent, micro mist wax and reinforcing agent;Measure by mass:3 parts of graphite powder, 7 parts of copper powder, 5 parts of stearic acid, 6 parts of zinc oxide, iron powder 75
Part, vulcanization sub- 0.3 part of 3 parts of manganese, 7 parts of aluminum oxide, 0.3 part of Cutting free agent, 0.7 part of micro mist wax and reinforcing agent;
Graphite powder, copper powder, zinc oxide, iron powder, the granularity of the sub- manganese of vulcanization and aluminum oxide are 500 microns;
The iron powder includes water-atomized iron powder and reduced iron powder, and water-atomized iron powder accounts for mass ratio as 30% in the iron powder, reduced iron
Powder accounts for mass ratio as 70%.
A kind of metallurgical forming method of powder metallurgy prescription, comprises the following steps:
S1:By 3 parts of graphite powder, 7 parts of copper powder, 5 parts of stearic acid, 6 parts of zinc oxide, 75 parts of iron powder, sub- 3 parts of the manganese of vulcanization, aluminum oxide 7
0.3 part of part, 0.3 part of Cutting free agent, 0.7 part of micro mist wax and reinforcing agent are well mixed;
S2:The powder that previous step is mixed is put into mould, and the blank that setting shape is pressed under 65MPa pressure is standby;
S3 :The product blank part is sent into sintering electric furnace, 210 degree of temperature, sinters described product blank into half
Finished parts;
S4:Described semi-finished articles are cooled down and immersed in machine oil and are handled, 80 DEG C, the immersion oil time is 45 minutes;
S5:The product that upper step is obtained carries out steam treatment, and antirust coat is produced on finished parts surface;
S6:Cleaning obtains finished product.
Embodiment 3:
A kind of powder metallurgy prescription, including graphite powder, copper powder, stearic acid, zinc oxide, iron powder, the sub- manganese of vulcanization, aluminum oxide, easily cut
Cut agent, micro mist wax and reinforcing agent;Measure by mass:5 parts of graphite powder, 10 parts of copper powder, 8 parts of stearic acid, 8 parts of zinc oxide, iron powder 98
Part, vulcanization sub- 0.5 part of 5 parts of manganese, 10 parts of aluminum oxide, 0.5 part of Cutting free agent, 1 part of micro mist wax and reinforcing agent;
The graphite powder, copper powder, zinc oxide, iron powder, the granularity of the sub- manganese of vulcanization and aluminum oxide are 600 microns;
The iron powder includes water-atomized iron powder and reduced iron powder, and water-atomized iron powder accounts for mass ratio as 30% in the iron powder, reduced iron
Powder accounts for mass ratio as 70%.
A kind of metallurgical forming method of powder metallurgy prescription, its innovative point are:Comprise the following steps:
S1:By 5 parts of graphite powder, 10 parts of copper powder, 8 parts of stearic acid, 8 parts of zinc oxide, 98 parts of iron powder, the sub- manganese 5 of vulcanization
0.5 part of part, 10 parts of aluminum oxide, 0.5 part of Cutting free agent, 1 part of micro mist wax and reinforcing agent are well mixed;
S2:The powder that previous step is mixed is put into mould, and the blank that setting shape is pressed under 70MPa pressure is standby;
S3 :The product blank part is sent into sintering electric furnace, 250 degree of temperature, sinters described product blank into half
Finished parts;
S4:Described semi-finished articles are cooled down and immersed in machine oil and are handled, 90 DEG C, the immersion oil time is 55 minutes;
S5:The product that upper step is obtained carries out steam treatment, and antirust coat is produced on finished parts surface;
S6:Cleaning obtains finished product.
It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, above-described embodiment and explanation
Merely illustrating the principles of the invention described in book, without departing from the spirit and scope of the present invention, the present invention also have
Various changes and modifications, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention
By appended claims and its equivalent thereof.
Claims (2)
1. a kind of powder metallurgy prescription, including graphite powder, copper powder, stearic acid, zinc oxide, iron powder, the sub- manganese of vulcanization, aluminum oxide, easily
Cutting agent, micro mist wax and reinforcing agent;It is characterized in that:Measure by mass:Graphite powder 1-5 parts, copper powder 5-10 parts, stearic acid 2-8
Part, zinc oxide 5-8 parts, iron powder 50-98 parts, the sub- manganese 1-5 parts of vulcanization, aluminum oxide 5-10 parts, Cutting free agent 0.2-0.5 parts,
Micro mist wax 0.5-1 parts and reinforcing agent 0.2-0.5 parts;
The graphite powder, copper powder, zinc oxide, iron powder, the granularity of the sub- manganese of vulcanization and aluminum oxide are 400-600 microns;
The iron powder includes water-atomized iron powder and reduced iron powder, and water-atomized iron powder accounts for mass ratio as 30% in the iron powder, reduced iron
Powder accounts for mass ratio as 70%.
A kind of 2. metallurgical forming method of powder metallurgy prescription described in claim 1, it is characterised in that:Including following step
Suddenly:
S1:By graphite powder 1-5 parts, copper powder 5-10 parts, stearic acid 2-8 parts, zinc oxide 5-8 parts, iron powder 50-98 parts, sulphur
Change sub- manganese 1-5 parts, aluminum oxide 5-10 parts, Cutting free agent 0.2-0.5 parts, micro mist wax 0.5-1 parts and reinforcing agent 0.2-0.5 parts
It is well mixed;
S2:The powder that previous step is mixed is put into mould, and the blank that setting shape is pressed under 60-70MPa pressure is standby
With;
S3 :The product blank part is sent into sintering electric furnace, temperature 170-250 degree, described product blank sintered
Into semi-finished articles;
S4:Described semi-finished articles are cooled down and immersed in machine oil and are handled, 70 DEG C to 90 DEG C, the immersion oil time is 35 minutes to 55
Minute;
S5:The product that upper step is obtained carries out steam treatment, and antirust coat is produced on finished parts surface;
S6:Cleaning obtains finished product.
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108273991A (en) * | 2018-03-15 | 2018-07-13 | 中机锻压江苏股份有限公司 | A kind of bearing block metallurgical powder |
CN108453251A (en) * | 2018-03-15 | 2018-08-28 | 江苏中威重工机械有限公司 | A kind of motor housing metallurgical powder |
CN109513938A (en) * | 2018-11-20 | 2019-03-26 | 广州市光铭金属制品有限责任公司 | A kind of drawing-inroller material and preparation method thereof for wood working machinery |
CN109972046A (en) * | 2019-04-06 | 2019-07-05 | 苏州中鼎冶金有限公司 | A kind of processing technology of powder metallurgy planetary gear |
CN113020601A (en) * | 2021-02-05 | 2021-06-25 | 鞠真飞 | Throwing fly cutter capable of building body for physical training and manufacturing method thereof |
CN114309584A (en) * | 2021-12-31 | 2022-04-12 | 江苏博瑞工具有限公司 | Twist drill with high strength and high cutting performance and manufacturing method thereof |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102921945A (en) * | 2012-11-21 | 2013-02-13 | 王恒傲 | Powder metallurgy formula and powder metallurgy method thereof |
CN103266271A (en) * | 2013-05-29 | 2013-08-28 | 东睦(江门)粉末冶金有限公司 | Powder metallurgical formula and technology |
CN106424707A (en) * | 2016-10-19 | 2017-02-22 | 广西南宁智翠科技咨询有限公司 | High-strength powder metallurgy material of axle parts of automobile |
CN106563797A (en) * | 2016-10-19 | 2017-04-19 | 广西南宁智翠科技咨询有限公司 | Automobile axle part powder metallurgical material with large elongation percentage |
CN106623891A (en) * | 2016-10-19 | 2017-05-10 | 广西南宁智翠科技咨询有限公司 | Automobile shaft component powder metallurgy material |
-
2017
- 2017-08-24 CN CN201710736726.5A patent/CN107695335A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102921945A (en) * | 2012-11-21 | 2013-02-13 | 王恒傲 | Powder metallurgy formula and powder metallurgy method thereof |
CN103266271A (en) * | 2013-05-29 | 2013-08-28 | 东睦(江门)粉末冶金有限公司 | Powder metallurgical formula and technology |
CN106424707A (en) * | 2016-10-19 | 2017-02-22 | 广西南宁智翠科技咨询有限公司 | High-strength powder metallurgy material of axle parts of automobile |
CN106563797A (en) * | 2016-10-19 | 2017-04-19 | 广西南宁智翠科技咨询有限公司 | Automobile axle part powder metallurgical material with large elongation percentage |
CN106623891A (en) * | 2016-10-19 | 2017-05-10 | 广西南宁智翠科技咨询有限公司 | Automobile shaft component powder metallurgy material |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108273991A (en) * | 2018-03-15 | 2018-07-13 | 中机锻压江苏股份有限公司 | A kind of bearing block metallurgical powder |
CN108453251A (en) * | 2018-03-15 | 2018-08-28 | 江苏中威重工机械有限公司 | A kind of motor housing metallurgical powder |
CN109513938A (en) * | 2018-11-20 | 2019-03-26 | 广州市光铭金属制品有限责任公司 | A kind of drawing-inroller material and preparation method thereof for wood working machinery |
CN109972046A (en) * | 2019-04-06 | 2019-07-05 | 苏州中鼎冶金有限公司 | A kind of processing technology of powder metallurgy planetary gear |
CN113020601A (en) * | 2021-02-05 | 2021-06-25 | 鞠真飞 | Throwing fly cutter capable of building body for physical training and manufacturing method thereof |
CN113020601B (en) * | 2021-02-05 | 2023-03-10 | 鞠真飞 | Throwing fly cutter capable of building body for physical training and manufacturing method thereof |
CN114309584A (en) * | 2021-12-31 | 2022-04-12 | 江苏博瑞工具有限公司 | Twist drill with high strength and high cutting performance and manufacturing method thereof |
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