CN104028765B - A kind of production method of the metallic sintered products with installation through hole - Google Patents
A kind of production method of the metallic sintered products with installation through hole Download PDFInfo
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- CN104028765B CN104028765B CN201410300354.8A CN201410300354A CN104028765B CN 104028765 B CN104028765 B CN 104028765B CN 201410300354 A CN201410300354 A CN 201410300354A CN 104028765 B CN104028765 B CN 104028765B
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Abstract
The invention discloses a kind of metallic sintered products, suppressed forming by following powder stock formula: iron powder 100 weight portion, copper powder 1.8-2.2 weight portion, graphite powder 0.5-1.0 weight portion, nickel powder 2.0-3.0 weight portion, molybdenum powder 0.4-0.8 weight portion, micro mist wax 0.5-1.0 weight portion and calcirm-fluoride 0.5-1.0 weight portion.The invention also discloses a kind of production method of the metallic sintered products with installation through hole, the steps include: first fully to mix powder stock, then, the alloy iron-based mixed-powder be mixed to get is loaded in mould compressing, then obtain finished product after oversintering, machined boring, heat treatment, surface vibration grinding.This finished product has the advantages such as high accuracy, high strength, high rigidity, wearability be good, can be widely used in the manufacture of various bevel gear.
Description
Technical field
The present invention relates to field of powder metallurgy, be specifically related to the production method that the metallic sintered products of through hole installed by the band such as a kind of metallic sintered products and such as bevel gear.
Background technology
So-called metallic sintered products, refers to the finished product by mould, alloy iron-based mixed-powder being pressed into various shape.At present, for the bevel gear with installation through hole, mostly still adopt traditional machine-tooled method, not only production process is complicated, cost is high; And the finished product hardness obtained is low, wearability inadequate, substantially reduces the service life of bevel gear.
Summary of the invention
Technical problem to be solved by this invention is: provide the metallic sintered products that a kind of high accuracy, high strength, high rigidity, wearability are good.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: metallic sintered products, comprises following powder stock: water-atomized iron powder 100 weight portion, copper powder 1.8-2.2 weight portion, graphite powder 0.5-1.0 weight portion, nickel powder 2.0-3.0 weight portion, molybdenum powder 0.4-0.8 weight portion, micro mist wax 0.5-1.0 weight portion, calcirm-fluoride 0.5-1.0 weight portion.
Further technical problem to be solved by this invention is: the production method of the metallic sintered products of through hole installed by the band providing a kind of high accuracy, high strength, high rigidity, wearability good.
For solving above-mentioned further technical problem, the technical solution adopted in the present invention is: a kind of production method of the metallic sintered products with installation through hole, the steps include:
1) batch mixing: according to metallic sintered products of the present invention, take needed raw material, first loads the water-atomized iron powder of 40 ~ 60% in mixed powder machine, then, in mixed powder machine, add copper powder, nickel powder and molybdenum powder, then add remaining water-atomized iron powder in mixed powder machine, stir; Then graphite powder, micro mist wax and calcirm-fluoride are added in mixed powder machine, sieve after stirring, place at least 12 hours, obtain alloy iron-based mixed-powder;
2) suppress: by step 1) the alloy iron-based mixed-powder that obtains loads in mould, makes type at the pressure of 590 ~ 620Mpa;
3) sinter: compressing green compact are placed through in net belt sintering furnace, under the protection of the mist of hydrogen and nitrogen, guipure is advanced with the speed of 90 ~ 100 mm/second, first preheating section is passed through, temperature is 450 ~ 850 DEG C, time is no less than 45 minutes, by micro mist wax, graphite and binding agent burn off; Then, through high temperature section alloying, temperature is 1050 ~ 1150 DEG C, and the time is no less than 1 hour, finally, comes out of the stove through cooling section;
4) mechanical process;
5) heat treatment: the metallic sintered products after mechanical process is put into carburizer, carry out carbo-nitriding process, then, 850 ± 5 DEG C, insulation more than 2 hours under the condition of carbon potential 0.7 ± 0.1, then, metallic sintered products after quenching is sent in tempering furnace, is heated to 180 ~ 200 DEG C and carries out temper, be incubated more than 1 hour;
6) surface vibration grinding: metallic sintered products and grinding stone are put into oscillating mill, and puts into brightener and polishing agent, grind more than a hour, then successively through cleaning and immersion oil, obtains ganoid bevel gear.
In step 6) described in surface vibration grinding in, if the proportion of metallic sintered products is σ
1, the diameter of its through hole is D
1, be highly H1, the quality of metallic sintered products is G
1, the bulk density of the grinding stone that grinding adopts is σ
2, the quality of grinding stone is G
2, then
Described oscillating mill have employed spiral Rolling flow, three-D mode of vibration, and described metallic sintered products and corundum grinding stone are ground mutually.
Step 1) described in sieve adopt be 80 ~ 100 objects sieve.
Described hydrogen and the percent by volume of nitrogen are: 2.5 ~ 4:96 ~ 97.5.
Described grinding stone is corundum grinding stone.
The invention has the beneficial effects as follows: compared with traditional machined bevel gear, powder metallurgy bevel gear of the present invention, that the alloyed iron-based powder obtained after iron powder, copper powder, graphite powder, nickel powder, molybdenum powder, micro mist wax, calcirm-fluoride fully being mixed is obtaining finished product after compacting, sintering, machined, heat treatment and surface vibration milled processed, because have employed powder metallurgy processing technology, significantly reduce manufacturing cost, improve stock utilization and production efficiency.In addition, the present invention is when carrying out surface treatment to metallic sintered products, and the amount of the corundum grinding stone added is relatively more reasonable, so just while guarantee grinding effect, can put into metallic sintered products, to enhance productivity as much as possible more; In addition, the ratio of the mist of hydrogen and nitrogen is more moderate, the ratio of hydrogen is controlled between 2.5 ~ 4%, not only greatly reduce manufacturing cost (cost of manufacture of hydrogen is higher), and, even if reveal, meet naked light and also can not blast, so just make the security of mist obtain Reliable guarantee.
Detailed description of the invention
Below by embodiment, describe the pulp furnish of metallic sintered products of the present invention in detail, this proportioning is particularly useful for making the drive disk assemblies such as such as bevel gear.
Embodiment one:
Water-atomized iron powder 100 grams, copper powder 1.8 grams, graphite powder 0.5 gram, nickel powder 2.0 grams, molybdenum powder 0.4 gram, micro mist wax 0.5 gram, 0.5 gram, calcirm-fluoride.
Embodiment two:
Water-atomized iron powder 100 grams, copper powder 2 grams, graphite powder 0.75 gram, nickel powder 2.5 grams, molybdenum powder 0.6 gram, micro mist wax 0.75 gram, 0.75 gram, calcirm-fluoride.
Embodiment three:
Water-atomized iron powder 100 grams, copper powder 2.2 grams, graphite powder 1.0 grams, nickel powder 3.0 grams, molybdenum powder 0.8 gram, micro mist wax 1.0 grams, 1.0 grams, calcirm-fluoride.
Below for powder metallurgy bevel gear, describe the production method that the metallic sintered products of through hole installed by band of the present invention in detail, the steps include:
1) batch mixing: according to metallic sintered products of the present invention, take needed raw material, first loads the water-atomized iron powder of half in mixed powder machine, then, in mixed powder machine, add copper powder, nickel powder and molybdenum powder, then add second half water-atomized iron powder in mixed powder machine, stir; Then, graphite powder, micro mist wax and calcirm-fluoride are added in mixed powder machine, cross the sieve of 80 ~ 100 after stirring, then, place at least 12 hours, obtain alloy iron-based mixed-powder;
2) suppress: by step 1) the alloy iron-based mixed-powder that obtains loads in mould, makes type at the pressure of 590 ~ 620Mpa;
3) sinter: compressing green compact are placed through in net belt sintering furnace, under the ratio of hydrogen and nitrogen is the protection of 2.5 ~ 4:96 ~ 97.5 mist, guipure is advanced with the speed of 90 ~ 100 mm/second (mm/s), first preheating section is passed through, temperature is 450 ~ 850 DEG C, time is no less than 45 minutes, by micro mist wax, graphite and binding agent burn off; Then, through high temperature section alloying, temperature is 1050 ~ 1150 DEG C, and the time is no less than 1 hour, finally, comes out of the stove through cooling section;
4) mechanical process: the bevel gear that sinters loaded in frock, bores in the direction of radial direction and runs through aperture perpendicular to endoporus;
5) heat treatment: the bevel gear that machined is good puts into carburizer, carry out carbo-nitriding process, 850 ± 5 DEG C, insulation more than 2 hours under the condition of carbon potential 0.7 ± 0.1, then, with quenching oil cooling (quenching), bevel gear after quenching is sent in tempering furnace, is heated to 180 ~ 200 DEG C and carries out temper, be incubated more than 1 hour;
6) surface vibration grinding: the bevel gear good by heat treatment and corundum grinding stone put into the oscillating mill that have employed spiral Rolling flow, three-D mode of vibration, and put into brightener and polishing agent, grind more than one hour, then successively through cleaning and immersion oil, ganoid bevel gear is obtained;
Wherein, the addition of corundum grinding stone is calculated by following manner, if: the proportion of powder metallurgy bevel gear is σ
1, quality is G
1, its diameter installing through hole is D
1, be highly H1, the bulk density of corundum grinding stone is σ
2, quality is G
2, then
In sum, be only preferred embodiment of the present invention, not be used for limiting scope of the invention process, all equalizations done according to shape, structure, feature and the spirit described in the claims in the present invention scope change and modify, and all should be included in right of the present invention.
Claims (6)
1. a production method for the metallic sintered products with installation through hole, the steps include:
1) batch mixing: first according to the pulp furnish of water-atomized iron powder 100 weight portion, copper powder 1.8-2.2 weight portion, graphite powder 0.5-1.0 weight portion, nickel powder 2.0-3.0 weight portion, molybdenum powder 0.4-0.8 weight portion, micro mist wax 0.5-1.0 weight portion, calcirm-fluoride 0.5-1.0 weight portion, take needed raw material, first the water-atomized iron powder of 40 ~ 60% is loaded in mixed powder machine, then, copper powder, nickel powder and molybdenum powder is added in mixed powder machine, in mixed powder machine, add remaining water-atomized iron powder again, stir; Then graphite powder, micro mist wax and calcirm-fluoride are added in mixed powder machine, sieve after stirring, place at least 12 hours, obtain alloy iron-based mixed-powder;
2) suppress: alloy iron-based mixed-powder step 1) obtained loads in mould, makes type at the pressure of 590 ~ 620Mpa;
3) sinter: compressing green compact are placed through in net belt sintering furnace, under the protection of the mist of hydrogen and nitrogen, guipure is advanced with the speed of 90 ~ 100 mm/second, first preheating section is passed through, temperature is 450 ~ 850 DEG C, time is no less than 45 minutes, by micro mist wax, graphite and binding agent burn off; Then, through high temperature section alloying, temperature is 1050 ~ 1150 DEG C, and the time is no less than 1 hour, finally, comes out of the stove through cooling section;
4) mechanical process;
5) heat treatment: the metallic sintered products after mechanical process is put into carburizer, carry out carbo-nitriding process, then, 850 ± 5 DEG C, insulation more than 2 hours under the condition of carbon potential 0.7 ± 0.1, then, metallic sintered products after quenching is sent in tempering furnace, is heated to 180 ~ 200 DEG C and carries out temper, be incubated more than 1 hour;
6) surface vibration grinding: metallic sintered products and grinding stone are put into oscillating mill, and puts into brightener and polishing agent, grind more than a hour, then successively through cleaning and immersion oil, obtains ganoid bevel gear.
2. the production method of the metallic sintered products of through hole is installed according to the band described in claim 1, it is characterized in that: in the surface vibration grinding described in step 6), if the proportion of metallic sintered products is σ
1, the diameter of its through hole is D
1, be highly H1, the quality of metallic sintered products is G
1, the bulk density of the grinding stone that grinding adopts is σ
2, the quality of grinding stone is G
2, then
，2.5≤K≤3.5。
3. the production method of the metallic sintered products of through hole is installed according to the band described in claim 1, it is characterized in that: described oscillating mill have employed spiral Rolling flow, three-D mode of vibration, described metallic sintered products and grinding stone are ground mutually.
4. the production method of the metallic sintered products of through hole is installed according to the band described in claim 1, it is characterized in that: what sieving described in step 1) adopted is 80 ~ 100 object sieves.
5. the production method of the metallic sintered products of through hole is installed according to the band one of Claims 1-4 Suo Shu, it is characterized in that: described hydrogen and the percent by volume of nitrogen are: 2.5 ~ 4:96 ~ 97.5.
6. the production method of the metallic sintered products of through hole is installed according to the band one of Claims 1-4 Suo Shu, it is characterized in that: described grinding stone is corundum grinding stone.
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| CN104028765B true CN104028765B (en) | 2016-01-20 |
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| JP6395217B2 (en) * | 2014-12-12 | 2018-09-26 | 住友電工焼結合金株式会社 | Method for manufacturing sintered parts |
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| CN109513915A (en) * | 2018-11-27 | 2019-03-26 | 汪学军 | A kind of production method of metallic sintered products and the metallic sintered products with installation through-hole |
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Effective date of registration: 20210804 Address after: 215505 building 3, No. 18, Baitan Road, Changshu high tech Industrial Development Zone, Suzhou, Jiangsu (Zone D, Kuncheng Village Industrial Square) Patentee after: Jiangsu hongchuang Precision Manufacturing Co.,Ltd. Address before: 215611 Zhangjiagang Zhenjiang powder metallurgy products Co., Ltd., No. 307, Renmin East Road, Tangqiao town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee before: ZHANGJIAGANG ZHENJIANG POWDER METALLURGY PRODUCT Co.,Ltd. |