CN102994892A - Preparation method of swing check valve plate - Google Patents
Preparation method of swing check valve plate Download PDFInfo
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- CN102994892A CN102994892A CN2012103734968A CN201210373496A CN102994892A CN 102994892 A CN102994892 A CN 102994892A CN 2012103734968 A CN2012103734968 A CN 2012103734968A CN 201210373496 A CN201210373496 A CN 201210373496A CN 102994892 A CN102994892 A CN 102994892A
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Abstract
The invention discloses a preparation method of a swing check valve plate. The preparation method comprises the following steps of: molding a valve plate blank by pouring, cooling the blank molded by pouring to 300 DEG C, reheating the blank to 650-760 DEG C, preserving heat for 3-5 hours, furnace-cooling the blank to 300 DEG C, preserving heat for 4 hours, reheating the blank to 650-760 DEG C, preserving heat for 17 hours, cooling the blank to 450 DEG C at a speed of 50 DEG C/h and then cooling the blank to 140 DEG C at a speed of 20 DEG C/h, wherein each component comprises the following chemical components by weight percent: 2.85-3.20% 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, 0.24-0.35% of Cr and 0.7-0.9% of Cu. The preparation method has the beneficial effects that the powder metallurgy material and the manufacturing process have higher production continuity; the material utilization rate is high; the powder metallurgy material is suitable for volume production; and the cost is reduced.
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 chloroazotic acid, sulfuric acid, hydrochloric acid, hydrofluoric acid and various organic acid, strong acid, the strong oxidizer of-50～150 ℃ various concentration, also is applicable to highly basic organic solvent and other corrosive gases of various concentration, uses on the pipeline of liquid medium.
At present, preparation vacuum breaker industry, domestic ball non-return valve flap all adopts common rapid steel material, or the stainless steel material is by machining ball non-return valve flap.Compare with the 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 are made is slower, material use efficiency is not high, and powder metallurgical technique is made stopping valve, not only material use efficiency is high, and be suitable for producing in enormous quantities, before assembling is used, need the powder metallurgy valve body is carried out a small amount of ground finish.
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 is high, manufacturing cost is lower who provides.
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 component chemical composition 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 blank temperature of casting is down to 300 ℃, reheats to 650-760 ℃, be incubated 3-5 hour, stove is chilled to 300 ℃, is incubated 4 hours, reheats to 650-760 ℃, be incubated 17 hours, be cooled to 450 ℃ with 50 ℃/hour, again with 20 ℃/hour, be cooled to 140 ℃;
B, above-mentioned starting material are heated to 1400-1500 ℃, are fused into molten metal, detect the content of chemical ingredients, then in above-mentioned molten metal, 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, steam treatment namely gets the vacuum breaker valve plate after taking out, described steam treatment is the water atomization steam treatment, the treatment time is 4-5 hour, temperature is 550-650 ℃;
D, quench treatment: the vacuum breaker valve plate sent into be heated to 850-890 ℃ in the heat treatment furnace, and insulation 2-3 hour; Then, cool off with quenching oil;
E, temper: the vacuum breaker valve plate after will quenching is sent into and is heated to 300-400 ℃ in the tempering stove, insulation 50-70min;
F, bonderizing, be 180-200 ℃ with workpiece at showing tremendous enthusiasm closure temperature at normal temperatures, the employing pH value is 8 surface conditioner processing 1min, after dripping empty 1-2min, adopt phosphorization agent 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 workpiece is placed 78-100 ℃ hot water;
G, sub-zero treatment: with the container of packing into of valve plate part behind the bonderizing, add liquid nitrogen and carry out sub-zero treatment, the time is 10-12 hour.
In step c, in sand mold, pour into a mould potting syrup by cast gate, cooled and solidified, steam treatment namely gets the vacuum breaker valve plate after taking out, and described steam treatment is the water atomization steam treatment, and the treatment time is 4.5 hours, and temperature is 600 ℃.
Compared with prior art, the invention has the advantages that:
Compared with prior art, the inventive method is by the cast operation, and by quenching, tempering, phosphatization, sub-zero treatment, the tensile strength sigma b (MPa) of the vacuum breaker valve plate that obtains: 〉=1080 (110), 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, thereby reduced the size of overlap, so that material use efficiency has brought up to 70% from original about 30%, improved 40%, because blank reduces, the equipment hitting power also reduces accordingly, and the life-span that causes mould is brought up to 9000 from original 5000, improves nearly about one times.After the blank properly distributed, because the minimizing of overlap, metal reflow causes the phenomenons such as the sufficient and part of folder dirt and forging part is inabundant to improve.
Embodiment
A kind of swing check valve valve plate preparation method includes following steps:
A, casting valve plate blank, each component chemical composition 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 blank temperature of casting is down to 300 ℃, reheats to 650-760 ℃, be incubated 3-5 hour, stove is chilled to 300 ℃, is incubated 4 hours, reheats to 650-760 ℃, be incubated 17 hours, be cooled to 450 ℃ with 50 ℃/hour, again with 20 ℃/hour, be cooled to 140 ℃;
B, above-mentioned starting material are heated to 1400-1500 ℃, are fused into molten metal, detect the content of chemical ingredients, then in above-mentioned molten metal, 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, steam treatment namely gets the vacuum breaker valve plate after taking out, described steam treatment is the water atomization steam treatment, the treatment time is 4.5 hours, temperature is 600 ℃;
D, quench treatment: the vacuum breaker valve plate sent into be heated to 850-890 ℃ in the heat treatment furnace, and insulation 2-3 hour; Then, cool off with quenching oil;
E, temper: the vacuum breaker valve plate after will quenching is sent into and is heated to 300-400 ℃ in the tempering stove, insulation 50-70min;
F, bonderizing, be 180-200 ℃ with workpiece at showing tremendous enthusiasm closure temperature at normal temperatures, the employing pH value is 8 surface conditioner processing 1min, after dripping empty 1-2min, adopt phosphorization agent 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 workpiece is placed 78-100 ℃ hot water;
G, sub-zero treatment: with the container of packing into of valve plate part behind the bonderizing, add liquid nitrogen and carry out sub-zero treatment, the time is 10-12 hour.
Claims (2)
1. swing check valve valve plate preparation method is characterized in that including following steps:
A, casting valve plate blank, each component chemical composition 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 blank temperature of casting is down to 300 ℃, reheats to 650-760 ℃, be incubated 3-5 hour, stove is chilled to 300 ℃, is incubated 4 hours, reheats to 650-760 ℃, be incubated 17 hours, be cooled to 450 ℃ with 50 ℃/hour, again with 20 ℃/hour, be cooled to 140 ℃;
B, above-mentioned starting material are heated to 1400-1500 ℃, are fused into molten metal, detect the content of chemical ingredients, then in above-mentioned molten metal, 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, steam treatment namely gets the vacuum breaker valve plate after taking out, described steam treatment is the water atomization steam treatment, the treatment time is 4-5 hour, temperature is 550-650 ℃;
D, quench treatment: the vacuum breaker valve plate sent into be heated to 850-890 ℃ in the heat treatment furnace, and insulation 2-3 hour; Then, cool off with quenching oil;
E, temper: the vacuum breaker valve plate after will quenching is sent into and is heated to 300-400 ℃ in the tempering stove, insulation 50-70min;
F, bonderizing, be 180-200 ℃ with workpiece at showing tremendous enthusiasm closure temperature at normal temperatures, the employing pH value is 8 surface conditioner processing 1min, after dripping empty 1-2min, adopt phosphorization agent 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 workpiece is placed 78-100 ℃ hot water;
G, sub-zero treatment: with the container of packing into of valve plate part behind the bonderizing, 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, in sand mold, pour into a mould potting syrup by cast gate, cooled and solidified, steam treatment namely gets the vacuum breaker valve plate after taking out, and described steam treatment is the water atomization steam treatment, and the treatment time is 4.5 hours, and temperature is 600 ℃.
Priority Applications (1)
| 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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| 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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| CN102994892A true CN102994892A (en) | 2013-03-27 |
| CN102994892B CN102994892B (en) | 2016-04-06 |
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| CN201210373496.8A Active CN102994892B (en) | 2012-09-29 | 2012-09-29 | A kind of swing check valve valve plate preparation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114273617A (en) * | 2021-12-24 | 2022-04-05 | 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114273617A (en) * | 2021-12-24 | 2022-04-05 | 福建贝得阀门有限公司 | Rapid casting molding process for valve body of soft and hard sealing ball valve |
| 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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| CN102994892B (en) | 2016-04-06 |
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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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