CN102996865B - Method for casting valve body of ball check valve - Google Patents
Method for casting valve body of ball check valve Download PDFInfo
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- CN102996865B CN102996865B CN201210372824.2A CN201210372824A CN102996865B CN 102996865 B CN102996865 B CN 102996865B CN 201210372824 A CN201210372824 A CN 201210372824A CN 102996865 B CN102996865 B CN 102996865B
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- valve body
- check valve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a method for manufacturing a valve body of a ball check valve through powder metallurgy. The method comprises the following steps: a, weighting the following raw materials in percentage by weight: 30-50% of pig iron, 30-40% of scrap steel, 15-20% of waste machine parts and 10-20% of waste iron scraps, wherein the sum of percentages of the raw materials is 100%, and the chemical compositions of the raw materials are controlled in percentage by weight: 2.85-3.0% of C, 1.2-1.5% of Si, 0.8-1.2% of Mn, 0.6-0.8% of P, 0.05-0.07% of S, 0.25-0.35% of Cr, and 0.7-0.9% of Cu; and b, heating the raw materials to be at 1400-1500 DEG C, melting the raw materials into molten metal; and detecting the contents of the chemical compositions, then adding corresponding lacking elemental metals into the molten metal, and uniformly mixing the obtained mixture so as to form pouring liquid. The powder metallurgy materials and manufacturing process disclosed by the invention are high in production continuity, high in material utilization rate, and suitable for mass production, and reduces the cost.
Description
Technical field
The present invention relates to a kind of preparation method of ball check valve, specifically belong to a kind of casting method of valve body of ball check valve.
Background technique
Safety check is useful in the chloroazotic acid of the various concentration of-50 ~ 150 DEG C, sulfuric acid, hydrochloric acid, hydrofluoric acid and various organic acid, strong acid, strong oxidizer, is also applicable to highly basic organic solvent and other corrosive gas of various concentration, the pipeline of liquid medium uses.
At present, prepare safety check industry, domestic valve body of ball check valve all adopts common high speed steel material, or stainless steel material is by machining valve body of ball check valve.Compared with powder metallurgy safety check, the valve body of ball check valve processing speed that common high speed steel material or the machining of stainless steel material manufacture is slower, stock utilization is not high, and powder metallurgical technique manufactures stop valve, not only stock utilization is high, and be suitable for producing in enormous quantities, need to carry out a small amount of fine grinding to powder metallurgy valve body before assembling uses.
Summary of the invention
Technical problem to be solved by this invention is for safety check process engineering present situation, and the casting method of a kind of valve body of ball check valve that a kind of manufacturing efficiency provided is high, manufacture cost is lower.
The technical solution used in the present invention is as follows:
A casting method for valve body of ball check valve, includes following steps:
A, take raw material by constitutive material weight proportion pig iron 30-50%, steel scrap 30-40%, useless parts 15-20%, waste iron filing 10-20, add up to 100%, control its chemical composition C:2.85-3.0%, Si:1.2-1.5%, Mn:0.8-1.2%, P:0.6-0.8%, S:0.05-0.07%, Cr 0.25-0.35%, Cu 0.7-0.9%;
B, above-mentioned raw material are heated to 1400-1500 DEG C, are fused into molten metal, detect the content of chemical composition, in above-mentioned molten metal, then add the metal element of corresponding shortage, mix, form potting syrup;
c, in sand mold, pour into a mould potting syrup by cast gate, cooled and solidified, take out after steam treatment namely obtain check valve body, described steam treatment is water atomization steam treatment, and the processing time is 4-5 hour, and temperature is 550-650 DEG C;
D, Quenching Treatment: check valve body is sent in heat treatment furnace and is heated to 850-890 DEG C, and be incubated 2-3 hour; Then, cool with quenching oil;
E, temper: the check valve body after quenching is sent in tempering furnace and is heated to 300-400 DEG C, insulation 50-70min;
F, phosphorating treatment, be 180-200 DEG C by workpiece at showing tremendous enthusiasm closure temperature at normal temperatures, employing pH value is the surface conditioner process 1min of 8, after dripping empty 1-2min, adopt bonderite process 15-20min, then after dripping empty 1-2min, adopt clean water 1-2min, after dripping empty 1-2min again, process 0.5-1min with hot water workpiece being placed in 78-100 DEG C.
Phosphorating treatment, be 190 DEG C by workpiece at showing tremendous enthusiasm closure temperature at normal temperatures, employing pH value is the surface conditioner process 1min of 8, after dripping empty 1.5min, adopt bonderite process 17min, then after dripping empty 1.5min, adopt clean water 1.5min, after dripping empty 1.5min again, process 0.7min with hot water workpiece being placed in 90 DEG C.
Compared with prior art, the invention has the advantages that:
The present invention passes through technique scheme, overall structure is scientific and reasonable, correspondingly reduce energy consumption, decrease materials consumption and cost input, machining accuracy improves greatly, compared with prior art stock utilization brings up to more than 90% by present 65%, power consumption reduces about 70%, and recruitment reduces 3/4ths, and a machine tool two people operates the malleable workpiece of split run more than 550, improve work efficiency about 4 times, the good effect highly significant of generation.
Mechanics properties testing data of the present invention are as follows:
Tensile strength sigma b (MPa): >=1180
Yield strength σ s (MPa): >=930
Elongation percentage δ 5 (%): >=12
Reduction of cross sectional area ψ (%): >=55
Impact energy Ak v (J): >=65
Notched bar impact strength α kv (J/cm2): >=78
Hardness :≤223HB
Embodiment
A method for powder metallurgy valve body of ball check valve, includes following steps:
A, take raw material by constitutive material weight proportion pig iron 30-50%, steel scrap 30-40%, useless parts 15-20%, waste iron filing 10-20, add up to 100%, control its chemical composition C:2.85-3.0%, Si:1.2-1.5%, Mn:0.8-1.2%, P:0.6-0.8%, S:0.05-0.07%, Cr 0.25-0.35%, Cu 0.7-0.9%;
B, above-mentioned raw material are heated to 1400-1500 DEG C, are fused into molten metal, detect the content of chemical composition, in above-mentioned molten metal, then add the metal element of corresponding shortage, mix, form potting syrup;
c, in sand mold, pour into a mould potting syrup by cast gate, cooled and solidified, take out after steam treatment namely obtain check valve body, described steam treatment is water atomization steam treatment, and the processing time is 4-5 hour, and temperature is 550-650 DEG C;
D, Quenching Treatment: check valve body is sent in heat treatment furnace and is heated to 850-890 DEG C, and be incubated 2-3 hour; Then, cool with quenching oil;
E, temper: the check valve body after quenching is sent in tempering furnace and is heated to 300-400 DEG C, insulation 50-70min;
F, phosphorating treatment, be 190 DEG C by workpiece at showing tremendous enthusiasm closure temperature at normal temperatures, employing pH value is the surface conditioner process 1min of 8, after dripping empty 1.5min, adopt bonderite process 17min, then after dripping empty 1.5min, adopt clean water 1.5min, after dripping empty 1.5min again, process 0.7min with hot water workpiece being placed in 90 DEG C.
Claims (2)
1. a casting method for valve body of ball check valve, is characterized in that including following steps:
A, take raw material by constitutive material weight proportion pig iron 30-50%, steel scrap 30-40%, useless parts 15-20%, waste iron filing 10-20%, add up to 100%, control its chemical composition C:2.85-3.0%, Si:1.2-1.5%, Mn:0.8-1.2%, P:0.6-0.8%, S:0.05-0.07%, Cr 0.25-0.35%, Cu 0.7-0.9%;
B, by above-mentioned heating raw materials to 1400-1500 DEG C, be fused into molten metal, detect the content of chemical composition, in above-mentioned molten metal, then add the metal element of corresponding shortage, mix, form potting syrup;
c, in sand mold, pour into a mould potting syrup by cast gate, cooled and solidified, take out after steam treatment namely obtain check valve body, described steam treatment is water atomization steam treatment, and the processing time is 4-5 hour, and temperature is 550-650 DEG C;
D, Quenching Treatment: check valve body is sent in heat treatment furnace and is heated to 850-890 DEG C, and be incubated 2-3 hour; Then, cool with quenching oil;
E, temper: the check valve body after quenching is sent in tempering furnace and is heated to 300-400 DEG C, insulation 50-70min;
F, phosphorating treatment, be 180-200 DEG C by workpiece at showing tremendous enthusiasm closure temperature at normal temperatures, employing pH value is the surface conditioner process 1min of 8, after dripping empty 1-2min, adopt bonderite process 15-20min, then after dripping empty 1-2min, adopt clean water 1-2min, after dripping empty 1-2min again, process 0.5-1min with hot water workpiece being placed in 78-100 DEG C.
2. the casting method of a kind of valve body of ball check valve according to claim 1, is characterized in that:
Phosphorating treatment, be 190 DEG C by workpiece at showing tremendous enthusiasm closure temperature at normal temperatures, employing pH value is the surface conditioner process 1min of 8, after dripping empty 1.5min, adopt bonderite process 17min, then after dripping empty 1.5min, adopt clean water 1.5min, after dripping empty 1.5min again, process 0.7min with hot water workpiece being placed in 90 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210372824.2A CN102996865B (en) | 2012-09-29 | 2012-09-29 | Method for casting valve body of ball check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210372824.2A CN102996865B (en) | 2012-09-29 | 2012-09-29 | Method for casting valve body of ball check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102996865A CN102996865A (en) | 2013-03-27 |
| CN102996865B true CN102996865B (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210372824.2A Expired - Fee Related CN102996865B (en) | 2012-09-29 | 2012-09-29 | Method for casting valve body of ball check valve |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103060666A (en) * | 2012-11-13 | 2013-04-24 | 安徽春辉仪表线缆集团有限公司 | Casting method of alloy body of spherical check valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4194906A (en) * | 1976-09-13 | 1980-03-25 | Noranda Mines Limited | Wear resistant low alloy white cast iron |
| CN1718824A (en) * | 2005-07-11 | 2006-01-11 | 周裕香 | Processing method of material for liquid alkali nickel containing ductile iron valve |
| CN101041868A (en) * | 2002-07-05 | 2007-09-26 | 奥林公司 | Copper alloy containing cobalt, nickle and silicon |
| CN101314809A (en) * | 2008-07-17 | 2008-12-03 | 上海交通大学 | Cast iron series mould material thermal treatment method capable of acquiring controllable and uniform rigidity |
| CN102337448A (en) * | 2011-10-25 | 2012-02-01 | 青岛和德隆机械有限公司 | Raw material composition for producing high-performance nodular cast iron valve and production method thereof |
-
2012
- 2012-09-29 CN CN201210372824.2A patent/CN102996865B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4194906A (en) * | 1976-09-13 | 1980-03-25 | Noranda Mines Limited | Wear resistant low alloy white cast iron |
| CN101041868A (en) * | 2002-07-05 | 2007-09-26 | 奥林公司 | Copper alloy containing cobalt, nickle and silicon |
| CN1718824A (en) * | 2005-07-11 | 2006-01-11 | 周裕香 | Processing method of material for liquid alkali nickel containing ductile iron valve |
| CN101314809A (en) * | 2008-07-17 | 2008-12-03 | 上海交通大学 | Cast iron series mould material thermal treatment method capable of acquiring controllable and uniform rigidity |
| CN102337448A (en) * | 2011-10-25 | 2012-02-01 | 青岛和德隆机械有限公司 | Raw material composition for producing high-performance nodular cast iron valve and production method thereof |
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| CN102996865A (en) | 2013-03-27 |
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Effective date of registration: 20160127 Address after: 244000 Anhui Tongling lion mountain eastern suburbs Office union residents committee Patentee after: TONGLING JINGWEI FLUID SCIENCE & TECHNOLOGY Co.,Ltd. Address before: 244121 Tongling Jinqiao Industrial Park, Tongling, Anhui Patentee before: TONGLING GUOFANG PLUMBING TECHNOLOGY Co.,Ltd. |
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