CN108893578A - A kind of double tissue process for quenching of steel alloy - Google Patents
A kind of double tissue process for quenching of steel alloy Download PDFInfo
- Publication number
- CN108893578A CN108893578A CN201810616605.1A CN201810616605A CN108893578A CN 108893578 A CN108893578 A CN 108893578A CN 201810616605 A CN201810616605 A CN 201810616605A CN 108893578 A CN108893578 A CN 108893578A
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- Prior art keywords
- quenching
- wing plate
- cooling
- workpiece
- liquid
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING 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
- C21D6/00—Heat treatment of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING 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
- C21D2221/00—Treating localised areas of an article
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a kind of process for quenching of the double tissue workpiece of steel alloy.Wing plate is arranged in the junction at non-quenching position and quenching position in advance in the process for quenching, when workpiece quenching heats, non-quenching position is wrapped up with insulating layer, when workpiece quenching is cooling, wing plate is placed on bracket, the quenching liquid Cooling Quenching position of flowing, quenching liquid liquid level is not less than the lower surface of wing plate, and when necessary, non-quenching position uses induction coil induction heating, after lonneal, wing plate is cut off by the way of cold working.Non-quenching position of the present invention slow cooling can get Annealed microstructure, it is cooling using quenching liquid to quench position, obtains quenching state tissue, wing plate reduces non-quenching position and quenches influencing each other for position cooling velocity, the quenching position that workpiece can also be fixed simultaneously, guarantees the quenching quality and production efficiency of workpiece.
Description
Technical field
Present invention application steel Field of Heat-treatment, and in particular to a kind of process for quenching may make monometallic alloyed steel work-piece
Double tissues are obtained, the requirement of workpiece different parts different hardness is met.
Background technique
Grinder hammerhead is a kind of representative workpiece of different parts different hardness requirement, and tup is that one kind on crusher is easy
Consumption product need the unification of wearability and impact flexibility.Potassium steel material is mostly used, since potassium steel is under the conditions of impact, workpiece
The austenite on surface can be changed into martensite, to be hardened, have certain Impact wear resistance.But in small impact force
Operating condition under, austenite change martensite it is less, the hardening of potassium steel is limited, and abrasion-resistance, which is unable to reach, to be given full play to.Afterwards
Rich chromium cast iron wear-resistant material is developed, although rich chromium cast iron has good friction wear resistence, it is due to brittle carbides
Content is more, and fractions distribution is very poor, causes its impact flexibility very low, and even across Metamorphism treatment, impact flexibility is also no more than
10J is unable to satisfy the wear-resistant demand of impact operating condition.Present cracking hammer head mostly uses compound through liquid liquid by rich chromium cast iron and steel alloy
Or solid-liquid is combined composite hammer head.
Double-metal composite hammer causes composition tolerances to be unable to satisfy performance requirement and reduce since the compound superfusion of liquid liquid is serious
Service life, solid-liquid is compound due to equally service life being caused to reduce without binding force between bimetallic, is unable to reach ideal shape
State, or it is unable to satisfy the requirement of service life.Monometallic tup can not be obtained hard inside and outside two by conventional heat treatment process
Uniform product is spent, under normal circumstances, the hardness on tup surface is improved by surface hardening or diffusing alloying during casting, but using
Cheng Zhong, once the rigidity layer is worn away, tup will be unable to meet wear resistence requirement, and the subsequent use service life will drastically reduce.This
Invention is intended to using a kind of steel alloy monometallic meet by the control of different parts cooling velocity to obtain different tissues
Unused hardness requirement, and inside and outside difference in hardness is little, can satisfy the service life requirement of tup.
Publication No. is the patent of invention of CN105506485A《A kind of double hardness tups of low-alloy medium carbon steel and its heat treatment side
Method》A kind of heat treatment method is given, i.e. tup only carries out oil quenching cooling, flexible or plasticity in the workspace for having hardness requirement
It is required that axis hole area do not quench, so that the tissue for obtaining double hardness gives the ruler of oil level line to obtain satisfied effect
It is very little.The invention is there are two defects, first is that high temperature workpiece oil quenching must be wholly embedded into the liquid level of quenching oil hereinafter, otherwise quenching oil
It is easy kindling, causes safety accident.Second is that axis hole area is equivalent to normalizing cooling, for certain tups, it is unable to satisfy user
Soft requirement.
The application for a patent for invention of Publication No. CN101514504A《A kind of high-precision double-hardness cotton spinning ring and its preparation
Method and apparatus》Double hardness are obtained using local induction heating quenching, this method is suitable for the thin workpiece of wall, for heavy wall work
For part, can only surface induction heating, surface hardening, inside and outside hardness is inconsistent.
Summary of the invention
Technical problem solved by the invention is：A kind of process for quenching of double tissues of steel alloy acquisition are provided, so that quenching
Site tissue is high rigidity quenching structure, and non-quenching position is Annealed microstructure.
The technical scheme adopted by the invention is that：
Before quenching, wing plate is set in the junction at non-quenching position and quenching position；When workpiece quenching heats, by non-quenching position
It is wrapped up with insulating layer, is put into heating in furnace, insulating layer is using refractory cotton, refractory fibre or fire clay production；Workpiece quenching is cooling
When, wing plate is placed on bracket, the quenching liquid Cooling Quenching position of flowing, and quenching liquid liquid level is not less than the lower surface of wing plate.
Further, in the quenching Step, container can be used and be placed on the closed covering in non-quenching position on wing plate.
When to prevent workpiece quenching, non-quenching position is quickly cooled down, and the non-quenching position uses induction coil induction heating.
The wing plate is process using casting or the thermal processing methods such as welding or forging, after being heat-treated lonneal,
Wing plate is cut off by the way of cold working.
The beneficial effects of the invention are as follows：
Method non-quenching position of the invention uses insulating layer slow cooling, and auxiliary induction heats when necessary, can get Annealed microstructure,
It is cooling using quenching liquid to quench position, obtains quenching state tissue, wing plate reduces non-quenching position and quenches position cooling velocity
It influences each other, to obtain double workpiece for organizing double hardness, while wing plate can fix the quenching position of workpiece, guarantee workpiece
Quench quality and production efficiency.
Detailed description of the invention
Fig. 1 is that embodiment 1 quenches schematic diagram；
Fig. 2 is that embodiment 2 quenches schematic diagram；
Wherein：1- hammer handle, 2- hammer tip, 3- wing plate, 4- bracket, 5- quenching liquid, 6- insulating layer, 7- induction coil, 8- non-quenching position,
9- quenches position.
Specific embodiment
Embodiment 1.
1 product of the present embodiment is cracking hammer head, and weight 80kg, non-quenching position is hammer handle, and quenching position is hammer tip.It is broken
When in use, hammer handle 1 is coupling part to broken tup, it is desirable that plasticity is good, hardness requirement HRC20-25.Hammer tip 2 is working portion,
It is required that wear-resistant, hardness requirement is not less than HRC58, and inside and outside difference of hardness is not more than 2HRC.According to the requirement of these hardness numbers, choosing
It is the material of tup, such as 50CrMnMo, 55 CrMnMo with medium carbon alloy steel, as long as the quenching hardness of these alloy steel materials
Not less than HRC58, annealing hardness is HRC20-25.
Attached drawing 1 is that 1 tup of the present embodiment quenches schematic diagram.Cracking hammer head is needed in casting by the same cracking hammer head of wing plate 3
It casts out and together, the position of wing plate 3 is located at the junction of hammer handle 1 and hammer tip 2.The tup of casting and forming by cleaning polishing and
Heat treatment in advance process can carry out quenching and low-temperature tempering heat treatment.Heat treatment in advance mostly uses annealing or normalizing, with refinement
The as-cast grain and homogenization of composition of medium carbon alloy steel carry out tissue preparation for subsequent quenching heat treatment.
When Quench heating, by the hammer handle 1 on 3 top of wing plate refractory cotton or refractory fibre package, can also use it is inexpensive
Fire clay package, forms insulating layer 6, is put into furnace and requires to be heated according to heat treatment process, keep the temperature, and reaches technique requirement
It after temperature and time, takes out, is placed on rapidly on the bracket 4 of cooling bay out of furnace, open simultaneously 5 imported valve of quenching liquid, make
Upper surface of the liquid level of the quenching liquid 5 of flowing beyond wing plate 3 is a little, and the flow velocity of quenching liquid does not generate bubble chamber film with hammer tip surface and is
Most preferably.Quenching liquid is water solubility, can change the quenching cooling velocity of quenching liquid by modulating the ratio of water.
Such quenching mode can get following benefit：1）The hammer tip 2 of lower part can be made to be quickly cooled down, the quenching of flowing
Liquid surrounds entire hammer tip, and the available rapid cooling of hammer tip obtains satisfied quenching effect.2）It can be adopted with slow cooling hammer handle, hammer handle
It is wrapped up with insulating layer, the heat of the inside can not directly radiate outward, play slow cooling effect.3）Wing plate plays the cooling effect of protection hammer tip
The effect of fruit.The heat of hammer handle can only radiate by the way that the hammer tip of lower end is cooling, devise wing plate in the junction of hammer handle and hammer tip
3, effect is exactly that the major part of hammer handle transmission heat is scattered and disappeared by wing plate, prevents the heat transmission of hammer handle to the cooling speed of hammer tip
The adverse effect of degree guarantees the quenching cooling effect of hammer tip.4）The heat loss through radiation of hammer handle can be slowed down.Wing plate is embedded to quenching liquid liquid
Face is a little, and the cooling of wing plate necessarily leads to vapor, and the floating of vapor surrounds hammer handle, reduces the radiation of hammer handle insulating layer and dissipates
Heat plays insulation effect, is placed on wing plate according to other containers by the closed covering of hammer handle, then heat insulation effect is more preferable.5）The wing
The effect of fixed hammer quenching position when plate also acts as quenching, to facilitate operation guaranteeing quenching quality, improving production efficiency.
When wing plate does not generate vapor, tup is taken out rapidly from cooling pond, is put into tempering furnace and carries out low temperature
Tempering.After tempering, the tissue of tup hammer tip is tempered martensite, and hardness exists in HRC58 or more, inside and outside difference of hardness
The tissue of 1HRC or so, hammer handle coupling part are annealed state ferrite and pearlite, and hardness is in HRC25 hereinafter, fully meeting visitor
The requirement at family.
Final tup product needs the method excision for cutting wing plate using cold cut, avoids hot-working to the shadow of tissue or hardness
It rings, such as uses Water Cutting, emery wheel cuts, wire cutting or machining mode, then reconditioning, to obtain satisfied surface quality.
Embodiment 2.
The hammer handle and hammer tip weight of 1 cracking hammer head of embodiment are not much different, i.e. quenching position and non-quenching position weight, body
Product is roughly the same, radiates relatively slow after hammer handle heat preservation, can obtain Annealed microstructure.The workpiece quenching position weight of embodiment 2 is big
Many in non-quenching position, since its non-quenching position accumulation of heat heat is few, cooling velocity is relatively fast, according to quenching for embodiment 1
Ignition method is unable to reach the requirement of Annealed microstructure, therefore uses the process for quenching of attached drawing 2.
The process for quenching of attached drawing 2 is to increase induction heating apparatus on the basis of attached drawing 1, and induction coil 7 is inserted in non-quenching
Position 8, when quenching the cooling of position 9,8 induction heating of non-quenching position reduces non-quenching position to compensate partial heat
8 cooling velocity, to obtain annealed structure.
Wing plate 3 is located at non-quenching position 8 and quenches the junction at position 9, and to be convenient to clean, setting is quenched section is biggish
The top surface at fiery position 9.Wing plate 3 can be process using casting or the hot worked mode such as forging or welding.The present embodiment 2
8 weight of non-quenching position is small, and accumulation of heat heat is few, and in quenching, the liquid level of quenching liquid 5 is concordant with 3 upper surface of wing plate or is located at
Between the upper and lower surface of wing plate 3, to reduce the cooling velocity of hammer handle, at this point, wing plate 3 helps to increase the cooling at quenching position 9.
In cooling procedure, measuring quenching 9 top surface of position using infrared temperature-measuring gun does not have the surface temperature of quenching liquid, when its temperature reaches
It when low tempering temperatures, can be taken out from cooling bay, be put into progress lonneal processing in tempering furnace.After tempering, the wing
The method excision that plate 3 is equally cut using cold cut.
Non-quenching position of the present invention uses insulating layer slow cooling, and auxiliary induction heats when necessary, can get Annealed microstructure, quenches
Fiery position is cooling using quenching liquid, obtains quenching state tissue, and wing plate can reduce quenching position and non-quenching position cooling velocity
It influences each other, to obtain double products for organizing double hardness, while wing plate can fix quenching position, guarantee quenching quality and life
Produce efficiency.
Claims (5)
1. a kind of double tissue process for quenching of steel alloy, it is characterised in that：At non-quenching position（8）With quenching position（9）Handover
Place's setting wing plate（3）；When workpiece quenching heats, by non-quenching position（8）Use insulating layer（6）Package；When workpiece quenching is cooling, the wing
Plate（3）Place bracket（4）On, the quenching liquid of flowing（5）Cooling Quenching position（9）, quenching liquid（5）Liquid level is not less than wing plate（3）
Lower surface.
2. the double tissue process for quenching of steel alloy according to claim 1, it is characterised in that：In the quenching Step, can adopt
Wing plate is placed on container（3）On by non-quenching position（8）Closed covering.
3. the double tissue process for quenching of steel alloy according to claim 1, it is characterised in that：It is described non-to quench when workpiece quenching
Fiery position（8）Using induction coil（7）Induction heating.
4. the double tissue process for quenching of steel alloy according to claim 1 or 2, it is characterised in that：The wing plate（3）Using casting
It makes or welds or forge thermal processing method and be process, cut off by the way of cold working after heat treatment.
5. the double tissue process for quenching of steel alloy according to claim 1, it is characterised in that：The insulating layer（6）Using resistance to
Guncotton, refractory fibre or fire clay production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810616605.1A CN108893578B (en) | 2018-06-15 | 2018-06-15 | Alloy steel double-structure quenching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810616605.1A CN108893578B (en) | 2018-06-15 | 2018-06-15 | Alloy steel double-structure quenching method |
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| Publication Number | Publication Date |
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| CN108893578A true CN108893578A (en) | 2018-11-27 |
| CN108893578B CN108893578B (en) | 2020-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810616605.1A Active CN108893578B (en) | 2018-06-15 | 2018-06-15 | Alloy steel double-structure quenching method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111778382A (en) * | 2020-08-03 | 2020-10-16 | 江苏大学 | Heat treatment process and tool for shield machine cutter ring |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58120728A (en) * | 1982-01-13 | 1983-07-18 | Uozumi Kogyo Kk | Manufacture of hammer with nail-puller |
| CN1676652A (en) * | 2005-04-01 | 2005-10-05 | 攀枝花市白云铸造有限责任公司 | Wear-resistant hammer head and its manufacturing process |
| CN203307378U (en) * | 2013-05-09 | 2013-11-27 | 中国科学院金属研究所 | Special device for carrying out two-stage quenching heat treatment technology on crusher composite hammer head |
| CN103801429A (en) * | 2014-02-19 | 2014-05-21 | 河北科技大学 | Ultra-hard wear-resistance composite hammerhead for hammer crusher and production method thereof |
| CN104087742A (en) * | 2014-06-24 | 2014-10-08 | 河北钢铁股份有限公司唐山分公司 | Differential temperature heat treatment method for centrifugal compound high-chromium steel roller |
| CN205676509U (en) * | 2016-06-21 | 2016-11-09 | 洛阳市钢峰工程机械制造有限公司 | A kind of device for carrying out selective hardening to workpiece |
-
2018
- 2018-06-15 CN CN201810616605.1A patent/CN108893578B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58120728A (en) * | 1982-01-13 | 1983-07-18 | Uozumi Kogyo Kk | Manufacture of hammer with nail-puller |
| CN1676652A (en) * | 2005-04-01 | 2005-10-05 | 攀枝花市白云铸造有限责任公司 | Wear-resistant hammer head and its manufacturing process |
| CN203307378U (en) * | 2013-05-09 | 2013-11-27 | 中国科学院金属研究所 | Special device for carrying out two-stage quenching heat treatment technology on crusher composite hammer head |
| CN103801429A (en) * | 2014-02-19 | 2014-05-21 | 河北科技大学 | Ultra-hard wear-resistance composite hammerhead for hammer crusher and production method thereof |
| CN104087742A (en) * | 2014-06-24 | 2014-10-08 | 河北钢铁股份有限公司唐山分公司 | Differential temperature heat treatment method for centrifugal compound high-chromium steel roller |
| CN205676509U (en) * | 2016-06-21 | 2016-11-09 | 洛阳市钢峰工程机械制造有限公司 | A kind of device for carrying out selective hardening to workpiece |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111778382A (en) * | 2020-08-03 | 2020-10-16 | 江苏大学 | Heat treatment process and tool for shield machine cutter ring |
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