CN101927348A - Method for manufacturing pneumatic or electric tool taping block - Google Patents

Method for manufacturing pneumatic or electric tool taping block Download PDF

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Publication number
CN101927348A
CN101927348A CN2009101001439A CN200910100143A CN101927348A CN 101927348 A CN101927348 A CN 101927348A CN 2009101001439 A CN2009101001439 A CN 2009101001439A CN 200910100143 A CN200910100143 A CN 200910100143A CN 101927348 A CN101927348 A CN 101927348A
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temperature
sintering
minutes
heat treatment
chromium
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CN2009101001439A
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Chinese (zh)
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包崇玺
曹红斌
张静锋
郑财明
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NBTM New Materials Group Co Ltd
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NBTM New Materials Group Co Ltd
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Priority to CN2009101001439A priority Critical patent/CN101927348A/en
Publication of CN101927348A publication Critical patent/CN101927348A/en
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Abstract

The invention discloses a method for manufacturing a pneumatic or electric tool taping block, which sequentially comprises the following steps of: (1) preparing raw materials, namely mixed powder of iron, chromium, molybdenum, nickel, carbon and copper, and adding a lubricant with required content; (2) pressing the mixed powder on a press under the pressure of more than 600 MPa into bulk parts with the density of more than 7.3 g/cm<3>; (3) sintering, namely sintering the bulk parts in a vacuum sintering furnace at the temperature of between 1,100 and 1,350 DEG C for more than 10-30 minutes; and (4) performing heat treatment, namely determining a heat treatment process according to the chemical composition requirement of the sintered parts, keeping the quenching temperature of the heat treatment between 800 and 1,000 DEG C, keeping the temperature for 30 to 45 minutes, keeping the tempering temperature between 150 and 400 DEG C, and keeping the temperature for 110 to 130 minutes. Compared with the prior art, the method has the advantages of simple manufacturing process, high precision, good surface smoothness, effective elimination cracks of the mold easily generated in the forging process at high temperature, reduction of production cost and improvement of production efficiency, so the method is a manufacturing method worthy of popularization.

Description

A kind of manufacture method of pneumatic or electric tool taping block
Technical field
The present invention relates to the manufacture method of a kind of pneumatic tool taping block (HAMMER).
Background technology
System taping block general pneumatic or electric tool uses powder forging process or common contour forging technique.For powder forging process, compare with common die forging and to have the following advantages: (1) forming property height: because powder granule is thinner, when pouring mold cavity into, everywhere as fluid filling die cavity, forming property is high, so can both be shaped smoothly to the forging of different shape complexity.(2) mechanical property height: the fatigue strength of forging is increased to powder forging 340MPa from common forging part 290MPa.(3) forging precision height: because the heating-up temperature of forging is lower; and in anti-oxidation protective atmosphere, carry out again; there is not oxide skin, so can obtain the higher dimensional precision and than the forging of low surface roughness, the product surface under high pressure is subjected to the ironing of mold cavity smooth surface.Can compare from the measured data and the common forging part of a large amount of production power forging connecting rods.(4) stock utilization height: owing to adopt rational base technology, carry out the accurate closed die forging of non-trimming, no surplus more at a lower temperature, improved stock utilization greatly, be increased to more than 95% from the stock utilization of common die forging about 50%.(5) die life height: low and under the situation of non-scale, carry out closed die forging because of the heating-up temperature of powder blank, reduced friction to die surface, the more important thing is, unit pressure only is 1/3~1/4 of common die forging, even it is lower, this pressurized condition to mould is greatly improved, so its mould life-span can improve greatly.(6) production efficiency height: the common die forging blank after heating carries out the multiple tracks preforming roll forging, carries out blocking and finish-forging again on forcing press, and then cut edge, multiple working procedures such as large and small primary drying hole, thermal recalibration and cold-coining.And power forging has saved side cut, punching, forging correction and cold-coining operation, has improved production efficiency greatly.(7) product cost is low: compare with common swaging processing method, at first because the machining accuracy height can be saved machining significantly, improve stock utilization, to saving the man-hour and the very big economic benefit in aspect that reduces cost.Because raw material powder shared ratio height in cost, proof from produce, the part that can save machining more adopts power forging just favourable more.That is to say, original machining many more parts in man-hour, change power forging into after, save man-hour and reduce cost aspect just can obtain bigger effect more.
Power forging typically refers to powder sintered preform after heating, forges into the part forming process in closed mould.It is a kind of new technology that prior powder metallurgy and precision forging are combined, and both advantage held concurrently.Can produce the powder forging of density, overcome the low shortcoming of the metallurgical parts density of ordinary powder near materials theory density.Make some physics of powder forging and the level that mechanical property meets or exceeds common forgings, simultaneously, kept the advantage of the metallurgical few bits of ordinary powder, chipless technology again.By the appropriate design preform and carry out less, non-trimming forges, and has to be shaped accurately, the stock utilization height forges characteristics such as consuming little energy.The production cost of common die forging is higher, and stock utilization is lower.
But the problem that all relates to dimensional accuracy, surface roughness, production efficiency and cost aspect in two kinds of above-mentioned Forging Technologies.Forging process is owing at high temperature carry out, and mould easily produces be full of cracks, is easy to lose efficacy.Therefore the production cost of high-performance and high accuracy forging can be in any more, so its manufacture method awaits to improve.
Summary of the invention
Technical problem to be solved by this invention be provide at above-mentioned prior art present situation that a kind of precision height, intensity are big, technology simply, a kind of manufacture method of pneumatic or electric tool taping block cheaply.
The present invention solves the problems of the technologies described above the technical scheme that is adopted, and this manufacture method pneumatic or electric tool taping block is characterized in that: in turn include the following steps:
1. be ready to raw material, it is the mixed powder of iron, chromium, molybdenum, nickel, carbon and copper, its prescription is: iron is 84.5~99.8%, and carbon is 0.1~1.0%, and chromium is 0~5.0%, molybdenum is 0~1.5%, nickel content is 0~4%, and copper content is 0~3%, wherein, chromium, molybdenum, copper, nickel add with ferroalloy or foundry alloy form, add content then and be 0.1~1% lubricant;
2. above-mentioned mixed powder is pressed into density greater than 7.3g/cm on the press of pressure greater than 600MPa 3Block part;
3. sintering carries out sintering with this block part in 1100 ℃~1350 ℃ of temperature, the time of sintering is 10~30 minutes, and sintering carries out in vacuum sintering furnace or nitrogen carries out in the sintering furnace of 1~75vol% for the ratio of basis, hydrogen
4. heat treatment according to the chemical composition requirement of sintered part(s), is determined Technology for Heating Processing, and the heat-treatment quenching temperature is 800~1000 ℃, is incubated 30~45 minutes, and temperature is 150~400 ℃, is incubated 110~130 minutes.
Above-mentioned percentage is mass percent.
As improvement, the lubricant of described step in 1. is preferably wax.
Compacting described in the improvement again, described step 2. can adopt warm-pressing formation or mold heated to be shaped.
Improve, 5. 4. described step after the heat treatment, also can increase step, is about to after the heat treatment part be carried out bead, with the fatigue strength and the superficial density of further raising product again.
After the improvement again, described step 5., also can increase step and 6. carry out face machined flat, promptly grind according to the requirement of height, flatness and the depth of parallelism.
Compared with prior art, the invention has the advantages that manufacture craft is simple, have the precision height, surface flatness is good, mould easily produces the difficult problem of be full of cracks owing at high temperature carry out to have eliminated forging process effectively, thereby has reduced production cost, has improved production efficiency.Therefore be the manufacture method that is worthy to be popularized.
The specific embodiment
Below in conjunction with embodiment the present invention is described in further detail, following percentage is mass percent;
Embodiment one, and the manufacture method of the pneumatic or electric tool taping block of present embodiment in turn includes the following steps:
1. be ready to raw material, i.e. the mixed powder of iron and carbon, its prescription is: iron is 99.8%: carbon is 0.1%, adds content then and be 0.1% wax;
2. above-mentioned mixed powder is pressed into density greater than 7.3g/cm on the press of pressure greater than 600MPa 3Block part; Compacting can adopt warm-pressing formation, mold heated to be shaped.
3. sintering carries out sintering with this block part in 1100 ℃ of temperature, the time of sintering is more than 10 minutes, and sintering carries out in vacuum sintering furnace or nitrogen carries out in the sintering furnace of 10vol% for the ratio of basis, hydrogen;
4. heat treatment according to the chemical composition requirement of sintered part(s), is determined Technology for Heating Processing, and the heat-treatment quenching temperature is 800 ℃, is incubated 30 minutes, and temperature is 200 ℃, is incubated 130 minutes.
Embodiment two, and the manufacture method of the pneumatic or electric tool taping block of present embodiment in turn includes the following steps:
1. be ready to raw material, i.e. the mixed powder of iron, chromium, carbon and copper, its prescription is: iron is: 99.1%: carbon is: 0.2%, chromium is 0.2%, adds content then and be 0.5% wax;
2. above-mentioned mixed powder is pressed into density greater than 7.3g/cm on the press of pressure greater than 600MPa 3Block part; Compacting can adopt warm-pressing formation, mold heated to be shaped.
3. sintering carries out sintering with this block part in 1350 ℃ of temperature, the time of sintering is more than 12 minutes, and sintering carries out in vacuum sintering furnace or nitrogen carries out in the sintering furnace of 10vol% for the ratio of basis, hydrogen;
4. heat treatment according to the chemical composition requirement of sintered part(s), is determined Technology for Heating Processing, and the heat-treatment quenching temperature is 900 ℃, is incubated 35 minutes, and temperature is 300 ℃, is incubated 120 minutes.
5., be about to after the heat treatment part be carried out bead, with the fatigue strength and the superficial density of further raising product.
Embodiment three, and the manufacture method of the pneumatic or electric tool taping block of present embodiment in turn includes the following steps:
1. be ready to raw material, it is the mixed powder of iron, chromium, molybdenum, nickel, carbon and copper, its prescription is: iron is 84.5%: carbon is 1.0%, chromium is 5.0%, and molybdenum is 1.5%, and nickel content is 4%, copper content is 3%, wherein, chromium, molybdenum, copper, nickel add with ferroalloy or foundry alloy form, add content then and be 1% wax;
2. above-mentioned mixed powder is pressed into density greater than 7.3g/cm on the press of pressure greater than 600MPa 3Block part; Compacting can adopt warm-pressing formation, mold heated to be shaped.
3. sintering carries out sintering with this block part in 1350 ℃ of temperature, the time of sintering is more than 30 minutes, and sintering carries out in vacuum sintering furnace or nitrogen carries out in the sintering furnace of 15vol% for the ratio of basis, hydrogen;
4. heat treatment according to the chemical composition requirement of sintered part(s), is determined Technology for Heating Processing, and the heat-treatment quenching temperature is 1000 ℃, is incubated 45 minutes, and temperature is 400 ℃, is incubated 130 minutes.
5., be about to after the heat treatment part be carried out bead, with the fatigue strength and the superficial density of further raising product.
6. carry out face machined flat, promptly grind according to the requirement of height, flatness and the depth of parallelism.
Embodiment four, and the manufacture method of the pneumatic or electric tool taping block of present embodiment in turn includes the following steps:
1. be ready to raw material, i.e. the mixed powder of iron, chromium, molybdenum, nickel, carbon and copper, its prescription is: iron is 92%: carbon is 1%, and chromium is 2%, and molybdenum is 1%, and nickel content is 2%, copper content is 1%, adds content then and be 1% wax;
2. above-mentioned mixed powder is pressed into density greater than 7.3g/cm on the press of pressure greater than 600MPa 3Block part; Compacting can adopt warm-pressing formation, mold heated to be shaped.
3. sintering carries out sintering with this block part in 1300 ℃ of temperature, the time of sintering is more than 25 minutes, and sintering carries out in vacuum sintering furnace or nitrogen carries out in the sintering furnace of 10vol% for the ratio of basis, hydrogen;
4. heat treatment according to the chemical composition requirement of sintered part(s), is determined Technology for Heating Processing, and the heat-treatment quenching temperature is 1000 ℃, is incubated 45 minutes, and temperature is 400 ℃, is incubated 120 minutes.
6. carry out face machined flat, promptly grind according to the requirement of height, flatness and the depth of parallelism.
Embodiment five, and the manufacture method of the pneumatic or electric tool taping block of present embodiment in turn includes the following steps:
1. be ready to raw material, i.e. the mixed powder of iron, chromium, molybdenum, nickel, carbon and copper, its prescription is: iron is 90%: carbon is 0.5%, and chromium is 0.5%, and molybdenum is 1.5%, and nickel content is 3.5%, copper content is 3%, adds content then and be 1% wax;
2. above-mentioned mixed powder is pressed into density greater than 7.3g/cm on the press of pressure greater than 600MPa 3Block part; Compacting can adopt warm-pressing formation, mold heated to be shaped.
3. sintering carries out sintering with this block part in 1100 ℃ of temperature, the time of sintering is more than 20 minutes, and sintering carries out in vacuum sintering furnace or nitrogen carries out in the sintering furnace of 10vol% for the ratio of basis, hydrogen;
4. heat treatment according to the chemical composition requirement of sintered part(s), is determined Technology for Heating Processing, and the heat-treatment quenching temperature is 950 ℃, is incubated 40 minutes, and temperature is 350 ℃, is incubated 115 minutes.
5. be about to after the heat treatment part be carried out bead, with the fatigue strength and the superficial density of further raising product.
6. carry out face machined flat, promptly grind according to the requirement of height, flatness and the depth of parallelism.

Claims (5)

1. the manufacture method of a pneumatic or electric tool taping block is characterized in that: in turn include the following steps:
1. be ready to raw material, it is the mixed powder of iron, chromium, molybdenum, nickel, carbon and copper, its prescription is: iron is 84.5~99.8%, and carbon is 0.1~1.0%, and chromium is 0~5.0%, molybdenum is 0~1.5%, nickel content is 0~4%, and copper content is 0~3%, wherein, chromium, molybdenum, copper, nickel add with ferroalloy or foundry alloy form, add content then and be 0.1~1% lubricant;
2. above-mentioned mixed powder is pressed into density greater than 7.3g/cm on the press of pressure greater than 600MPa 3Block part;
3. sintering carries out sintering with this block part in 1100 ℃~1350 ℃ of temperature, the time of sintering is 10~30 minutes, and sintering carries out in vacuum sintering furnace or nitrogen carries out in the sintering furnace of 1~75vol% for the ratio of basis, hydrogen;
4. heat treatment according to the chemical composition requirement of sintered part(s), is determined Technology for Heating Processing, and the heat-treatment quenching temperature is 800~1000 ℃, is incubated 30~45 minutes, and temperature is 150~400 ℃, is incubated 110~130 minutes;
Above-mentioned percentage is mass percent.
2. the system method of making according to claim 1 is characterized in that: the lubricant of described step in 1. is wax.
3. the system method of making according to claim 1 is characterized in that: the compacting of described step described in 2. adopts mold heated to be shaped.
4. according to claim 1 or the 2 or 3 described system methods of making, it is characterized in that: 5. 4. described step after the heat treatment, also can increase step, is about to after the heat treatment part be carried out bead, with the fatigue strength and the superficial density of further raising product.
5. the system method of making according to claim 4 is characterized in that: described step 5. after, also can increase step and 6. carry out face machined flat, promptly grind according to the requirement of height, flatness and the depth of parallelism.
CN2009101001439A 2009-06-24 2009-06-24 Method for manufacturing pneumatic or electric tool taping block Pending CN101927348A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102909372A (en) * 2011-08-03 2013-02-06 东睦新材料集团股份有限公司 Manufacturing method for valve plate of compressor
CN102921943A (en) * 2012-10-30 2013-02-13 南通金巨霸机械有限公司 Powder metallurgy mechanical part production process
CN104972127A (en) * 2015-07-02 2015-10-14 东睦新材料集团股份有限公司 Method for preparing powder metallurgy striking block
CN105436506A (en) * 2014-09-25 2016-03-30 东睦新材料集团股份有限公司 Method for manufacturing powder metallurgy support
CN105499580A (en) * 2014-09-25 2016-04-20 东睦新材料集团股份有限公司 Manufacturing method for powder metallurgical cylinder
CN105499579A (en) * 2014-09-25 2016-04-20 东睦新材料集团股份有限公司 Manufacturing method for powder metallurgy supporting base
CN105499581A (en) * 2014-09-25 2016-04-20 东睦新材料集团股份有限公司 Production method of powder metallurgy cylinder block
CN112576507A (en) * 2019-09-27 2021-03-30 安徽美芝精密制造有限公司 Manufacturing method of compressor piston and compressor piston

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102909372A (en) * 2011-08-03 2013-02-06 东睦新材料集团股份有限公司 Manufacturing method for valve plate of compressor
CN102909372B (en) * 2011-08-03 2015-03-18 东睦新材料集团股份有限公司 Manufacturing method for valve plate of compressor
CN102921943A (en) * 2012-10-30 2013-02-13 南通金巨霸机械有限公司 Powder metallurgy mechanical part production process
CN105499579A (en) * 2014-09-25 2016-04-20 东睦新材料集团股份有限公司 Manufacturing method for powder metallurgy supporting base
CN105436506A (en) * 2014-09-25 2016-03-30 东睦新材料集团股份有限公司 Method for manufacturing powder metallurgy support
CN105499580A (en) * 2014-09-25 2016-04-20 东睦新材料集团股份有限公司 Manufacturing method for powder metallurgical cylinder
CN105499579B (en) * 2014-09-25 2018-04-27 东睦新材料集团股份有限公司 A kind of manufacture method of powder metallurgy support
CN105499581A (en) * 2014-09-25 2016-04-20 东睦新材料集团股份有限公司 Production method of powder metallurgy cylinder block
CN105499580B (en) * 2014-09-25 2018-04-03 东睦新材料集团股份有限公司 A kind of manufacture method of powder metallurgy cylinder body
CN105436506B (en) * 2014-09-25 2018-04-06 东睦新材料集团股份有限公司 A kind of manufacture method of powder metallurgy support
CN105499581B (en) * 2014-09-25 2018-04-27 东睦新材料集团股份有限公司 A kind of manufacture method of powder metallurgy cylinder body
CN104972127A (en) * 2015-07-02 2015-10-14 东睦新材料集团股份有限公司 Method for preparing powder metallurgy striking block
CN112576507A (en) * 2019-09-27 2021-03-30 安徽美芝精密制造有限公司 Manufacturing method of compressor piston and compressor piston

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