CN102994892B - A kind of swing check valve valve plate preparation method - Google Patents
A kind of swing check valve valve plate preparation method Download PDFInfo
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- CN102994892B CN102994892B CN201210373496.8A CN201210373496A CN102994892B CN 102994892 B CN102994892 B CN 102994892B CN 201210373496 A CN201210373496 A CN 201210373496A CN 102994892 B CN102994892 B CN 102994892B
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Abstract
The invention discloses a kind of swing check valve valve plate preparation method, include following steps: a, casting valve plate blank, each constituent chemical components weight percent is: C:2.85-3.20%, Si:1.2-1.5%, Mn:0.8-1.2%, P:0.6-0.8%, S:0.05-0.07%, Cr? 0.24-0.35%, Cu? 0.7-0.9%, the slab temperature of casting is down to 300 DEG C, reheat to 650-760 DEG C, insulation 3-5 hour, stove is chilled to 300 DEG C, be incubated 4 hours, reheat to 650-760 DEG C, be incubated 17 hours, 450 DEG C are cooled to 50 DEG C/h, again with 20 DEG C/h, be cooled to 140 DEG C.Mmaterial of the present invention and manufacturing process have higher continuous production, and material use efficiency is high, are suitable for producing in enormous quantities, reduce costs.
Description
Technical field
The present invention relates to a kind of preparation method of butterfly valve valve rod, specifically belong to a kind of swing check valve valve plate preparation method.
Background technology
Vacuum breaker 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 gases of various concentration, the pipeline of liquid medium uses.
At present, prepare vacuum breaker industry, domestic ball non-return valve flap all adopts common rapid steel material, or stainless steel material is by machining ball non-return valve flap.Compared with powder metallurgy seat of stop valve, the ball non-return valve flap process velocity that common rapid steel material or the machining of stainless steel material manufacture is slower, material use efficiency is not high, and powder metallurgical technique manufactures stopping valve, not only material use efficiency is high, and be suitable for producing in enormous quantities, need to carry out a small amount of ground finish to powder metallurgy valve body before assembling uses.
Summary of the invention
Technical problem to be solved by this invention is for vacuum breaker valve plate Technology present situation, and a kind of swing check valve valve plate preparation method that a kind of production efficiency provided is high, manufacturing cost is lower.
The technical solution used in the present invention is as follows:
A kind of swing check valve valve plate preparation method, includes following steps:
A, casting valve plate blank, each constituent chemical components weight percent is: C:2.85-3.20%, Si:1.2-1.5%, Mn:0.8-1.2%, P:0.6-0.8%, S:0.05-0.07%, Cr0.24-0.35%, Cu0.7-0.9%, the slab temperature of casting is down to 300 DEG C, reheat to 650-760 DEG C, insulation 3-5 hour, stove is chilled to 300 DEG C, be incubated 4 hours, reheat to 650-760 DEG C, be incubated 17 hours, be cooled to 450 DEG C with 50 DEG C/h, then with 20 DEG C/h, be cooled to 140 DEG C;
B, above-mentioned starting 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 vacuum breaker valve plate, described steam treatment is water atomization steam treatment, and the treatment time is 4-5 hour, and temperature is 550-650 DEG C;
D, quench treatment: vacuum breaker valve plate 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 vacuum breaker valve plate after quenching is sent in tempering stove and is heated to 300-400 DEG C, insulation 50-70min;
F, bonderizing, 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 phosphorization agent 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;
G, sub-zero treatment: disc parts after bonderizing is loaded container, and add liquid nitrogen and carry out sub-zero treatment, the time is 10-12 hour.
In step c, pour into a mould potting syrup, cooled and solidified by cast gate in sand mold, after taking out, namely steam treatment obtains vacuum breaker valve plate, and described steam treatment is water atomization steam treatment, and the treatment time is 4.5 hours, and temperature is 600 DEG C.
Compared with prior art, the invention has the advantages that:
Compared with prior art, the inventive method is by cast operation, and by quenching, tempering, phosphatization, sub-zero treatment, tensile strength sigma b (MPa): >=1080 (110) of the vacuum breaker valve plate obtained, yield strength σ s (MPa): >=930 (95), elongation δ 5 (%): >=12, relative reduction in area ψ (%): >=45, Impact energy Ak v (J): >=63, notched bar impact strength α kv (J/cm2): >=78.
The present invention makes blank obtain rational distribution, thus decrease the size of overlap, material use efficiency is made to have brought up to 70% from original about 30%, improve 40%, because blank reduces, equipment hitting power also reduces accordingly, causes the life-span of mould to bring up to 9000 from original 5000, improves nearly about one times.After blank properly distributed, due to the minimizing of overlap, metal reflow causes that folder is dirty and forging part sufficient and part is not abundant etc. that phenomenon improves.
Embodiment
A kind of swing check valve valve plate preparation method, includes following steps:
A, casting valve plate blank, each constituent chemical components weight percent is: C:2.85-3.20%, Si:1.2-1.5%, Mn:0.8-1.2%, P:0.6-0.8%, S:0.05-0.07%, Cr0.24-0.35%, Cu0.7-0.9%, the slab temperature of casting is down to 300 DEG C, reheat to 650-760 DEG C, insulation 3-5 hour, stove is chilled to 300 DEG C, be incubated 4 hours, reheat to 650-760 DEG C, be incubated 17 hours, be cooled to 450 DEG C with 50 DEG C/h, then with 20 DEG C/h, be cooled to 140 DEG C;
B, above-mentioned starting 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 vacuum breaker valve plate, described steam treatment is water atomization steam treatment, and the treatment time is 4.5 hours, and temperature is 600 DEG C;
D, quench treatment: vacuum breaker valve plate 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 vacuum breaker valve plate after quenching is sent in tempering stove and is heated to 300-400 DEG C, insulation 50-70min;
F, bonderizing, 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 phosphorization agent 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;
G, sub-zero treatment: disc parts after bonderizing is loaded container, and add liquid nitrogen and carry out sub-zero treatment, the time is 10-12 hour.
Claims (2)
1. a swing check valve valve plate preparation method, is characterized in that including following steps:
A, casting valve plate blank, each constituent chemical components weight percent is: C:2.85-3.20%, Si:1.2-1.5%, Mn:0.8-1.2%, P:0.6-0.8%, S:0.05-0.07%, Cr0.24-0.35%, Cu0.7-0.9%, the slab temperature of casting is down to 300 DEG C, reheat to 650-760 DEG C, insulation 3-5 hour, stove is chilled to 300 DEG C, be incubated 4 hours, reheat to 650-760 DEG C, be incubated 17 hours, be cooled to 450 DEG C with 50 DEG C/h, then with 20 DEG C/h, be cooled to 140 DEG C;
B, above-mentioned starting 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 vacuum breaker valve plate, described steam treatment is water atomization steam treatment, and the treatment time is 4-5 hour, and temperature is 550-650 DEG C;
D, quench treatment: vacuum breaker valve plate 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 vacuum breaker valve plate after quenching is sent in tempering stove and is heated to 300-400 DEG C, insulation 50-70min;
F, bonderizing, 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 phosphorization agent 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;
G, sub-zero treatment: disc parts after bonderizing is loaded container, and add liquid nitrogen and carry out sub-zero treatment, the time is 10-12 hour.
2. swing check valve valve plate preparation method according to claim 1, is characterized in that:
In step c, pour into a mould potting syrup, cooled and solidified by cast gate in sand mold, after taking out, namely steam treatment obtains vacuum breaker valve plate, and described steam treatment is water atomization steam treatment, and the treatment time is 4.5 hours, and temperature is 600 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210373496.8A CN102994892B (en) | 2012-09-29 | 2012-09-29 | A kind of swing check valve valve plate preparation method |
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| CN201210373496.8A CN102994892B (en) | 2012-09-29 | 2012-09-29 | A kind of swing check valve valve plate preparation method |
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| CN102994892A CN102994892A (en) | 2013-03-27 |
| CN102994892B true CN102994892B (en) | 2016-04-06 |
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| CN114273617B (en) * | 2021-12-24 | 2024-02-27 | 福建贝得阀门有限公司 | Rapid casting molding process for valve body of soft and hard sealing ball valve |
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| CN85107725A (en) * | 1985-10-17 | 1986-07-23 | 陕西机械学院 | Make the vermicular cast iron of mould for glass bottle |
| CN1045280A (en) * | 1989-02-28 | 1990-09-12 | 陕西机械学院 | Bainite and martensite mottled nodular cast iron grinding ball |
| CN1054621A (en) * | 1990-03-02 | 1991-09-18 | 柳州市都乐企业集团 | Iron pan corrosiron and manufacturing process thereof |
| CN101081432A (en) * | 2007-06-04 | 2007-12-05 | 天乾（无锡）科技有限公司 | Method for founding main regulation valve body of steam turbine |
| CN101618508A (en) * | 2009-07-30 | 2010-01-06 | 扬州东升汽车零部件制造有限公司 | Method for producing vehicle-used stabilizer bar with high corrosion resistance |
| US20100239451A1 (en) * | 2007-06-26 | 2010-09-23 | Incorporated National University Iwate University | Flake Graphite Cast Iron And Production Method Thereof |
| 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 |
-
2012
- 2012-09-29 CN CN201210373496.8A patent/CN102994892B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107725A (en) * | 1985-10-17 | 1986-07-23 | 陕西机械学院 | Make the vermicular cast iron of mould for glass bottle |
| CN1045280A (en) * | 1989-02-28 | 1990-09-12 | 陕西机械学院 | Bainite and martensite mottled nodular cast iron grinding ball |
| CN1054621A (en) * | 1990-03-02 | 1991-09-18 | 柳州市都乐企业集团 | Iron pan corrosiron and manufacturing process thereof |
| CN101081432A (en) * | 2007-06-04 | 2007-12-05 | 天乾（无锡）科技有限公司 | Method for founding main regulation valve body of steam turbine |
| US20100239451A1 (en) * | 2007-06-26 | 2010-09-23 | Incorporated National University Iwate University | Flake Graphite Cast Iron And Production Method Thereof |
| CN101618508A (en) * | 2009-07-30 | 2010-01-06 | 扬州东升汽车零部件制造有限公司 | Method for producing vehicle-used stabilizer bar with high corrosion resistance |
| 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 |
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Effective date of registration: 20160303 Address after: 244100 new road, West Lake Town Development Zone, lion mountain, Tongling, Anhui Applicant after: Anhui Mingzhu Pigment Technology Co., Ltd. Address before: 244121 Tongling Jinqiao Industrial Park, Tongling, Anhui Applicant before: Tongling Guofang Plumbing Technology Co., Ltd. |
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Inventor after: Zhang Chengzhong Inventor before: Xu Guorong |
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Effective date of registration: 20180522 Address after: No. 3858, Shanghai Bao Qian highway, Jiading District, Shanghai Patentee after: Shanghai Mecco Valve Co.,Ltd. Address before: 244100 New Town Road, West Lake Town Development Zone, Tongling, Anhui Patentee before: Tongling Guofang Plumbing Technology Co., Ltd. |
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