CN102978509B - A kind of casting preparation method regulating valve body - Google Patents
A kind of casting preparation method regulating valve body Download PDFInfo
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- CN102978509B CN102978509B CN201210452882.6A CN201210452882A CN102978509B CN 102978509 B CN102978509 B CN 102978509B CN 201210452882 A CN201210452882 A CN 201210452882A CN 102978509 B CN102978509 B CN 102978509B
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Abstract
The invention discloses a kind of casting preparation method regulating valve body, include following steps: a, molten metal processed, control its chemical composition content percentage ratio as follows: C 2.4-3.2%, Si 2.0-2.5%, Mn 0.8-1.2%, P 0.06-0.08%, S 0.05-0.07%, Cr 0.25-0.35%, Ti 0.05-0.22%, Cu 0.7-0.9%, Al 0.7-0.9%, Mg 0.1-0.2%, surplus is ferrum；<b>b</b>, by cast gate to cast potting syrup in sand mold, cooled and solidified, after taking-up, namely steam treatment obtains adjustment valve body, and described steam treatment is water atomization steam treatment, and the process time is 3-4 hour, and temperature is 550-650 DEG C；Manufacturing process of the present invention has higher continuous production, and stock utilization is high, is suitable for producing in enormous quantities, reduces cost.
Description
Technical field
The present invention relates to a kind of preparation method regulating valve, particularly belong to a kind of casting preparation method regulating valve body.
Background technology
Regulate valve be useful in-50～150 DEG C the chloroazotic acid of various concentration, sulphuric acid, hydrochloric acid, Fluohydric acid. and various organic acid, strong acid, strong oxidizer, apply also for highly basic organic solvent and other corrosive gas of various concentration, the pipeline of liquid medium use.
At present, preparation regulates valve industry, and domestic spherical adjustment valve body all adopts common high-speed steel material, or rustless steel material is by machining spherical adjustment valve body.Compared with regulating valve with powder metallurgy, the adjustment valve body process velocity that common high-speed steel material or the machining of rustless steel material manufacture is slower, stock utilization is not high, and powder metallurgical technique manufacture regulates valve, not only stock utilization is high, and be unsuitable for producing in enormous quantities, before assembling uses, needing that powder metallurgy is regulated valve carry out a small amount of ground finish, a period of time rear valve body there will be seminess.
Summary of the invention
The technical problem to be solved is for regulating valve Technology present situation, and a kind of casting preparation method regulating valve body that a kind of production efficiency provided is high, manufacturing cost is relatively low.
The technical solution used in the present invention is as follows:
A kind of casting preparation method regulating valve body, includes following steps:
A, molten metal processed, control its chemical composition content percentage ratio as follows: C2.4-3.2%, Si2.0-2.5%, Mn0.8-1.2%, P0.06-0.08%, S0.05-0.07%, Cr0.25-0.35%, Ti0.05-0.22%, Cu0.7-0.9%, Al0.7-0.9%, Mg0.1-0.2%, surplus is ferrum；
B, by cast gate to cast potting syrup, cooled and solidified in sand mold, put into stove steam treatment after taking-up and namely obtain adjustment valve body, described steam treatment is water atomization steam treatment, and the process time is 3-4 hour, and in-furnace temperature is 550-650 DEG C；
C, conditioning treatment: the foundry goods that will have cleared up, be not less than 180 DEG C of loading heat-treatment furnace heating in temperature and within 10-13 hour, be warming up to 650-750 DEG C of maintenance this temperature 2-5 hour；It is again heated to be warming up to 980-1100 DEG C 8-12 hour keep this temperature 26-30 hour, is then shut off burner and makes foundry goods come out of the stove to 200-350 DEG C with stove cooling down in stove；
After d, conditioning treatment terminate, from heat-treatment furnace pull-out, foundry goods being carried out heat immediately and cuts rising head, when heat cuts rising head, casting temperature is maintained at 150-350 DEG C；
E, normalizing heat treating castings, foundry goods is loaded heat-treatment furnace heating and within 8-9 hour, is warming up to 600-650 DEG C of maintenance this temperature 2-5 hour, reheat and within 8-12 hour, be warming up to 900-1000 DEG C of maintenance this temperature 16-22 hour, then foundry goods is pulled out from stove, to cast(ing) surface atomized water spray, first spray 40-60 minute, stop 50-60 minute, then spray 15-20 minute, then stop 50-60 minute, circulation second time spray process, until less than 100 DEG C；
F, bonderizing, at 100-150 DEG C, the surface conditioner adopting pH value to be 8 processes 1min to regulating valve body, after dripping most 1-2min, adopt bonderite to process 15-20min again, after dripping most 1-2min, adopt clean water 1-2min, after dripping most 1-2min again, workpiece be placed in the hot water of 78-100 DEG C and to process 0.5-1min.
After bonderizing, carrying out subzero treatment recently: part after tempering is loaded container, add liquid nitrogen and carry out subzero treatment, the time is 11 hours, finally obtains adjustment valve finished product.
Compared with prior art, it is an advantage of the current invention 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 compression strength of improvement, is suitably applied the valve that high temperature occasion is made, the long service life of valve, and qualification rate is high, substantially increases the quality of product, is suitable for being widely popularized.
The mechanics detection performance of the present invention is as follows:
Tensile strength sigma b (MPa): >=780
Yield strength σ s (MPa): >=730
Percentage elongation δ 5 (%): >=12
Contraction percentage of area ψ (%): >=45.
Detailed description of the invention
A kind of casting preparation method regulating valve body, includes following steps:
A, molten metal processed, control its chemical composition content percentage ratio as follows: C2.4-3.2%, Si2.0-2.5%, Mn0.8-1.2%, P0.06-0.08%, S0.05-0.07%, Cr0.25-0.35%, Ti0.05-0.22%, Cu0.7-0.9%, Al0.7-0.9%, Mg0.1-0.2%, surplus is ferrum；
B, by cast gate to cast potting syrup, cooled and solidified in sand mold, put into stove steam treatment after taking-up and namely obtain adjustment valve body, described steam treatment is water atomization steam treatment, and the process time is 3-4 hour, and in-furnace temperature is 550-650 DEG C；
C, conditioning treatment: the foundry goods that will have cleared up, be not less than 180 DEG C of loading heat-treatment furnace heating in temperature and within 10-13 hour, be warming up to 650-750 DEG C of maintenance this temperature 2-5 hour；It is again heated to be warming up to 980-1100 DEG C 8-12 hour keep this temperature 26-30 hour, is then shut off burner and makes foundry goods come out of the stove to 200-350 DEG C with stove cooling down in stove；
After d, conditioning treatment terminate, from heat-treatment furnace pull-out, foundry goods being carried out heat immediately and cuts rising head, when heat cuts rising head, casting temperature is maintained at 150-350 DEG C；
E, normalizing heat treating castings, foundry goods is loaded heat-treatment furnace heating and within 8-9 hour, is warming up to 600-650 DEG C of maintenance this temperature 2-5 hour, reheat and within 8-12 hour, be warming up to 900-1000 DEG C of maintenance this temperature 16-22 hour, then foundry goods is pulled out from stove, to cast(ing) surface atomized water spray, first spray 40-60 minute, stop 50-60 minute, then spray 15-20 minute, then stop 50-60 minute, circulation second time spray process, until less than 100 DEG C；
F, bonderizing, at 100-150 DEG C, the surface conditioner adopting pH value to be 8 processes 1min to regulating valve body, after dripping most 1-2min, adopt bonderite to process 15-20min again, after dripping most 1-2min, adopt clean water 1-2min, after dripping most 1-2min again, workpiece be placed in the hot water of 78-100 DEG C and to process 0.5-1min.
After bonderizing, carrying out subzero treatment recently: part after tempering is loaded container, add liquid nitrogen and carry out subzero treatment, the time is 11 hours, finally obtains adjustment valve finished product.
The mechanics detection performance of the present invention is as follows:
Tensile strength sigma b (MPa): >=780
Yield strength σ s (MPa): >=730
Percentage elongation δ 5 (%): >=12
Contraction percentage of area ψ (%): >=45.
Claims (1)
1. the casting preparation method regulating valve body, it is characterised in that include following steps:
A, molten metal processed, control its chemical composition content percentage ratio as follows: C2.4-3.2%, Si2.0-2.5%, Mn0.8-1.2%, P0.06-0.08%, S0.05-0.07%, Cr0.25-0.35%, Ti0.05-0.22%, Cu0.7-0.9%, Al0.7-0.9%, Mg0.1-0.2%, surplus is ferrum；
B, by cast gate to cast potting syrup, cooled and solidified in sand mold, put into stove steam treatment after taking-up and namely obtain adjustment valve body, described steam treatment is water atomization steam treatment, and the process time is 3-4 hour, and in-furnace temperature is 550-650 DEG C；
C, conditioning treatment: the foundry goods that will have cleared up, be not less than 180 DEG C of loading heat-treatment furnace heating in temperature and within 10-13 hour, be warming up to 650-750 DEG C of maintenance this temperature 2-5 hour；It is again heated to be warming up to 980-1100 DEG C 8-12 hour keep this temperature 26-30 hour, is then shut off burner and makes foundry goods come out of the stove to 200-350 DEG C with stove cooling down in stove；
After d, conditioning treatment terminate, from heat-treatment furnace pull-out, foundry goods being carried out heat immediately and cuts rising head, when heat cuts rising head, casting temperature is maintained at 150-350 DEG C；
E, normalizing heat treating castings, foundry goods is loaded heat-treatment furnace heating and within 8-9 hour, is warming up to 600-650 DEG C of maintenance this temperature 2-5 hour, reheat and within 8-12 hour, be warming up to 900-1000 DEG C of maintenance this temperature 16-22 hour, then foundry goods is pulled out from stove, to cast(ing) surface atomized water spray, first spray 40-60 minute, stop 50-60 minute, then spray 15-20 minute, then stop 50-60 minute, circulation second time spray process, until less than 100 DEG C；
F, bonderizing, at 100-150 DEG C, the surface conditioner adopting pH value to be 8 processes 1min to regulating valve body, after dripping most 1-2min, adopt bonderite to process 15-20min again, after dripping most 1-2min, adopt clean water 1-2min, after dripping most 1-2min again, workpiece is placed in the hot water of 78-100 DEG C and processes 0.5-1min；
After bonderizing, carrying out subzero treatment: part after tempering is loaded container, add liquid nitrogen and carry out subzero treatment, the time is 11 hours, finally obtains adjustment valve finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210452882.6A CN102978509B (en) | 2012-11-13 | 2012-11-13 | A kind of casting preparation method regulating valve body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210452882.6A CN102978509B (en) | 2012-11-13 | 2012-11-13 | A kind of casting preparation method regulating valve body |
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| Publication Number | Publication Date |
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| CN102978509A CN102978509A (en) | 2013-03-20 |
| CN102978509B true CN102978509B (en) | 2016-07-06 |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1009283B (en) * | 1988-10-20 | 1990-08-22 | 山东省新材料研究所 | Cast iron material for glass bottle forming die |
| DE19654893C2 (en) * | 1996-07-25 | 1999-06-10 | Federal Mogul Burscheid Gmbh | Piston rings of internal combustion engines made of a cast iron alloy |
| CN1067443C (en) * | 1998-10-15 | 2001-06-20 | 冶金工业部北京冶金设备研究院 | Multi-element w-alloy cast iron roll collar and its making technology |
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