CN102965563A - Casting method of valve body of ball check valve - Google Patents
Casting method of valve body of ball check valve Download PDFInfo
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- CN102965563A CN102965563A CN2012104529941A CN201210452994A CN102965563A CN 102965563 A CN102965563 A CN 102965563A CN 2012104529941 A CN2012104529941 A CN 2012104529941A CN 201210452994 A CN201210452994 A CN 201210452994A CN 102965563 A CN102965563 A CN 102965563A
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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
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Abstract
The invention discloses a casting method of a valve body of a ball check valve, which comprises the following steps; putting 12 parts of scrap steel into an intermediate-frequency electric furnace, and melting to obtain molten steel; when the temperature in the intermediate-frequency electric furnace rises to 1000-1200 DEG C, inputting 0.15 part of molybdenum, 28 parts of scrap steel, 4 parts of scrap machine elements, 21 parts of pig iron and 18 parts of returns; then deslagging, and adding 0.7 part of manganese iron and 1.8 parts of silicon iron alloy; performing sample analysis on the molten iron in the intermediate-frequency electric furnace, and supplementing the materials; and when the temperature in the intermediate-frequency electric furnace rises to 1400 DEG C, tapping, adding 0.5 part of copper into an iron ladle along with the molten iron, and casting. The powder metallurgical material and the manufacturing process disclosed by the invention have high production continuity and high material utilization rate, are suitable for mass production and can reduce the cost.
Description
Technical field
The present invention relates to a kind of preparation method of ball non-return valve, specifically belong to a kind of castmethod of ball non-return valve valve body.
Background technology
The forged steel vacuum breaker has two kinds of body lids to connect design form: the first is that the body cap bolt connects the forged steel vacuum breaker, and by the valve of this type of attachment design, its valve body is connected with bolt with valve gap, the spiral wound gasket sealing, and advantage is to be convenient to maintenance; The full weldering sealing of the second body lid forged steel vacuum breaker, by the valve of this type of attachment design, its valve body is connected with the spiral shell mosquito with valve gap, full weldering sealing, advantage is without leaking.Forged steel vacuum breaker flap form also has respectively the shape of damming, aciculiform, spherical you can be according to our valve of practical situation reasonable selection.
At present, preparation vacuum breaker industry, domestic ball non-return valve valve body all adopts common rapid steel material, or the stainless steel material is by machining ball non-return valve valve body.Compare with the powder metallurgy seat of stop valve, the ball non-return valve valve body 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 unsuitable for producing in enormous quantities, before assembling is used, need the powder metallurgy valve body is carried out a small amount of ground finish, be not suitable for present production requirement.
Summary of the invention
Technical problem to be solved by this invention is for vacuum breaker Technology present situation, and the castmethod of a kind of ball non-return valve valve body 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 castmethod of ball non-return valve valve body includes following steps:
A, steel scrap that first will 12 parts drop in the middle frequency furnace and are fused into molten steel, when treating that the interior temperature of middle frequency furnace rises to 1000～1200 ℃, drop into again 0.15 part molybdenum, 28 parts scrap iron, 4 parts of useless parts, 21 parts the pig iron and 18 parts casting foundry returns, then deslagging, add 0.7 part in ferromanganese, 1.8 parts of ferro-silicons behind the deslagging, at this moment, sampling analysis the molten iron in middle frequency furnace, treat to tap a blast furnace when the interior temperature of middle frequency furnace rises to 1400 ℃, 0.5 part copper is added hot metal ladle with molten iron, pour into a mould;
b, valve body that above-mentioned steps is obtained carries out ground, deburring;
C, quench treatment: check valve body sent into be heated to 850-890 ℃ in the heat treatment furnace, and insulation 2-3 hour; Then, cool off with quenching oil;
D, temper: the check valve body after will quenching is sent into and is heated to 300-400 ℃ in the tempering stove, insulation 50-70min;
E, sub-zero treatment: with the container of packing into of part after the tempering, add liquid nitrogen and carry out sub-zero treatment, the time is 11-12 hour
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 most 1-2min, adopt phosphorization agent to process 15-20min, again after dripping most 1-2min, adopt clear water to clean 1-2min, drip again most 1-2min after, process 0.5-1min workpiece is placed 78-100 ℃ hot water.
Described bonderizing: be 190 ℃ with workpiece at showing tremendous enthusiasm closure temperature at normal temperatures, the employing pH value is 8 surface conditioner processing 1min, after dripping most 1.5min, adopt phosphorization agent to process 17min, again after dripping most 1.5min, adopt clear water to clean 1.5min, drip again most 1.5min after, process 0.7min workpiece is placed 90 ℃ hot water.
Compared with prior art, the invention has the advantages that:
The present invention passes through technique scheme, one-piece construction is scientific and reasonable, the corresponding energy consumption that reduced has reduced materials consumption and cost and has dropped into, and working accuracy improves greatly, compared with prior art material use efficiency is brought up to more than 90% by present 65%, power consumption reduces about 70%, and recruitment reduces 3/4ths, and a machine tool two people operate the malleable workpiece of split run more than 550, improve about 4 times of work efficiency, the positively effect highly significant of generation.
It is as follows that mechanical property of the present invention detects data:
Tensile strength sigma b (MPa): 〉=810
Yield strength σ s (MPa): 〉=690
Elongation δ 5 (%): 〉=13
Notched bar impact strength α kv (J/cm2): 〉=58
Hardness :≤213HB.
Embodiment
A kind of castmethod of ball non-return valve valve body includes following steps:
A, steel scrap that first will 12 parts drop in the middle frequency furnace and are fused into molten steel, when treating that the interior temperature of middle frequency furnace rises to 1000～1200 ℃, drop into again 0.15 part molybdenum, 28 parts scrap iron, 4 parts of useless parts, 21 parts the pig iron and 18 parts casting foundry returns, then deslagging, add 0.7 part in ferromanganese, 1.8 parts of ferro-silicons behind the deslagging, at this moment, sampling analysis the molten iron in middle frequency furnace, treat to tap a blast furnace when the interior temperature of middle frequency furnace rises to 1400 ℃, 0.5 part copper is added hot metal ladle with molten iron, pour into a mould; Manganese, silicone content are 30% in ferromanganese and the ferrosilicon.
b, valve body that above-mentioned steps is obtained carries out ground, deburring;
C, quench treatment: check valve body sent into be heated to 850-890 ℃ in the heat treatment furnace, and insulation 2-3 hour; Then, cool off with quenching oil;
D, temper: the check valve body after will quenching is sent into and is heated to 300-400 ℃ in the tempering stove, insulation 50-70min;
E, sub-zero treatment: with the container of packing into of part after the tempering, add liquid nitrogen and carry out sub-zero treatment, the time is 11-12 hour
F, described bonderizing: be 190 ℃ with workpiece at showing tremendous enthusiasm closure temperature at normal temperatures, the employing pH value is 8 surface conditioner processing 1min, after dripping most 1.5min, adopt phosphorization agent to process 17min, again after dripping most 1.5min, adopt clear water to clean 1.5min, drip again most 1.5min after, process 0.7min workpiece is placed 90 ℃ hot water.
It is as follows that mechanical property of the present invention detects data:
Tensile strength sigma b (MPa): 〉=810
Yield strength σ s (MPa): 〉=690
Elongation δ 5 (%): 〉=13
Notched bar impact strength α kv (J/cm2): 〉=58
Hardness :≤213HB.
Claims (2)
1. the castmethod of a ball non-return valve valve body is characterized in that including following steps:
A, steel scrap that first will 12 parts drop in the middle frequency furnace and are fused into molten steel, when treating that the interior temperature of middle frequency furnace rises to 1000～1200 ℃, drop into again 0.15 part molybdenum, 28 parts scrap iron, 4 parts of useless parts, 21 parts the pig iron and 18 parts casting foundry returns, then deslagging, add 0.7 part in ferromanganese, 1.8 parts of ferro-silicons behind the deslagging, at this moment, sampling analysis the molten iron in middle frequency furnace, treat to tap a blast furnace when the interior temperature of middle frequency furnace rises to 1400 ℃, 0.5 part copper is added hot metal ladle with molten iron, pour into a mould;
b, valve body that above-mentioned steps is obtained carries out ground, deburring;
C, quench treatment: check valve body sent into be heated to 850-890 ℃ in the heat treatment furnace, and insulation 2-3 hour; Then, cool off with quenching oil;
D, temper: the check valve body after will quenching is sent into and is heated to 300-400 ℃ in the tempering stove, insulation 50-70min;
E, sub-zero treatment: with the container of packing into of part after the tempering, add liquid nitrogen and carry out sub-zero treatment, the time is 11-12 hour
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 most 1-2min, adopt phosphorization agent to process 15-20min, again after dripping most 1-2min, adopt clear water to clean 1-2min, drip again most 1-2min after, process 0.5-1min workpiece is placed 78-100 ℃ hot water.
2. the castmethod of a kind of ball non-return valve valve body according to claim 1 is characterized in that:
Described bonderizing: be 190 ℃ with workpiece at showing tremendous enthusiasm closure temperature at normal temperatures, the employing pH value is 8 surface conditioner processing 1min, after dripping most 1.5min, adopt phosphorization agent to process 17min, again after dripping most 1.5min, adopt clear water to clean 1.5min, drip again most 1.5min after, process 0.7min workpiece is placed 90 ℃ hot water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012104529941A CN102965563A (en) | 2012-11-13 | 2012-11-13 | Casting method of valve body of ball check valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104529941A CN102965563A (en) | 2012-11-13 | 2012-11-13 | Casting method of valve body of ball check valve |
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| CN102965563A true CN102965563A (en) | 2013-03-13 |
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| CN2012104529941A Pending CN102965563A (en) | 2012-11-13 | 2012-11-13 | Casting method of valve body of ball check valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061011B (en) * | 2014-06-23 | 2016-11-30 | 洛阳洛北重工机械有限公司 | Hydraulic support propulsive mechanism union joint casting method |
| CN107214290A (en) * | 2017-06-22 | 2017-09-29 | 霍山县忠福机电科技有限公司 | A kind of truck brake rouses casting technique |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101440459A (en) * | 2008-12-25 | 2009-05-27 | 重庆江通机械有限责任公司 | Cast steel material for mine support and preparation 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 |
| CN102744377A (en) * | 2012-06-08 | 2012-10-24 | 安徽省繁昌县皖南阀门铸造有限公司 | Method for casting corrosion-resisting butterfly valve body |
-
2012
- 2012-11-13 CN CN2012104529941A patent/CN102965563A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101440459A (en) * | 2008-12-25 | 2009-05-27 | 重庆江通机械有限责任公司 | Cast steel material for mine support and preparation 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 |
| CN102744377A (en) * | 2012-06-08 | 2012-10-24 | 安徽省繁昌县皖南阀门铸造有限公司 | Method for casting corrosion-resisting butterfly valve body |
Non-Patent Citations (1)
| Title |
|---|
| 罗永新: "《数控加工工艺》", 30 November 2010 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061011B (en) * | 2014-06-23 | 2016-11-30 | 洛阳洛北重工机械有限公司 | Hydraulic support propulsive mechanism union joint casting method |
| CN107214290A (en) * | 2017-06-22 | 2017-09-29 | 霍山县忠福机电科技有限公司 | A kind of truck brake rouses casting technique |
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Application publication date: 20130313 |