CN103266271B - A kind of powder metallurgy prescription and technique - Google Patents
A kind of powder metallurgy prescription and technique Download PDFInfo
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- CN103266271B CN103266271B CN201310208088.1A CN201310208088A CN103266271B CN 103266271 B CN103266271 B CN 103266271B CN 201310208088 A CN201310208088 A CN 201310208088A CN 103266271 B CN103266271 B CN 103266271B
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Abstract
The present invention proposes a kind of powder metallurgy prescription and technique, its raw material composition comprises: water-atomized iron powder is 48% to 88%, reduced iron powder is 10% to 50%, Graphite Powder 99 is 0.4% to 1.5%, electrolytic copper is 1% to 3.9%, and micro mist wax is 0.3% to 1.5%, and Cutting free agent is 0.1% to 0.9%, toughener is 0.1% to 0.9%, and the processing step through mixing, compacting, sintering, finishing, deburring, steam treatment is made.Invention increases tensile strength and the hardness of product, by Optimization Technology step, improve production efficiency, decrease the waste of the energy.
Description
Technical field
The present invention relates to field of powder metallurgy, refer to a kind of powder metallurgy prescription and technique especially.
Background technology
Powder metallurgy be produce metal or with metal-powder as raw material, through being shaped and sintering, manufacture the Technology of metallic substance, matrix material and all kinds goods.Due to the advantage of powder metallurgy technology, it has become the key solving novel material problem, plays a part very important in the development of novel material.But existing powder metallurgy prescription and technique still have limitation, processing step is various result in the waste of the energy and the low of production efficiency, and simultaneously product also also exists tensile strength and the lower problem of hardness.
Summary of the invention
The present invention proposes a kind of powder metallurgy prescription, solves the problem that product tensile strength and hardness in prior art are lower.
The present invention proposes a kind of technique of powder metallurgy prescription, solves the energy dissipation that causes because processing step is various in prior art and the low problem of production efficiency.
Technical scheme of the present invention is achieved in that
A kind of powder metallurgy prescription, by water-atomized iron powder, reduced iron powder, Graphite Powder 99, electrolytic copper, micro mist wax, Cutting free agent and toughener Homogeneous phase mixing iron-based powder, in described iron-based powder, be measure unit by weight, described water-atomized iron powder is 48% to 88%, reduced iron powder is 10% to 50%, Graphite Powder 99 is 0.4% to 1.5%, and electrolytic copper is 1% to 3.9%, and micro mist wax is 0.3% to 1.5%, Cutting free agent is 0.1% to 0.9%, and toughener is 0.1% to 0.9%.
Preferably, described water-atomized iron powder is 48%, and reduced iron powder is 50%, and Graphite Powder 99 is 0.4%, and electrolytic copper is 1%, and micro mist wax is 0.3%, and Cutting free agent is 0.2%, and toughener is 0.1%.
Preferably, described water-atomized iron powder is 88%, and reduced iron powder is 10%, and Graphite Powder 99 is 0.4%, and electrolytic copper is 1%, and micro mist wax is 0.3%, and Cutting free agent is 0.1%, and toughener is 0.2%.
Preferably, described water-atomized iron powder is 68%, and reduced iron powder is 23.3%, and Graphite Powder 99 is 1.5%, and electrolytic copper is 3.9%, and micro mist wax is 1.5%, and Cutting free agent is 0.9%, and toughener is 0.9%.
Preferably, described water-atomized iron powder is 61.3%, and reduced iron powder is 30%, and Graphite Powder 99 is 1.5%, and electrolytic copper is 3.9%, and micro mist wax is 1.5%, and Cutting free agent is 0.9%, and toughener is 0.9%.
The present invention also also discloses a kind of technique of powder metallurgy prescription, and its processing step comprises:
Mixing step: by described iron-based powder by described water-atomized iron powder, reduced iron powder, Graphite Powder 99, electrolytic copper, micro mist wax, Cutting free agent and toughener proportioning Homogeneous phase mixing;
Pressing step: the described iron-based powder mixed is put into press, is completed by press and described iron-based powder is sent into the product mold preset, and be pressed into product blank;
Sintering step: product blank is inserted transmission guipure, transmits guipure and sends into sintering oven according to the speed of setting, sinter described product blank into semi-finished articles;
Correction step: described semi-finished articles is put into shaping mould and carries out fine correction, makes described semi-finished articles meet the requirements of tolerance zone;
Deburring step: by orthopedic semi-finished articles through shot-peening deburring operation, carry out deburring process;
Steaming step: by semi-finished articles steam treatment described after deburring, makes described semi-finished articles surface form tight zone.
Preferably, the time of described mixing step is 60 to 100 minutes, becomes powder formulation successively after described iron-based powder proportioning after bipyramid batch mixing bucket batch mixing, 2 layer of 80 mesh sieve and conjunction are criticized.
Preferably, the time of described sintering step is 2.5 to 5 hours, and described sintering step first uses electrically heated preheating, and preheating temperature is 600 DEG C to 900 DEG C, and sintering temperature is 1120 DEG C.
Compared with prior art, present invention employs a kind of powder metallurgy prescription and technique, by water-atomized iron powder, reduced iron powder, Graphite Powder 99, electrolytic copper, micro mist wax, Cutting free agent and toughener Homogeneous phase mixing iron-based powder, and, in above-mentioned iron-based powder, be measure unit by weight, water-atomized iron powder is 48% to 88%, reduced iron powder is 10% to 50%, Graphite Powder 99 is 0.4% to 1.5%, electrolytic copper is 1% to 3.9%, micro mist wax is 0.3% to 1.5%, Cutting free agent is 0.1% to 0.9%, toughener is the proportioning mode of 0.1% to 0.9%, improve tensile strength and the hardness of product.Meanwhile, by Optimization Technology step, improve production efficiency, decrease the waste of the energy.
List below lists formula of the present invention and conventional powder metallurgy prescription and the contrast of straight iron powder in tensile strength and hardness, and as can be seen from table, after adopting powder metallurgy prescription of the present invention, the tensile strength of product and hardness obtain significant raising.
Embodiment
Below in conjunction with specific embodiments of the invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment:
Present invention process step comprises:
Mixing step: by described iron-based powder by described water-atomized iron powder, reduced iron powder, Graphite Powder 99, electrolytic copper, micro mist wax, Cutting free agent and toughener proportioning Homogeneous phase mixing, after bipyramid batch mixing bucket batch mixing, 2 layer of 80 mesh sieve and conjunction are criticized, become powder formulation successively by after iron-based powder proportioning, the time of whole mixing step is 100 minutes.
Pressing step: the iron-based powder that mixes is sent into press top, automatically suppress in the die cavity adding mould by adding powder box, the speed per minute of compacting 7, then delivers in rotating disk with mechanical manipulator.
Sintering step: net strip sintering furnace sinters, enter from opening for feed and use stainless steel mesh-belt conveying, the time is needed to be 3 hours by discharge hole for discharge, it is 650 DEG C by electrically heated preheating temperature, sintering temperature is 1120 DEG C, interior H2 and N2 of burner hearth makes shielding gas, its object is the oxygen in H2 reduced iron base product, N2 is used as shielding gas, N2 makes product not oxidized, the making of H2 take liquefied ammonia as raw material, heat 800 DEG C under the effect of nickel accelerant, be decomposed into hydrogen and 25% nitrogen of 75%, the making of nitrogen take pressurized air as raw material, adsorbed by carbonaceous molecular sieve, air separation is become nitrogen and oxygen, oxygen is discharged to outdoor automatically, nitrogen is through purifying, as shielding gas.Powder metallurgy product obtain the material of some strength through oversintering, and hydrogen burns at two of stove.
Correction step: have distortion to a certain degree after requiring high product sintering, need ensure form and position tolerance by shaping, shaping device is the oil press of 200 tons or 100 tons, and press has sizing die frame, product is put into sizing die and is corrected, thus makes product reach requirement tolerance zone.
Deburring step: comprise shot-peening, vibration, artificial deburring, shot-peening deburring is exactly product is poured in sandblast machine spray to product by the certain jet velocity of stainless shot, product rolls and burr spray on product is fallen on string rubber.Vibrator deburring, the product of some amount and a certain proportion of abrasive material are poured in vibration trough jointly and vibrates, after 30 minutes, take out product and abrasive material separately, artificial deburring is exactly with drilling machine, the burr on product aperture limit is removed.
Steaming step: product puts into iron basket, hang in steam treatment stove, be heated to 530 ~ 580 DEG C with resistance wire, be incubated 7 hours, pass into oversaturated water vapor, iron and water vapor react, and generate Z 250 and hydrogen, the product surface densification after steam treatment is not easily got rusty, can't leak gas, water vapor has special steam generating stove supply, and after automatic watering to certain pressure, automatic cut-off power insulation, simple to operate.
In above-mentioned, following preferred embodiment can also be adopted about powder metallurgy prescription of the present invention:
Embodiment 1: power formulations of the present invention is as follows: in iron-based powder, be measure unit by weight, water-atomized iron powder is 48%, reduced iron powder is 50%, and Graphite Powder 99 is 0.4%, and electrolytic copper is 1%, micro mist wax is 0.3%, and Cutting free agent is 0.2%, and toughener is 0.1%.
Embodiment 2: power formulations of the present invention is as follows: in iron-based powder, be measure unit by weight, water-atomized iron powder is 88%, reduced iron powder is 10%, and Graphite Powder 99 is 0.4%, and electrolytic copper is 1%, micro mist wax is 0.3%, and Cutting free agent is 0.1%, and toughener is 0.2%.
Embodiment 3: power formulations of the present invention is as follows: in iron-based powder, be measure unit by weight, water-atomized iron powder is 68%, reduced iron powder is 23.3%, and Graphite Powder 99 is 1.5%, and electrolytic copper is 3.9%, micro mist wax is 1.5%, and Cutting free agent is 0.9%, and toughener is 0.9%.
Embodiment 4: power formulations of the present invention is as follows: in iron-based powder, be measure unit by weight, water-atomized iron powder is 61.3%, reduced iron powder is 30%, and Graphite Powder 99 is 1.5%, and electrolytic copper is 3.9%, micro mist wax is 1.5%, and Cutting free agent is 0.9%, and toughener is 0.9%.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the raw material of a powder metallurgy, it is characterized in that: by water-atomized iron powder, reduced iron powder, Graphite Powder 99, electrolytic copper, micro mist wax, Cutting free agent and toughener Homogeneous phase mixing iron-based powder, in described iron-based powder, be measure unit by weight, described water-atomized iron powder is 48% to 88%, reduced iron powder is 10% to 50%, Graphite Powder 99 is 0.4% to 1.5%, and electrolytic copper is 1% to 3.9%, and micro mist wax is 0.3% to 1.5%, Cutting free agent is 0.1% to 0.9%, and toughener is 0.1% to 0.9%.
2. the raw material of a kind of powder metallurgy according to claim 1, is characterized in that: described water-atomized iron powder is 48%, and reduced iron powder is 50%, and Graphite Powder 99 is 0.4%, and electrolytic copper is 1%, and micro mist wax is 0.3%, and Cutting free agent is 0.2%, and toughener is 0.1%.
3. the raw material of a kind of powder metallurgy according to claim 1, is characterized in that: described water-atomized iron powder is 88%, and reduced iron powder is 10%, and Graphite Powder 99 is 0.4%, and electrolytic copper is 1%, and micro mist wax is 0.3%, and Cutting free agent is 0.1%, and toughener is 0.2%.
4. the raw material of a kind of powder metallurgy according to claim 1, is characterized in that: described water-atomized iron powder is 68%, and reduced iron powder is 23.3%, and Graphite Powder 99 is 1.5%, and electrolytic copper is 3.9%, and micro mist wax is 1.5%, and Cutting free agent is 0.9%, and toughener is 0.9%.
5. the raw material of a kind of powder metallurgy according to claim 1, is characterized in that: described water-atomized iron powder is 61.3%, and reduced iron powder is 30%, and Graphite Powder 99 is 1.5%, and electrolytic copper is 3.9%, and micro mist wax is 1.5%, and Cutting free agent is 0.9%, and toughener is 0.9%.
6. prepare a technique for powder metallurgy based on the raw material described in any one of claim 1 to 5, its processing step comprises: mixing step: by described iron-based powder by described water-atomized iron powder, reduced iron powder, Graphite Powder 99, electrolytic copper, micro mist wax, Cutting free agent and toughener proportioning Homogeneous phase mixing; Pressing step: the described iron-based powder mixed is put into press, is completed by press and described iron-based powder is sent into the product mold preset, and be pressed into product blank; Sintering step: product blank is inserted transmission guipure, transmits guipure and sends into sintering oven according to the speed of setting, sinter described product blank into semi-finished articles; Correction step: described semi-finished articles is put into shaping mould and carries out fine correction, makes described semi-finished articles meet the requirements of tolerance zone; Deburring step: by orthopedic semi-finished articles through shot-peening deburring operation, carry out deburring process; Steaming step: by semi-finished articles steam treatment described after deburring, makes described semi-finished articles surface form tight zone.
7. the technique preparing powder metallurgy according to claim 6, it is characterized in that: the time of described mixing step is 60 to 100 minutes, after described iron-based powder proportioning, after bipyramid batch mixing bucket batch mixing, 2 layer of 80 mesh sieve and conjunction are criticized, become powder formulation successively.
8. the technique preparing powder metallurgy according to claim 7, is characterized in that: the time of described sintering step is 2.5 to 5 hours, and described sintering step first uses electrically heated preheating, and preheating temperature is 600 DEG C to 900 DEG C, and sintering temperature is 1120 DEG C.
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| CN107695335A (en) * | 2017-08-24 | 2018-02-16 | 南通冠达粉末冶金有限公司 | A kind of powder metallurgy prescription and its metallurgical forming method |
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| CN112453387A (en) * | 2020-11-27 | 2021-03-09 | 深圳市日东科技发展有限公司 | Powder metallurgy-based high-density stainless steel product formula and process thereof |
| CN112792337A (en) * | 2020-12-29 | 2021-05-14 | 广东东睦新材料有限公司 | Production process of micro compressor cylinder body |
| CN113333740A (en) * | 2021-06-17 | 2021-09-03 | 德钜（厦门）特种合金制品有限公司 | Powder metallurgy formula and preparation method of high-power commercial vehicle water pump hub |
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