CN102990066A - Powder metallurgy forming and preparation method of valve rod of diaphragm valve - Google Patents
Powder metallurgy forming and preparation method of valve rod of diaphragm valve Download PDFInfo
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- CN102990066A CN102990066A CN2012104821198A CN201210482119A CN102990066A CN 102990066 A CN102990066 A CN 102990066A CN 2012104821198 A CN2012104821198 A CN 2012104821198A CN 201210482119 A CN201210482119 A CN 201210482119A CN 102990066 A CN102990066 A CN 102990066A
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Abstract
The invention discloses a powder metallurgy forming and preparation method of a valve rod of a diaphragm valve. The preparation method comprises the following steps of: preparing a mixed powder raw material, adding components of a lubricating agent, an MCF-078 and tree ash in prealloy steel powder containing Cu, Mo and Ni as the basic raw material powder, wherein the adding quantities of the components are counted in the terms of mass of the prealloy steel powder containing Cu, Mo and Ni as the basic raw material: the content of the tree ash is 0.7 percent, the content of the lubricating agent is 0.7 percent, and the content of the MCF-078 is 0.3 percent; and pressing, sintering and forming to obtain a blank of the valve rod. The powder metallurgy forming and preparation method has the advantages of higher production continuity and high material utilization rate, and is suitable for massive production, thereby lowering cost.
Description
Technical field
The present invention relates to a kind of preparation method of diaphragm valve, specifically belong to a kind of powder metallurgy forming preparation method of diaphragm valve valve rod.
Background technology
Diaphragm valve is that a flexible diaphragm or composite membrane are housed in valve body and valve gap, and its closure member is a kind of compression set that is connected with barrier film.Valve seat can be weir shape, also can be the tube wall of straight-through runner.The advantage of diaphragm valve is that its operating mechanism and medium channel separate, and has not only guaranteed the pure of working media, also prevents the possibility of pipeline medium impulse maneuver mechanism workpiece simultaneously.In addition, the valve rod place does not need to adopt any type of independent sealing, unless use as safety devices in the control hazardous medium.
At present, preparation diaphragm valve industry, domestic spherical diaphragm valve valve body all adopts common high-speed steel material, or the stainless steel material is by the spherical diaphragm valve valve body of machined.Compare with powder metallurgy diaphragm valve valve body; the spherical diaphragm valve valve body process velocity that common high-speed steel material or the machined of stainless steel material are made is slower; stock utilization is not high; and powder metallurgical technique is made stop valve; not only stock utilization is high; and be unsuitable for producing in enormous quantities, need the powder metallurgy valve body is carried out a small amount of fine grinding before assembling is used, use procedure often wear phenomenon can occur.
Summary of the invention
Technical problem to be solved by this invention is for diaphragm valve valve rod technology present situation, and the powder metallurgy forming preparation method of the diaphragm valve valve rod that a kind of production efficiency is high, manufacturing cost is lower that provides.
The technical solution used in the present invention is as follows:
A kind of powder metallurgy forming preparation method of diaphragm valve valve rod includes following steps:
A, configuration mixed-powder raw material, containing at the basic material powder increases component lubricant, MCF-078, trees ashes in the prealloy comminuted steel shot of Cu, Mo and Ni, the addition of each component is take the quality of the prealloy comminuted steel shot of basic material powder low alloyed steel powder Cu, Mo and Ni as radix, the trees ashes are 0.7%, lubricant is 0.7%, MCF-078 is 0.3%, obtain the valve rod blank through compacting, sinter molding again;
B, Quenching Treatment: the valve rod blank of sinter molding is sent in the heat-treatment furnace, the valve rod blank is placed the glowing furnace of the first design temperature, the first design temperature is 800 ℃-900 ℃, keep the interior temperature of glowing furnace that the valve rod blank is implemented to quench, the temperature retention time scope is 2.2-2.8 hour, valve rod blank after the heating of quenching come out of the stove be cooled to temperature≤150 ℃, the valve rod blank is placed the glowing furnace of the second design temperature, the second design temperature is 900 ℃-1000 ℃, keep the interior temperature of glowing furnace that the valve rod blank is implemented to quench, the temperature retention time scope is 2.5-2.8 hour, and the valve rod blank after the heating of quenching is come out of the stove is cooled to temperature≤150 ℃;
C, temper: the part after will quenching is sent into and is heated to 350-400 ℃ in the tempering furnace, and insulation 50-70min repeats once above-mentioned tempering process again;
D, subzero treatment: with the container of packing into of part after the tempering, add liquid nitrogen and carry out subzero treatment, the time is 10-12 hour.
Described temper: the part after will quenching is sent into and is heated to 380 ℃ in the tempering furnace, and insulation 60min repeats once above-mentioned tempering process again.
Compared with prior art, the invention has the advantages that:
Composition of raw materials of the present invention is reasonable, and technique is simple, and alloy has high temperature hardness and the high temperature compressed intensity of improvement, is fit to be applied to the valve that the high temperature occasion is made, the long service life of valve, and qualification rate is high, has greatly improved the quality of product, is fit to extensively promote.
It is as follows that mechanical property of the present invention detects data:
Hardness (HRB) 64
Tensile strength (MPa) 320
Compression yield strength (MPa) 370
Cross-breaking strength (MPa) 670.
The specific embodiment
A kind of powder metallurgy forming preparation method of diaphragm valve valve rod includes following steps:
A, configuration mixed-powder raw material, containing at the basic material powder increases component lubricant, MCF-078, trees ashes in the prealloy comminuted steel shot of Cu, Mo and Ni, the addition of each component is take the quality of the prealloy comminuted steel shot of basic material powder low alloyed steel powder Cu, Mo and Ni as radix, the trees ashes are 0.7%, lubricant is 0.7%, MCF-078 is 0.3%, obtain the valve rod blank through compacting, sinter molding again;
B, Quenching Treatment: the valve rod blank of sinter molding is sent in the heat-treatment furnace, the valve rod blank is placed the glowing furnace of the first design temperature, the first design temperature is 800 ℃-900 ℃, keep the interior temperature of glowing furnace that the valve rod blank is implemented to quench, the temperature retention time scope is 2.2-2.8 hour, valve rod blank after the heating of quenching come out of the stove be cooled to temperature≤150 ℃, the valve rod blank is placed the glowing furnace of the second design temperature, the second design temperature is 900 ℃-1000 ℃, keep the interior temperature of glowing furnace that the valve rod blank is implemented to quench, the temperature retention time scope is 2.5-2.8 hour, and the valve rod blank after the heating of quenching is come out of the stove is cooled to temperature≤150 ℃;
C, temper: the part after will quenching is sent into and is heated to 380 ℃ in the tempering furnace, and insulation 60min repeats once above-mentioned tempering process again;
D, subzero treatment: with the container of packing into of part after the tempering, add liquid nitrogen and carry out subzero treatment, the time is 10-12 hour.
It is as follows that mechanical property of the present invention detects data:
Hardness (HRB) 64
Tensile strength (MPa) 320
Compression yield strength (MPa) 370
Cross-breaking strength (MPa) 670.
Claims (2)
1. the powder metallurgy forming preparation method of a diaphragm valve valve rod is characterized in that including following steps:
A, configuration mixed-powder raw material, containing at the basic material powder increases component lubricant, MCF-078, trees ashes in the prealloy comminuted steel shot of Cu, Mo and Ni, the addition of each component is take the quality of the prealloy comminuted steel shot of basic material powder low alloyed steel powder Cu, Mo and Ni as radix, the trees ashes are 0.7%, lubricant is 0.7%, MCF-078 is 0.3%, obtain the valve rod blank through compacting, sinter molding again;
B, Quenching Treatment: the valve rod blank of sinter molding is sent in the heat-treatment furnace, the valve rod blank is placed the glowing furnace of the first design temperature, the first design temperature is 800 ℃-900 ℃, keep the interior temperature of glowing furnace that the valve rod blank is implemented to quench, the temperature retention time scope is 2.2-2.8 hour, valve rod blank after the heating of quenching come out of the stove be cooled to temperature≤150 ℃, the valve rod blank is placed the glowing furnace of the second design temperature, the second design temperature is 900 ℃-1000 ℃, keep the interior temperature of glowing furnace that the valve rod blank is implemented to quench, the temperature retention time scope is 2.5-2.8 hour, and the valve rod blank after the heating of quenching is come out of the stove is cooled to temperature≤150 ℃;
C, temper: the part after will quenching is sent into and is heated to 350-400 ℃ in the tempering furnace, and insulation 50-70min repeats once above-mentioned tempering process again;
D, subzero treatment: with the container of packing into of part after the tempering, add liquid nitrogen and carry out subzero treatment, the time is 10-12 hour.
2. the powder metallurgy forming preparation method of a kind of diaphragm valve valve rod according to claim 1, it is characterized in that: described temper: the part after will quenching is sent into and is heated to 380 ℃ in the tempering furnace, and insulation 60min repeats once above-mentioned tempering process again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210482119.8A CN102990066B (en) | 2012-11-25 | 2012-11-25 | Powder metallurgy forming and preparation method of valve rod of diaphragm valve |
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| CN201210482119.8A CN102990066B (en) | 2012-11-25 | 2012-11-25 | Powder metallurgy forming and preparation method of valve rod of diaphragm valve |
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| CN102990066A true CN102990066A (en) | 2013-03-27 |
| CN102990066B CN102990066B (en) | 2015-03-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233166A (en) * | 2013-03-30 | 2013-08-07 | 安徽省恒宇粉末冶金有限公司 | Powder metallurgy sector gear and making method thereof |
| CN103506618A (en) * | 2013-10-15 | 2014-01-15 | 中南大学 | Mn-contained mixture steel powder for powder metallurgy and preparing method |
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| JPS54104406A (en) * | 1978-02-06 | 1979-08-16 | Toyo Kohan Co Ltd | Production of high temperature abrasion resistant sintered alloy steel |
| JPH09157805A (en) * | 1995-12-04 | 1997-06-17 | Mitsubishi Materials Corp | High strength iron base sintered alloy |
| CN102672180A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Powdery metallurgical finished product process |
| CN102773485A (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 check valve core by powder metallurgy |
| CN102773483A (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 valve seat of stop valve by powder metallurgy |
| 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 CN201210482119.8A patent/CN102990066B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54104406A (en) * | 1978-02-06 | 1979-08-16 | Toyo Kohan Co Ltd | Production of high temperature abrasion resistant sintered alloy steel |
| JPH09157805A (en) * | 1995-12-04 | 1997-06-17 | Mitsubishi Materials Corp | High strength iron base sintered alloy |
| CN102672180A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Powdery metallurgical finished product process |
| CN102773485A (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 check valve core by powder metallurgy |
| CN102773483A (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 valve seat of stop valve by powder metallurgy |
| 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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233166A (en) * | 2013-03-30 | 2013-08-07 | 安徽省恒宇粉末冶金有限公司 | Powder metallurgy sector gear and making method thereof |
| CN103233166B (en) * | 2013-03-30 | 2015-12-23 | 安徽省恒宇粉末冶金有限公司 | A kind of powder metallurgy toothed segment and preparation method thereof |
| CN103506618A (en) * | 2013-10-15 | 2014-01-15 | 中南大学 | Mn-contained mixture steel powder for powder metallurgy and preparing method |
| CN103506618B (en) * | 2013-10-15 | 2016-02-24 | 中南大学 | Powder used in metallurgy is containing Mn mixing comminuted steel shot and preparation method |
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| CN102990066B (en) | 2015-03-04 |
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