CN102979956B - A kind of warm forging forming method of throttle valve stem - Google Patents
A kind of warm forging forming method of throttle valve stem Download PDFInfo
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- CN102979956B CN102979956B CN201210452885.XA CN201210452885A CN102979956B CN 102979956 B CN102979956 B CN 102979956B CN 201210452885 A CN201210452885 A CN 201210452885A CN 102979956 B CN102979956 B CN 102979956B
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a kind of warm forging forming method of throttle valve stem, include following steps: a, cast bar blank, first the steel scrap of 13 parts is dropped in middle frequency furnace and be fused into molten steel, add again and add carbon agent, when temperature in middle frequency furnace rises to 1100 ~ 1200 DEG C, drop into the molybdenum of 0.15 part again, the nickel of 0.25 part, the steel scrap of 18 parts, 4 parts of useless parts, the foundry returns of the pig iron of 15 parts and 13 parts, then deslagging, 0.7 part, ferromanganese is added after deslagging, Antaciron 1.8 parts, now, sample analysis from the molten iron in middle frequency furnace, add material again, tap a blast furnace when temperature in middle frequency furnace rises to 1400 DEG C, the copper of 0.5 part is added ladle with molten iron, pour into a mould, the bar slab temperature of moulding by casting is down to 350 DEG C, then is heated to 670-780 DEG C, insulation 3-5 hour, and stove is chilled to 300 DEG C, be incubated 3 hours, then be heated to 650-760 DEG C, be incubated 10 hours, be cooled to 400 DEG C with 45 DEG C/h, then with 25 DEG C/h, be cooled to 150 DEG C, powdered metallurgical material of the present invention and manufacturing process have higher continuous production, and stock utilization 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 throttle valve, specifically belong to a kind of warm forging forming method of throttle valve stem.
Background technique
Throttle valve is the controlling component in fluid delivery system, has the functions such as shunting or overflow pressure relief.For the valve of liquid control system, various valves used from the simplest stop valve to very complicated robot control system(RCS), its kind and specification are quite various.Valve can be used for the flowing controlling all kinds fluids such as air, water, steam, various Korrosionsmedium, mud, oil product, liquid metal and radiating medium.Not only material preparation process is poor for current throttle valve, and is unsuitable for producing in enormous quantities, needs to carry out fine grinding to valve rod, easily occur the phenomenon of crackle in production process before assembling uses.
Summary of the invention
Technical problem to be solved by this invention is for throttle valve process engineering present situation, and the warm forging forming method of a kind of throttle valve stem 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 warm forging forming method for throttle valve stem, includes following steps:
A, cast bar blank, first the steel scrap of 13 parts is dropped in middle frequency furnace and be fused into molten steel, when temperature in middle frequency furnace rises to 1100 ~ 1200 DEG C, drop into the molybdenum of 0.15 part, the nickel of 0.25 part again, the steel scrap of 18 parts, 4 parts of useless parts, the pig iron of 15 parts and foundry returns of 13 parts, then deslagging, 0.7 part, ferromanganese, Antaciron 1.8 parts is added after deslagging, now, sample analysis from the molten iron in middle frequency furnace, tap a blast furnace when temperature in middle frequency furnace rises to 1400 DEG C, the copper of 0.5 part is added ladle with molten iron, pours into a mould; The bar slab temperature of moulding by casting is down to 350 DEG C, then is heated to 670-780 DEG C, insulation 3-5 hour, and stove is chilled to 300 DEG C, be incubated 3 hours, then be heated to 650-760 DEG C, be incubated 10 hours, be cooled to 400 DEG C with 45 DEG C/h, then with 25 DEG C/h, be cooled to 150 DEG C;
The bar of b, casting adopts cold temperature precision forging forming method, and concrete technology is that the warm forging of bar forging stock is pre-formed into valve rod, is preheated to 200 DEG C ~ 250 DEG C, and leaching aquadag is heated to 800 DEG C ~ 850 DEG C again, carries out warm forging shaping;
C, Quenching Treatment: throttle valve stem 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;
D, temper: the throttle valve stem after quenching is sent in tempering furnace and is heated to 300-400 DEG C, insulation 50-70min;
E, phosphorating treatment, be 180-200 DEG C by throttle valve stem at showing tremendous enthusiasm closure temperature at normal temperatures, employing pH value is the surface conditioner process 1min of 8, after the empty 1-2min of fluid drips, adopt bonderite process 15-20min, then after the empty 1-2min of fluid drips, adopt clean water 1-2min, again after the empty 1-2min of fluid drips, process 0.5-1min with hot water throttle valve stem being placed in 78-100 DEG C.
Described phosphorating treatment, be 190 DEG C by throttle valve stem at showing tremendous enthusiasm closure temperature at normal temperatures, employing pH value is the surface conditioner process 1min of 8, after the empty 1.5min of fluid drips, adopt bonderite process 17min, then after the empty 1.5min of fluid drips, adopt clean water 1.5min, again after the empty 1.5min of fluid drips, process 0.7min with hot water throttle valve stem 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 parts by present 65 parts, power consumption reduces about 70 parts, 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): >=860
Yield strength σ s (MPa): >=930
Elongation percentage δ 5 (part): >=12
Impact energy Ak v (J): >=65
Hardness :≤243HB.
Embodiment
A warm forging forming method for throttle valve stem, includes following steps:
A, cast bar blank, first the steel scrap of 13 parts is dropped in middle frequency furnace and be fused into molten steel, when temperature in middle frequency furnace rises to 1100 ~ 1200 DEG C, drop into the molybdenum of 0.15 part, the nickel of 0.25 part again, the steel scrap of 18 parts, 4 parts of useless parts, the pig iron of 15 parts and foundry returns of 13 parts, then deslagging, 0.7 part, ferromanganese, Antaciron 1.8 parts is added after deslagging, now, sample analysis from the molten iron in middle frequency furnace, tap a blast furnace when temperature in middle frequency furnace rises to 1400 DEG C, the copper of 0.5 part is added ladle with molten iron, pours into a mould; The bar slab temperature of moulding by casting is down to 350 DEG C, then is heated to 670-780 DEG C, insulation 3-5 hour, and stove is chilled to 300 DEG C, be incubated 3 hours, then be heated to 650-760 DEG C, be incubated 10 hours, be cooled to 400 DEG C with 45 DEG C/h, then with 25 DEG C/h, be cooled to 150 DEG C; Ferrosilicon and Silicon in Ferromanganese, Fe content are respectively 30%, 55%.
The bar of b, casting adopts cold temperature precision forging forming method, and concrete technology is that the warm forging of bar forging stock is pre-formed into valve rod, is preheated to 200 DEG C ~ 250 DEG C, and leaching aquadag is heated to 800 DEG C ~ 850 DEG C again, carries out warm forging shaping;
C, Quenching Treatment: throttle valve stem 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;
D, temper: the throttle valve stem after quenching is sent in tempering furnace and is heated to 300-400 DEG C, insulation 50-70min;
E, phosphorating treatment, be 190 DEG C by throttle valve stem at showing tremendous enthusiasm closure temperature at normal temperatures, employing pH value is the surface conditioner process 1min of 8, after the empty 1.5min of fluid drips, adopt bonderite process 17min, then after the empty 1.5min of fluid drips, adopt clean water 1.5min, again after the empty 1.5min of fluid drips, process 0.7min with hot water throttle valve stem being placed in 90 DEG C.
Claims (2)
1. a warm forging forming method for throttle valve stem, is characterized in that including following steps:
A, cast bar blank, first the steel scrap of 13 parts is dropped in middle frequency furnace and be fused into molten steel, when temperature in middle frequency furnace rises to 1100 ~ 1200 DEG C, drop into the molybdenum of 0.15 part, the nickel of 0.25 part, the steel scrap of 18 parts, 4 parts of useless parts, the pig iron of 15 parts and casting foundry returns of 13 parts again, then deslagging, 0.7 part, ferromanganese, Antaciron 1.8 parts is added after deslagging, now, sample analysis from the molten iron in middle frequency furnace, tap a blast furnace when temperature in middle frequency furnace rises to 1400 DEG C, the copper of 0.5 part is added ladle with molten iron, pours into a mould; The bar slab temperature of moulding by casting is down to 350 DEG C, then is heated to 670-780 DEG C, insulation 3-5 hour, and stove is chilled to 300 DEG C, be incubated 3 hours, then be heated to 650-760 DEG C, be incubated 10 hours, be cooled to 400 DEG C with 45 DEG C/h, then with 25 DEG C/h, be cooled to 150 DEG C;
The bar blank of b, casting adopts cold temperature precision forging forming method, and concrete technology is that the warm forging of bar blank is pre-formed into valve rod, is preheated to 200 DEG C ~ 250 DEG C, and leaching aquadag is heated to 800 DEG C ~ 850 DEG C again, carries out warm forging shaping;
C, Quenching Treatment: throttle valve stem 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;
D, temper: the throttle valve stem after quenching is sent in tempering furnace and is heated to 300-400 DEG C, insulation 50-70min;
E, phosphorating treatment: the showing tremendous enthusiasm closure temperature of throttle valve stem is 180-200 DEG C at normal temperatures, employing pH value is the surface conditioner process 1min of 8, after the empty 1-2min of fluid drips, adopt bonderite process 15-20min, again after the empty 1-2min of fluid drips, adopt clean water 1-2min, then after the empty 1-2min of fluid drips, hot water throttle valve stem being placed in 78-100 DEG C processes 0.5-1min.
2. the warm forging forming method of a kind of throttle valve stem according to claim 1, it is characterized in that: described phosphorating treatment, the showing tremendous enthusiasm closure temperature of throttle valve stem is 190 DEG C at normal temperatures, employing pH value is the surface conditioner process 1min of 8, after the empty 1.5min of fluid drips, adopts bonderite process 17min, again after the empty 1.5min of fluid drips, adopt clean water 1.5min, then after the empty 1.5min of fluid drips, hot water throttle valve stem being placed in 90 DEG C processes 0.7min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210452885.XA CN102979956B (en) | 2012-11-13 | 2012-11-13 | A kind of warm forging forming method of throttle valve stem |
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| CN201210452885.XA CN102979956B (en) | 2012-11-13 | 2012-11-13 | A kind of warm forging forming method of throttle valve stem |
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| CN102979956A CN102979956A (en) | 2013-03-20 |
| CN102979956B true CN102979956B (en) | 2015-11-25 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106111860B (en) * | 2016-06-30 | 2018-05-04 | 安徽省瑞杰锻造有限责任公司 | Q345E heat processing techniques |
| CN111421089A (en) * | 2020-03-31 | 2020-07-17 | 江苏大洋精锻有限公司 | Warm forging forming method for throttle valve rod |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53137815A (en) * | 1977-05-09 | 1978-12-01 | Hitachi Metals Ltd | Method of producing pearlite spheroidal graphite cast iron |
| US4731112A (en) * | 1986-02-19 | 1988-03-15 | Midrex International, B.V. Rotterdam, Zurich Branch | Method of producing ferro-alloys |
| CN1337331A (en) * | 2000-08-04 | 2002-02-27 | 江苏太平洋精密锻造有限公司 | Process of making blank of inner spider for constant-speed cardan of automobile |
| CN101074472A (en) * | 2006-05-18 | 2007-11-21 | 中国船舶重工集团公司第七二五研究所 | Ultrahigh-strength and high-toughness welded cast steel |
| CN101603143A (en) * | 2009-07-23 | 2009-12-16 | 芜湖市金贸流体科技股份有限公司 | High temperature resistant nodular cast iron pipe fittings and production method thereof |
| CN101722406A (en) * | 2009-12-31 | 2010-06-09 | 上海新闵重型锻造有限公司 | Method for manufacturing pin shaft through forging |
| CN102220543A (en) * | 2011-06-24 | 2011-10-19 | 刘文喜 | High-strength wear-resisting nodular cast iron applied on water pump |
| CN102367558A (en) * | 2011-10-24 | 2012-03-07 | 山东双轮股份有限公司 | Boric low alloy wear resistant steel for pump |
-
2012
- 2012-11-13 CN CN201210452885.XA patent/CN102979956B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53137815A (en) * | 1977-05-09 | 1978-12-01 | Hitachi Metals Ltd | Method of producing pearlite spheroidal graphite cast iron |
| US4731112A (en) * | 1986-02-19 | 1988-03-15 | Midrex International, B.V. Rotterdam, Zurich Branch | Method of producing ferro-alloys |
| CN1337331A (en) * | 2000-08-04 | 2002-02-27 | 江苏太平洋精密锻造有限公司 | Process of making blank of inner spider for constant-speed cardan of automobile |
| CN101074472A (en) * | 2006-05-18 | 2007-11-21 | 中国船舶重工集团公司第七二五研究所 | Ultrahigh-strength and high-toughness welded cast steel |
| CN101603143A (en) * | 2009-07-23 | 2009-12-16 | 芜湖市金贸流体科技股份有限公司 | High temperature resistant nodular cast iron pipe fittings and production method thereof |
| CN101722406A (en) * | 2009-12-31 | 2010-06-09 | 上海新闵重型锻造有限公司 | Method for manufacturing pin shaft through forging |
| CN102220543A (en) * | 2011-06-24 | 2011-10-19 | 刘文喜 | High-strength wear-resisting nodular cast iron applied on water pump |
| CN102367558A (en) * | 2011-10-24 | 2012-03-07 | 山东双轮股份有限公司 | Boric low alloy wear resistant steel for pump |
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