CN103008642A - Valve rod powder metallurgy manufacturing method for check valve - Google Patents
Valve rod powder metallurgy manufacturing method for check valve Download PDFInfo
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- CN103008642A CN103008642A CN2012104821111A CN201210482111A CN103008642A CN 103008642 A CN103008642 A CN 103008642A CN 2012104821111 A CN2012104821111 A CN 2012104821111A CN 201210482111 A CN201210482111 A CN 201210482111A CN 103008642 A CN103008642 A CN 103008642A
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Abstract
The invention discloses a valve rod powder metallurgy manufacturing method for a check valve, which is characterized by comprising the following steps: a, preparing a valve rod through the following powdered raw materials and powdered alloy in weight percentage by one-step press forming: the balance of ferrous metal powder, 0.3 to 1.2% of carbon, 0.2 to 1.4% of tree ash, 0.7 to 2.4% of copper, 0.1 to o.5% of manganese sulfide, and 0.3 to 1.2% of zinc stearate. The method takes powdered alloy steel as the main material, can improve strength, corrosion resistance, and abrasive resistance of medal parts, and lowers manufacturing cost of the powdered metallurgy material.
Description
Technical field
The present invention relates to the valve rod powder metallurgy manufacture method of check-valves.
Background technology
PM technique can with the parts of the shape production requirement high dimensional accuracy extremely close with article shape, complicated shape, can reduce the cutting cost significantly.Therefore, sintered metal product is as the parts of various machineries, device and utilize in many-side.
Generally speaking, the alloy such as mixing graphite powder is with lubricant powders such as powder and stearic acid, stearic acid files and after forming the iron-based powder mixed powder in the iron-based powder, this iron-based powder mixed powder is filled into metal die, press molding and make powder metallurgical with iron-based powder formed body (powder compact).Wherein, iron-based powder can be divided into iron powder (straight iron powder etc.), powdered alloy steel etc. according to composition.And 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 6.67.1 Mg/m3.Further implement sintering processes and form sintered body for these iron-based powder formed bodies, and implement as required finishing, machining and form sintered metal product.And, when needing to improve hot strength, fatigue strength, also implement carburizing heat treatment, brightness heat treatment behind the sintering.At present, China's iron-base powder metallurgy material commonly used closes the more valuable non-ferrous metals such as copper, nickel, trees ashes, and cost is higher, and intensity and wearing no resistance, and product's dimensional precision is difficult to control.
Summary of the invention
A kind of valve rod powder metallurgy manufacture method of check-valves is provided on the purpose of the present invention, a kind of take powdered alloy steel as main, can improve metal parts intensity, corrosion resistance, wearability and lower the powdered metallurgical material of manufacturing cost.
The technical solution adopted in the present invention is:
The valve rod powder metallurgy manufacture method of check-valves includes following steps,
A, select the once compressing valve rod that makes of following powder stock powder metallurgy, its percentage by weight is: surplus is ferrous alloy powder; Carbon: 0.3～1.2%; Trees ashes: 0.2-1.4%; Copper: 0.7～2.4%; Manganese sulfide: 0.1～0.5%; Zinc stearate: 0.3～1.2%;
B, sinter molding is obtained the valve rod goods, and to put into 20 ~ No. 30 machine oil soak times be 2-3 hour, carries out the water atomization steam treatment again, and the processing time is 3-5 hour, and temperature is 550-650 ℃;
C, heat treatment: carry out first normalized treatment, the valve rod after the steam treatment 665-775 ℃ of lower insulation about 1-2 hour, is carried out Quenching Treatment again after the taking-up: send into and be heated to 540-680 ℃ in the heat-treatment furnace, and be incubated 2-3 hour; Then, with the quenching oil cooling, carry out at last temper: the valve rod after will quenching is sent into and is heated to 350-450 ℃ in the tempering furnace, insulation 50-70min;
D, phosphatization are processed, under 100-150 ℃, adopting pH value is that 8 surface conditioner is processed 1min to valve rod, after dripping empty 1-2min, adopt again bonderite to process 15-20min, after dripping empty 1-2min, adopt clear water to clean 1-2min again, after dripping again empty 1-2min, process 0.5-1min valve rod is placed 78-100 ℃ hot water;
E, subzero treatment: the container of packing into of the valve rod after phosphatization processed, add liquid nitrogen and carry out subzero treatment, the time is 11-12 hour;
F, nitrogen treatment: the container of packing into of the valve rod after phosphatization processed, carry out nitrogen treatment, temperature is controlled at 550-580 ℃, and the time is 3-5h.
Described step a, select the once compressing valve rod that makes of following powder stock powder metallurgy, its percentage by weight is: surplus is ferrous alloy powder; Carbon: 0.8%; Trees ashes: 1.1%; Copper: 1.3%; Manganese sulfide: 0.3%; Zinc stearate: 0.8%.
The invention has the beneficial effects as follows:
As main body, do not utilize special sintering circuit can keep the density of higher sintered body with powdered alloy steel yet, not only can improve hot strength, can also improve bending fatigue strength; Because the adding of antimony, occur obviously to shrink after making the goods sintering, and great majority add elements in the iron-base powder metallurgy material, such as copper etc., volume is expanded, therefore, change the addition of antimony, can support to some extent and send expansion, obtain a kind of burning
Change in volume approaches zero behind the knot, accurate in size powder metallurgy product; In addition, antimony improves intensity, wearability and the corrosion resistance of iron-base powder metallurgy material significantly, can also further reduce production costs simultaneously.
Through detecting, it is as follows that the present invention detects index:
Hardness (HRB) 70
Tensile strength (MPa) 380
Compression yield strength (MPa) 400
Cross-breaking strength (MPa) 720.
The specific embodiment
The valve rod powder metallurgy manufacture method of check-valves includes following steps,
A, select the once compressing valve rod that makes of following powder stock powder metallurgy, its percentage by weight is: surplus is ferrous alloy powder; Carbon: 0.8%; Trees ashes: 1.1%; Copper: 1.3%; Manganese sulfide: 0.3%; Zinc stearate: 0.8%;
B, sinter molding is obtained the valve rod goods, and to put into 20 ~ No. 30 machine oil soak times be 2-3 hour, carries out the water atomization steam treatment again, and the processing time is 3-5 hour, and temperature is 550-650 ℃;
C, heat treatment: carry out first normalized treatment, the valve rod after the steam treatment 665-775 ℃ of lower insulation about 1-2 hour, is carried out Quenching Treatment again after the taking-up: send into and be heated to 540-680 ℃ in the heat-treatment furnace, and be incubated 2-3 hour; Then, with the quenching oil cooling, carry out at last temper: the valve rod after will quenching is sent into and is heated to 350-450 ℃ in the tempering furnace, insulation 50-70min;
D, phosphatization are processed, under 100-150 ℃, adopting pH value is that 8 surface conditioner is processed 1min to valve rod, after dripping empty 1-2min, adopt again bonderite to process 15-20min, after dripping empty 1-2min, adopt clear water to clean 1-2min again, after dripping again empty 1-2min, process 0.5-1min valve rod is placed 78-100 ℃ hot water;
E, subzero treatment: the container of packing into of the valve rod after phosphatization processed, add liquid nitrogen and carry out subzero treatment, the time is 11-12 hour;
F, nitrogen treatment: the container of packing into of the valve rod after phosphatization processed, carry out nitrogen treatment, temperature is controlled at 550-580 ℃, and the time is 3-5h.
Through detecting, it is as follows that the present invention detects index:
Hardness (HRB) 70
Tensile strength (MPa) 380
Compression yield strength (MPa) 400
Cross-breaking strength (MPa) 720.
Claims (2)
1. the valve rod powder metallurgy manufacture method of check-valves is characterized in that, includes following steps,
A, select the once compressing valve rod that makes of following powder stock powder metallurgy, its percentage by weight is: surplus is ferrous alloy powder; Carbon: 0.3～1.2%; Trees ashes: 0.2-1.4%; Copper: 0.7～2.4%; Manganese sulfide: 0.1～0.5%; Zinc stearate: 0.3～1.2%;
B, sinter molding is obtained the valve rod goods, and to put into 20 ~ No. 30 machine oil soak times be 2-3 hour, carries out the water atomization steam treatment again, and the processing time is 3-5 hour, and temperature is 550-650 ℃;
C, heat treatment: carry out first normalized treatment, the valve rod after the steam treatment 665-775 ℃ of lower insulation about 1-2 hour, is carried out Quenching Treatment again after the taking-up: send into and be heated to 540-680 ℃ in the heat-treatment furnace, and be incubated 2-3 hour; Then, with the quenching oil cooling, carry out at last temper: the valve rod after will quenching is sent into and is heated to 350-450 ℃ in the tempering furnace, insulation 50-70min;
D, phosphatization are processed, under 100-150 ℃, adopting pH value is that 8 surface conditioner is processed 1min to valve rod, after dripping empty 1-2min, adopt again bonderite to process 15-20min, after dripping empty 1-2min, adopt clear water to clean 1-2min again, after dripping again empty 1-2min, process 0.5-1min valve rod is placed 78-100 ℃ hot water;
E, subzero treatment: the container of packing into of the valve rod after phosphatization processed, add liquid nitrogen and carry out subzero treatment, the time is 11-12 hour;
F, nitrogen treatment: the container of packing into of the valve rod after phosphatization processed, carry out nitrogen treatment, temperature is controlled at 550-580 ℃, and the time is 3-5h.
2. the valve rod powder metallurgy manufacture method of described check-valves according to claim 1 is characterized in that, described step a, selects the once compressing valve rod that makes of following powder stock powder metallurgy, and its percentage by weight is: surplus is ferrous alloy powder; Carbon: 0.8%; Trees ashes: 1.1%; Copper: 1.3%; Manganese sulfide: 0.3%; Zinc stearate: 0.8%.
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| Application Number | Priority Date | Filing Date | Title |
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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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| CN103008642B CN103008642B (en) | 2015-12-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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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| CN1131595A (en) * | 1995-10-05 | 1996-09-25 | 电子工业部第二研究所 | Manufacture method of powder metallurgy valve seat |
| CN1260405A (en) * | 1998-11-19 | 2000-07-19 | 易通公司 | Powdered metallurgy valve-seat insert piece |
| CN1324957A (en) * | 2000-05-24 | 2001-12-05 | 曾佑鑫 | Iron-base powder metallurgy air valve base for internal combustion engine and its production process |
| US20030097904A1 (en) * | 2001-09-10 | 2003-05-29 | Jung Seok Oh | Sintered alloy for valve seat having excellent wear resistance and method for producing the same |
| US20040033154A1 (en) * | 2002-08-16 | 2004-02-19 | Winsert Technologies, 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 |
| CN102773482A (en) * | 2012-06-30 | 2012-11-14 | 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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2012
- 2012-11-25 CN CN201210482111.1A patent/CN103008642B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131595A (en) * | 1995-10-05 | 1996-09-25 | 电子工业部第二研究所 | Manufacture method of powder metallurgy valve seat |
| CN1260405A (en) * | 1998-11-19 | 2000-07-19 | 易通公司 | Powdered metallurgy valve-seat insert piece |
| CN1324957A (en) * | 2000-05-24 | 2001-12-05 | 曾佑鑫 | Iron-base powder metallurgy air valve base for internal combustion engine and its production process |
| US20030097904A1 (en) * | 2001-09-10 | 2003-05-29 | Jung Seok Oh | Sintered alloy for valve seat having excellent wear resistance and method for producing the same |
| US20040033154A1 (en) * | 2002-08-16 | 2004-02-19 | Winsert Technologies, 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 |
| CN102773482A (en) * | 2012-06-30 | 2012-11-14 | 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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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| CN103008642B (en) | 2015-12-09 |
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