CN110760759A - Powder metallurgy sintering process for sliding block - Google Patents
Powder metallurgy sintering process for sliding block Download PDFInfo
- Publication number
- CN110760759A CN110760759A CN201911220990.9A CN201911220990A CN110760759A CN 110760759 A CN110760759 A CN 110760759A CN 201911220990 A CN201911220990 A CN 201911220990A CN 110760759 A CN110760759 A CN 110760759A
- Authority
- CN
- China
- Prior art keywords
- section
- sintering
- temperature
- sintering process
- preheating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005245 sintering Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 14
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims abstract description 8
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 4
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 abstract description 5
- 239000006104 solid solution Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- 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
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- 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
- B22F3/1017—Multiple heating or additional steps
- B22F3/1021—Removal of binder or filler
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
Abstract
The invention provides a powder metallurgy sintering process of a sliding block, which comprises the following components in percentage by weight: 2-4% of Cu, 06-1.2% of C, 1-3% of Ni, the balance of Fe and no more than 2% of other additives; the sintering process comprises a preheating section, a wax removing section and a sintering section; the preheating section and the wax removal section comprise three temperature sections which are respectively as follows: first-stage preheating-stage temperature: 560 ℃ plus 20 ℃; temperature of the second wax removal section: 720 +/-10 ℃; third-stage temperature: 900 plus or minus 10 ℃; the temperature of the sintering section is 1150 +/-10 ℃; the preheating section, the wax removing section and the sintering section are all carried out under the protective atmosphere condition which is as follows: decomposing ammonia 4-7m3H, nitrogen gas 22m3/h～25m3H is used as the reference value. The invention greatly improves the hardness, strength and tensile strength of the product, and solves the problems of large deformation and difficult processing in the prior artAnd the problems of quick abrasion of the long slide block, short service life and the like.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of powder metallurgy, in particular to a powder metallurgy sintering process of a sliding block.
[ background of the invention ]
The powder metallurgy sintering process is to press the mixed metal powder into a compact, perform high-temperature sintering and treatment at a temperature lower than the melting point of the main components of the material, and generate a series of complex physical and chemical changes at a certain temperature and in a protective atmosphere. The aim is to produce metallurgical bonding between powder particles, and to change the mechanical engagement between particles into the grain boundary bonding between atoms.
The long sliding block on the existing textile machine is sintered by using an old Fe-Cu-C process, and the result cannot reach the required hardness, strength and tensile strength, and the long sliding block has the disadvantages of too large deformation, difficult processing, quick abrasion and short service life.
[ summary of the invention ]
The invention aims to solve the technical problem of providing a powder metallurgy sintering process of a sliding block, which greatly improves the hardness, strength and tensile strength of a product and solves the problems of large deformation, difficult processing, quick abrasion of a long sliding block, short service life and the like in the prior art.
The invention is realized by the following steps:
a powder metallurgy sintering process of a sliding block comprises the following components in percentage by weight: 2-4% of Cu, 06-1.2% of C, 1-3% of Ni, the balance of Fe and no more than 2% of other additives;
the sintering process comprises a preheating section, a wax removing section and a sintering section; the preheating section and the wax removal section comprise three temperature sections which are respectively as follows: first-stage preheating-stage temperature: 560 ℃ plus 20 ℃; temperature of the second wax removal section: 720 +/-10 ℃; third-stage temperature: 900 plus or minus 10 ℃; the temperature of the sintering section is 1150 +/-10 ℃.
Further, the preheating section, the wax removing section and the sintering section are all carried out under the protective atmosphere conditions as follows: decomposing ammonia 4-7m3H, nitrogen gas 22m3/h～25m3/h。
Further, a cooling section is arranged behind the sintering section, and the product is cooled to room temperature under the condition of protective atmosphere.
Further, the residence time of the product in each section in the sintering process is as follows: wax removal section of 50 + -5 min, preheating section of 35 + -5 min, sintering section of 1.5h + -5 min, and cooling section of 1.5h + -5 min.
Further, the sintering process is carried out on a mesh belt sintering furnace.
The invention has the following advantages:
according to the invention, 1-3% of Ni is added into the original raw materials, and the Ni, Cu and Fe form a solid solution through high-temperature sintering, and the solid solution is activated and sintered to play a role in solid solution strengthening, so that the surface hardness and tensile strength of the sintered product are improvedAnd the elongation is greatly improved, namely the hardness of the product sintered by the invention is between 78 and 86, and the tensile strength is 55kg/mm2The elongation rate is more than 2.1, the method is obviously superior to the prior art, and the problems of large deformation, difficult processing, quick abrasion of the long-strip sliding block, short service life and the like in the prior art are solved.
[ detailed description ] embodiments
The invention relates to a powder metallurgy sintering process of a sliding block, which comprises the following components in percentage by weight: 2-4% of Cu, 06-1.2% of C, 1-3% of Ni, the balance of Fe and no more than 2% of other additives; after mixing, pressing into blank in a 200T press, and sintering on a mesh belt type sintering furnace in order, wherein the mesh belt speed is 5.5cm per minute.
The sintering process comprises a preheating section, a wax removing section and a sintering section; the preheating section and the wax removal section comprise three temperature sections which are respectively as follows: first-stage preheating-stage temperature: 560 ℃ plus 20 ℃; temperature of the second wax removal section: 720 +/-10 ℃; third-stage temperature: 900 plus or minus 10 ℃; the temperature of the sintering section is 1150 +/-10 ℃.
The preheating section, the wax removing section and the sintering section are all carried out under the protective atmosphere condition which is as follows: decomposing ammonia 4-7m3H, nitrogen gas 22m3/h～25m3/h。
And a cooling section is arranged behind the sintering section, and the product is cooled to room temperature under the condition of protective atmosphere, so that carbon black is prevented from being oxidized on the surface.
The staying time of the product in each section in the sintering process is as follows: wax removal section of 50 + -5 min, preheating section of 35 + -5 min, sintering section of 1.5h + -5 min, cooling section of 1.5h + -5 min, and total time of 4.5 hours.
The following is a parameter comparison between a test piece (serial number 1-5) produced by the prior art and a test piece (serial number 6-10) produced by the invention, wherein the raw materials of the prior sample comprise 2-4% of Cu, 06-1.2% of C, the balance of Fe and no more than 2% of other additives:
as can be seen from the above table, the hardness of the sintered product of the present invention is 78-86, and the tensile strength is 55kg/mm2The elongation is more than 2.1, which is obviously superior to the prior sintered test piece.
In conclusion, 1-3% of Ni is added into the original raw materials, Ni, Cu and Fe form a solid solution through high-temperature sintering, the solid solution is activated and sintered, the solid solution strengthening effect is achieved, the surface hardness, the tensile strength and the elongation of a product obtained through sintering are greatly improved, and the problems of large deformation, difficulty in processing, high abrasion speed of a long-strip sliding block, short service life and the like in the prior art are solved.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (5)
1. A powder metallurgy sintering process of a sliding block is characterized by comprising the following steps: the sliding block comprises the following components in percentage by weight: 2-4% of Cu, 06-1.2% of C, 1-3% of Ni, the balance of Fe and no more than 2% of other additives;
the sintering process comprises a preheating section, a wax removing section and a sintering section; the preheating section and the wax removal section comprise three temperature sections which are respectively as follows: first-stage preheating-stage temperature: 560 ℃ plus 20 ℃; temperature of the second wax removal section: 720 +/-10 ℃; third-stage temperature: 900 plus or minus 10 ℃; the temperature of the sintering section is 1150 +/-10 ℃.
2. The powder metallurgy sintering process of a slider according to claim 1, wherein: the preheating section, the wax removing section and the sintering section are all carried out under the protective atmosphere condition which is as follows: decomposing ammonia 4-7m3H, nitrogen gas 22m3/h～25m3/h。
3. The powder metallurgy sintering process of a slider according to claim 1 or 2, wherein: and a cooling section is arranged behind the sintering section, and the product is cooled to room temperature under the condition of protective atmosphere.
4. The powder metallurgy sintering process of a slider according to claim 3, wherein: the staying time of the product in each section in the sintering process is as follows: wax removal section of 50 + -5 min, preheating section of 35 + -5 min, sintering section of 1.5h + -5 min, and cooling section of 1.5h + -5 min.
5. The powder metallurgy sintering process of a slider according to claim 1, wherein: the sintering process is carried out on a mesh belt type sintering furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911220990.9A CN110760759A (en) | 2019-12-03 | 2019-12-03 | Powder metallurgy sintering process for sliding block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911220990.9A CN110760759A (en) | 2019-12-03 | 2019-12-03 | Powder metallurgy sintering process for sliding block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110760759A true CN110760759A (en) | 2020-02-07 |
Family
ID=69340796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911220990.9A Pending CN110760759A (en) | 2019-12-03 | 2019-12-03 | Powder metallurgy sintering process for sliding block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110760759A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2237029B (en) * | 1989-10-03 | 1994-01-05 | Hitachi Powdered Metals | Method of manufacturing sintered machine part |
| US6676894B2 (en) * | 2002-05-29 | 2004-01-13 | Ntn Corporation | Copper-infiltrated iron powder article and method of forming same |
| CN1631583A (en) * | 2004-12-24 | 2005-06-29 | 上海汽车股份有限公司 | Powder metallurgy manufacturing method of inside and outside rotor in oil pump |
| CN1681956A (en) * | 2002-09-30 | 2005-10-12 | 日本活塞环株式会社 | High-precision sintered cam lobe material |
| CN102071360A (en) * | 2011-01-14 | 2011-05-25 | 华南理工大学 | Tungsten carbide particle-enhanced iron-based powder metallurgy material and preparation method thereof |
| CN102689013A (en) * | 2012-06-06 | 2012-09-26 | 海安县鹰球集团有限公司 | High-toughness oil-retaining bearing for iron-base power metallurgy and manufacturing method thereof |
| CN107761003A (en) * | 2017-09-20 | 2018-03-06 | 上海汽车粉末冶金有限公司 | The powder metallurgy sintered method of bearing cap |
-
2019
- 2019-12-03 CN CN201911220990.9A patent/CN110760759A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2237029B (en) * | 1989-10-03 | 1994-01-05 | Hitachi Powdered Metals | Method of manufacturing sintered machine part |
| US6676894B2 (en) * | 2002-05-29 | 2004-01-13 | Ntn Corporation | Copper-infiltrated iron powder article and method of forming same |
| CN1681956A (en) * | 2002-09-30 | 2005-10-12 | 日本活塞环株式会社 | High-precision sintered cam lobe material |
| CN1631583A (en) * | 2004-12-24 | 2005-06-29 | 上海汽车股份有限公司 | Powder metallurgy manufacturing method of inside and outside rotor in oil pump |
| CN102071360A (en) * | 2011-01-14 | 2011-05-25 | 华南理工大学 | Tungsten carbide particle-enhanced iron-based powder metallurgy material and preparation method thereof |
| CN102689013A (en) * | 2012-06-06 | 2012-09-26 | 海安县鹰球集团有限公司 | High-toughness oil-retaining bearing for iron-base power metallurgy and manufacturing method thereof |
| CN107761003A (en) * | 2017-09-20 | 2018-03-06 | 上海汽车粉末冶金有限公司 | The powder metallurgy sintered method of bearing cap |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20200207 |