CN106399642A - Special high-frequency quench cooling process for alloy steel - Google Patents

Special high-frequency quench cooling process for alloy steel Download PDF

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Publication number
CN106399642A
CN106399642A CN201611016938.8A CN201611016938A CN106399642A CN 106399642 A CN106399642 A CN 106399642A CN 201611016938 A CN201611016938 A CN 201611016938A CN 106399642 A CN106399642 A CN 106399642A
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CN
China
Prior art keywords
cooling
induction coil
special
thermal treatment
heat treated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201611016938.8A
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Chinese (zh)
Inventor
张连华
马海军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGSU HUAWEI MACHINERY MANUFACTURING Co Ltd
Original Assignee
JIANGSU HUAWEI MACHINERY MANUFACTURING Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by JIANGSU HUAWEI MACHINERY MANUFACTURING Co Ltd filed Critical JIANGSU HUAWEI MACHINERY MANUFACTURING Co Ltd
Priority to CN201611016938.8A priority Critical patent/CN106399642A/en
Publication of CN106399642A publication Critical patent/CN106399642A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06Surface hardening
    • C21D1/09Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18Hardening; Quenching with or without subsequent tempering
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62Quenching devices
    • C21D1/667Quenching devices for spray quenching
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention relates to a special high-frequency quench cooling process for alloy steel. The process comprises the steps of placing a heated thermal treatment workpiece into a gas flowing at high speed, and charging a proper quantity of ammonia into the gas as required to realize rapid cooling. Meanwhile, gas cooling is adopted on the surface of the thermal treatment workpiece, so that not only is the problem of workpiece heating caused by high-speed temperature reduction during water cooling overcome, but also the problem of high price of the adopted cooling oil is solved. According to the special high-frequency quench cooling process, the thermal treatment workpiece is placed in a special fixture, the thermal treatment workpiece is clamped by the special fixture to rotate and move; and the outer side of the thermal treatment workpiece is sleeved by an induction coil, a plurality of cooling medium flow through holes are axially formed in the induction coil, one end of each medium flow through hole is connected with an air valve of compressed air, and the other end of each medium flow through hole communicates with the space of the outer surface. The special high-frequency quench cooling process for alloy steel has the advantages of simple structure and convenience in operation and also has the advantages of safety and reliability, economy and practicability, low cost and good surface quenching quality.

Description

A kind of special steel alloy high-frequency quenching cooling technique
Technical field
The present invention relates to metal heating processing technology technical field, specially a kind of special steel alloy to high alloy content enters The cooling technique of row high-frequency quenching.
Background technology
It is frequently encountered by the special alloy steel higher containing alloying elements such as Ni, Cr, V, Mo in high frequency heat treatment quenching process Surface hardening part, this quenching part has on high-frequency hardening machine sees that oil catches fire, meets the characteristic that water ftractures, and it is through high-frequency induction electricity Stream, by after rapid for surface heating, needs using quenching oil or non-aqueous medium as its cooling medium, otherwise can not reach surface The technical requirements of quenching.Oil cooling can catch fire, water cooling excessive velocities, and quenching workpiece occurs crackle or cracking phenomena;Natural Air rate of cooling is excessively slow, and the case hardness of quenching workpiece does not reach.The traditional method solving the above problems is very simple, buys symbol Close the quenching liquid requiring as cooling medium.However, the domestic 1-2 of the market price of one ton of finished product quenching medium ten thousand, import 3-5 Ten thousand RMB, its price is costly, relatively costly, and cost performance is relatively low, cannot collect on High-frequency machine again, it would therefore be highly desirable to newly Quenching cooling technique solve the above problems.
Content of the invention
It is an object of the invention to provide a kind of special steel alloy high-frequency quenching cooling technique is it is intended to meet special steel alloy Surface high frequency quenches the requirement of quality, and makes that its technique is advanced, structurally simple, economical practicality.
The technical scheme is that:A kind of cooling technique of special steel alloy high-frequency quenching, this process unit includes specially With fixture, heat treated part, induction coil and compressed air container, described heat treated part is arranged in special fixture, described Special fixture clamping heat treated part rotates and mobile;Described induction coil is enclosed within the outside of heat treated part, described sensing There is certain spacing between coil and heat treated part, in described induction coil, be axially arranged with several cooling medium through flow holes, Described medium through flow hole one end is connected with the air valve of compressed gas, and the other end is connected with the space of outer surface;Its technique includes Following steps:
Step one is by quenching workpiece clamping in the induction coil of induction heating equipment;
Being passed through high frequency induction current in step 2 induction coil makes surface of the work heat rapidly;
When step 3 workpiece surface temperature reaches hardening heat, cut off induction coil power supply;
Step 4 adds quenching medium in surface of the work,
It is characterized in that:
Cooling medium in described step 4 is compressed gas;
Described compressed gas are compressed air;
Described compressed gas are the mixed gas of air and ammonia;
Described compressed gas can timely adjustment pressure.
The present invention adopts compressed air as the cooling medium of induced surface hardening, its not only have structure simple, Easy to operate advantage, also has safe and reliable, economical and practical, with low cost, the measured advantage of surface hardening matter.
Brief description
Accompanying drawing 1 is assembly of the invention structural representation.
In fig. 1:1 is compressed air container, 2 is pipeline, 3 is solenoid directional control valve, 4 is induction coil, 5 is heat treatment Workpiece, 6 be special fixture.
Specific embodiment
Below in conjunction with accompanying drawing, explanation is further explained to the present invention:
First by heat treated part 5 clamping in special fixture 6, and with special fixture 6 by heat treated part 5 induction coil 4; Secondly being passed through high frequency induction current in induction coil 4 makes the rapid heat temperature raising in heat treated part 5 surface;3rd works as heat treatment work When part 5 surface temperature reaches hardening heat, cut off induction coil 4 power supply;4th air valve opening compressed gas, compressed gas are led to Cross the surface that matter through flow hole flows into heat treated part 5, heat treated part 5 surface adds this quenching medium of compressed gas.
As shown in Figure 1, heat treated part 5 is clamped and rotates and move by special fixture 6;Induction coil 4 has distance ground Cover on the periphery of heat treated part 5, so that heat treated part 5 is produced high frequency induction current and obtain heating, and in induction coil 4 It is provided with the cooling medium through flow hole that several axis point to heat treated part 5;Several through flow holes in induction coil 4 pass through pipe Road 2 is communicated with compressed air 1, and is provided with solenoid directional control valve 3 on pipeline 2, disconnects for dead electricity under its normality;Compressed air 1 adds It is the mixed gas containing ammonia after ammonification gas.
During present invention work, heat treated part 5 is obtained by induction coil 4 and heats rapidly and reach hardening heat;Close The power supply of induction coil 4 makes solenoid directional control valve 3 be in "on" position simultaneously, and the mixed gas that pipeline 2 is contained within ammonia are sprayed rapidly It is mapped to the surface of heat treated part 5 so as to obtain the purpose that surface layer hardens.
The present invention makes heat treated part 5 using the mixing blast injection containing ammonia to the surface of heat treated part 5 Be obtained in that faster than natural ventilating air rate of cooling during cooling, the cooling effect slower than cooling oil rate of cooling such that it is able to The cooling reaching special alloy steel high-frequency surface hardening requires.

Claims (3)

1. a kind of cooling technique of special steel alloy high-frequency quenching, in this technique, device includes special fixture, heat treated part, sense Answer coil and compressed air container, described heat treated part is arranged in special fixture, described special fixture clamps heat treatment work Part rotates and mobile;Described induction coil is enclosed within the outside of heat treated part, between described induction coil and heat treated part Have certain spacing, in described induction coil, be axially arranged with several cooling medium through flow holes, described medium through flow hole one end with The air valve of compressed gas is connected, and the other end is connected with the space of outer surface;Its technique comprises the following steps:
Step one is by quenching workpiece clamping in the induction coil of induction heating equipment;
Being passed through high frequency induction current in step 2 induction coil makes surface of the work heat rapidly;
When step 3 workpiece surface temperature reaches hardening heat, cut off induction coil power supply;
Step 4 adds quenching medium in surface of the work,
It is characterized in that:
Cooling medium in described step 4 is compressed gas.
2. a kind of special steel alloy high-frequency quenching according to claim 1 cooling technique it is characterised in that:Described compression Gas is compressed air.
3. a kind of special steel alloy high-frequency quenching according to claim 1 and 2 cooling technique it is characterised in that:Described Compressed gas are the mixed gas of air and ammonia.
CN201611016938.8A 2016-11-18 2016-11-18 Special high-frequency quench cooling process for alloy steel Pending CN106399642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611016938.8A CN106399642A (en) 2016-11-18 2016-11-18 Special high-frequency quench cooling process for alloy steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611016938.8A CN106399642A (en) 2016-11-18 2016-11-18 Special high-frequency quench cooling process for alloy steel

Publications (1)

Publication Number Publication Date
CN106399642A true CN106399642A (en) 2017-02-15

Family

ID=58068599

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611016938.8A Pending CN106399642A (en) 2016-11-18 2016-11-18 Special high-frequency quench cooling process for alloy steel

Country Status (1)

Country Link
CN (1) CN106399642A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1844415A (en) * 2005-04-08 2006-10-11 沈阳气体压缩机股份有限公司 17-4PH steel surface reinforcement method
CN201614385U (en) * 2009-12-02 2010-10-27 梁百仁 Numerical control induction quenching machine tool
CN101886164A (en) * 2009-05-13 2010-11-17 天津市天瑞硬化工程有限公司 Induction heating controlled quenching technology for gear and machine tool
CN101892364A (en) * 2010-06-08 2010-11-24 优德精密工业(昆山)有限公司 High-frequency surface quenching machine
CN201793637U (en) * 2010-05-14 2011-04-13 陕西巨基实业有限公司 High-frequency quenching machine tool for shaft part
CN102676785A (en) * 2012-06-08 2012-09-19 荆州环球汽车零部件制造有限公司 Induction hardening process capable of hardening hard-alloy cast iron camshaft

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1844415A (en) * 2005-04-08 2006-10-11 沈阳气体压缩机股份有限公司 17-4PH steel surface reinforcement method
CN101886164A (en) * 2009-05-13 2010-11-17 天津市天瑞硬化工程有限公司 Induction heating controlled quenching technology for gear and machine tool
CN201614385U (en) * 2009-12-02 2010-10-27 梁百仁 Numerical control induction quenching machine tool
CN201793637U (en) * 2010-05-14 2011-04-13 陕西巨基实业有限公司 High-frequency quenching machine tool for shaft part
CN101892364A (en) * 2010-06-08 2010-11-24 优德精密工业(昆山)有限公司 High-frequency surface quenching machine
CN102676785A (en) * 2012-06-08 2012-09-19 荆州环球汽车零部件制造有限公司 Induction hardening process capable of hardening hard-alloy cast iron camshaft

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Application publication date: 20170215