CN103008642B - The valve rod powder metallurgy manufacture method of check-valves - Google Patents
The valve rod powder metallurgy manufacture method of check-valves Download PDFInfo
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- CN103008642B CN103008642B CN201210482111.1A CN201210482111A CN103008642B CN 103008642 B CN103008642 B CN 103008642B CN 201210482111 A CN201210482111 A CN 201210482111A CN 103008642 B CN103008642 B CN 103008642B
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Abstract
The invention discloses the valve rod powder metallurgy manufacture method of check-valves, it is characterized in that, include following steps, a, select following powder stock powder metallurgy once compressing obtained valve rod, its percentage by weight is: surplus is ferrous alloy powder; Carbon: 0.3 ~ 1.2%; Tree ash: 0.2-1.4%; Copper: 0.7 ~ 2.4%; Manganese sulfide: 0.1 ~ 0.5%; Zinc stearate: 0.3 ~ 1.2%; The present invention, based on powdered alloy steel, can improve metal parts intensity, corrosion resistance, wearability and reduce the powdered metallurgical material of manufacturing cost.
Description
Technical field
The present invention relates to the valve rod powder metallurgy manufacture method of check-valves.
Background technology
PM technique, with the parts of the shape production requirement high dimensional accuracy extremely close with article shape, complicated shape, can reduce cutting cost significantly.Therefore, sintered metal product as various machinery, device parts and utilize in many-side.
Generally speaking, the alloy powder such as mixing graphite powder and the lubricant powder such as stearic acid, zinc stearate in iron-based powder and after forming iron-based powder mixed powder, this iron-based powder mixed powder is filled into metal die, press molding and the metallurgy iron-based powder formed body (powder compact) that makes powder.Wherein, iron-based powder can be divided into iron powder (straight iron powder etc.), powdered alloy steel etc. according to composition.Further, iron-based powder also can be divided into atomized iron powder, reduced iron powder etc. according to manufacture method.The density of iron-based powder formed body is generally 6.671Mg/m
3.Further sintering processes implemented for these iron-based powder formed bodies and forms sintered body, and implementing finishing, machining and form sintered metal product as required.Further, when needing to improve hot strength, fatigue strength, after sintering, carburizing heat treatment, brightness heat treatment is also implemented.At present, the iron-base powder metallurgy material that China commonly uses closes the non-ferrous metal having copper, nickel etc. more valuable, and cost is higher, and intensity and wearing no resistance, product's dimensional precision is difficult to control.
Summary of the invention
Object of the present invention provides a kind of valve rod powder metallurgy manufacture method of check-valves, a kind of based on powdered alloy steel, metal parts intensity, corrosion resistance, wearability and reduce the powdered metallurgical material of manufacturing cost can be improved.
The technical solution adopted in the present invention is:
The valve rod powder metallurgy manufacture method of check-valves, includes following steps,
A, select following powder stock powder metallurgy once compressing obtained valve rod, its percentage by weight is: surplus is ferrous alloy powder; Carbon: 0.3 ~ 1.2%; Tree ash: 0.2-1.4%; Copper: 0.7 ~ 2.4%; Manganese sulfide: 0.1 ~ 0.5%; Zinc stearate: 0.3 ~ 1.2%;
B, sinter molding being obtained valve rod goods, to put into 20 ~ No. 30 machine oil soak times be 2-3 hour, then carry out water atomization steam treatment, and the processing time is 3-5 hour, and temperature is 550-650 DEG C;
C, heat treatment: first carry out normalized treatment, be incubated 1-2 hour by the valve rod after steam treatment at 665-775 DEG C, carries out Quenching Treatment again after taking-up: send in heat-treatment furnace and be heated to 540-680 DEG C, and be incubated 2-3 hour; Then, with quenching oil cooling, finally temper is carried out: sent in tempering furnace by the valve rod after quenching and be heated to 350-450 DEG C, insulation 50-70min;
D, phosphorating treatment, at 100-150 DEG C, pH value is adopted to be that the surface conditioner of 8 is to valve rod process 1min, after dripping empty 1-2min, adopt bonderite process 15-20min again, then after dripping empty 1-2min, adopt clean water 1-2min, after dripping empty 1-2min again, process 0.5-1min with hot water valve rod being placed in 78-100 DEG C;
E, subzero treatment: the valve rod after phosphorating treatment is loaded container, and add liquid nitrogen and carry out subzero treatment, the time is 11-12 hour;
F, nitrogen treatment: the valve rod after subzero treatment is loaded container, and carry out nitrogen treatment, temperature controls at 550-580 DEG C, and the time is 3-5h.
Described step a, select following powder stock powder metallurgy once compressing obtained valve rod, its percentage by weight is: surplus is ferrous alloy powder; Carbon: 0.8%; Tree ash: 1.1%; Copper: 1.3%; Manganese sulfide: 0.3%; Zinc stearate: 0.8%.
The invention has the beneficial effects as follows:
Using powdered alloy steel as main body, do not utilize special sintering circuit can maintain the density of higher sintered body yet, can not only hot strength be improved, can also bending fatigue strength be improved.
Through detecting, Testing index of the present invention is as follows:
。
Detailed description of the invention
The valve rod powder metallurgy manufacture method of check-valves, includes following steps,
A, select following powder stock powder metallurgy once compressing obtained valve rod, its percentage by weight is: surplus is ferrous alloy powder; Carbon: 0.8%; Tree ash: 1.1%; Copper: 1.3%; Manganese sulfide: 0.3%; Zinc stearate: 0.8%;
B, sinter molding being obtained valve rod goods, to put into 20 ~ No. 30 machine oil soak times be 2-3 hour, then carry out water atomization steam treatment, and the processing time is 3-5 hour, and temperature is 550-650 DEG C;
C, heat treatment: first carry out normalized treatment, be incubated 1-2 hour by the valve rod after steam treatment at 665-775 DEG C, carries out Quenching Treatment again after taking-up: send in heat-treatment furnace and be heated to 540-680 DEG C, and be incubated 2-3 hour; Then, with quenching oil cooling, finally temper is carried out: sent in tempering furnace by the valve rod after quenching and be heated to 350-450 DEG C, insulation 50-70min;
D, phosphorating treatment, at 100-150 DEG C, pH value is adopted to be that the surface conditioner of 8 is to valve rod process 1min, after dripping empty 1-2min, adopt bonderite process 15-20min again, then after dripping empty 1-2min, adopt clean water 1-2min, after dripping empty 1-2min again, process 0.5-1min with hot water valve rod being placed in 78-100 DEG C;
E, subzero treatment: the valve rod after phosphorating treatment is loaded container, and add liquid nitrogen and carry out subzero treatment, the time is 11-12 hour;
F, nitrogen treatment: the valve rod after subzero treatment is loaded container, and carry out nitrogen treatment, temperature controls at 550-580 DEG C, and the time is 3-5h.
Through detecting, Testing index of the present invention is as follows:
。
Claims (2)
1. the valve rod powder metallurgy manufacture method of check-valves, is characterized in that, include following steps,
A, select following powder stock powder metallurgy once compressing obtained valve rod, its percentage by weight is: surplus is ferrous alloy powder; Carbon: 0.3 ~ 1.2%; Tree ash: 0.2-1.4%; Copper: 0.7 ~ 2.4%; Manganese sulfide: 0.1 ~ 0.5%; Zinc stearate: 0.3 ~ 1.2%;
B, sinter molding being obtained valve rod goods, to put into 20 ~ No. 30 machine oil soak times be 2-3 hour, then carry out water atomization steam treatment, and the processing time is 3-5 hour, and temperature is 550-650 DEG C;
C, heat treatment: first carry out normalized treatment, be incubated 1-2 hour by the valve rod after steam treatment at 665-775 DEG C, carries out Quenching Treatment again after taking-up: send in heat-treatment furnace and be heated to 540-680 DEG C, and be incubated 2-3 hour; Then, with quenching oil cooling, finally temper is carried out: sent in tempering furnace by the valve rod after quenching and be heated to 350-450 DEG C, insulation 50-70min;
D, phosphorating treatment, at 100-150 DEG C, pH value is adopted to be that the surface conditioner of 8 is to valve rod process 1min, after dripping empty 1-2min, adopt bonderite process 15-20min again, then after dripping empty 1-2min, adopt clean water 1-2min, after dripping empty 1-2min again, process 0.5-1min with hot water valve rod being placed in 78-100 DEG C;
E, subzero treatment: the valve rod after phosphorating treatment is loaded container, and add liquid nitrogen and carry out subzero treatment, the time is 11-12 hour;
F, nitrogen treatment: the valve rod after subzero treatment is loaded container, and carry out nitrogen treatment, temperature controls at 550-580 DEG C, and the time is 3-5h.
2. the valve rod powder metallurgy manufacture method of check-valves according to claim 1, is characterized in that, described step a, selects following powder stock powder metallurgy once compressing obtained valve rod, and its percentage by weight is: surplus is ferrous alloy powder; Carbon: 0.8%; Tree ash: 1.1%; Copper: 1.3%; Manganese sulfide: 0.3%; Zinc stearate: 0.8%.
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| CN201210482111.1A CN103008642B (en) | 2012-11-25 | 2012-11-25 | The valve rod powder metallurgy manufacture method of check-valves |
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| CN201210482111.1A CN103008642B (en) | 2012-11-25 | 2012-11-25 | The valve rod powder metallurgy manufacture method of check-valves |
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| CN103008642A CN103008642A (en) | 2013-04-03 |
| CN103008642B true CN103008642B (en) | 2015-12-09 |
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| CN103537679A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy automobile connecting rod and preparing method of powder metallurgy automobile connecting rod |
| CN103537672A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy automobile engine connecting rod and manufacturing method thereof |
| CN106041091A (en) * | 2016-07-18 | 2016-10-26 | 安徽奥泰粉末冶金有限公司 | Production technology of piston for powder-metallurgy engine |
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| CN1058650C (en) * | 1995-10-05 | 2000-11-22 | 电子工业部第二研究所 | Manufacture method of powder metallurgy valve seat |
| US6139598A (en) * | 1998-11-19 | 2000-10-31 | Eaton Corporation | Powdered metal valve seat insert |
| CN1142307C (en) * | 2000-05-24 | 2004-03-17 | 曾佑鑫 | Iron-base powder metallurgy air valve base for internal combustion engine and its production process |
| KR20030021916A (en) * | 2001-09-10 | 2003-03-15 | 현대자동차주식회사 | A compound of wear-resistant sintered alloy for valve seat and its manufacturing method |
| EP1391529B1 (en) * | 2002-08-16 | 2008-10-01 | Alloy Technology Solutions, Inc. | Wear and corrosion resistant austenitic iron base alloy |
| CN102092417A (en) * | 2010-12-06 | 2011-06-15 | 十堰合骏实业有限公司 | Integrated valve bush and powder metallurgy process method thereof |
| CN102773482B (en) * | 2012-06-30 | 2014-05-21 | 安徽省繁昌县皖南阀门铸造有限公司 | Method for manufacturing butterfly valve rod by powder metallurgy |
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