CN107557542B - A kind of final heat treatment method of cutter steel - Google Patents
A kind of final heat treatment method of cutter steel Download PDFInfo
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- CN107557542B CN107557542B CN201710765985.0A CN201710765985A CN107557542B CN 107557542 B CN107557542 B CN 107557542B CN 201710765985 A CN201710765985 A CN 201710765985A CN 107557542 B CN107557542 B CN 107557542B
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- heat treatment
- final heat
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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
- 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 present invention relates to a kind of final heat treatment methods of cutter steel, using reheating water quenching again, the final heat treatment mode being tempered later, segmented heating is especially provided in first heating, cutter is set both to have can achieve higher strong hardness with steel, it can avoid causing cutter distortion or cracking since the cooling velocity of subsequent water quenching is excessively high again.Tempering cooling stage after water quenching, and segmented cooling is used, there is certain help to the abrasion resistance properties for improving finished product.And, cutter of the invention steel use specific starting material element and form and match, content and proportionate relationship to Si, Mn, Cr, Mo, Co have done specific aim adjustment, to ensure that the product after final heat treatment obtains good wear-resisting property and service life.
Description
Technical field
The present invention relates to cutter steel fields, in particular to a kind of final heat treatment method of cutter steel.
Background technique
The quality of cutter steel can not should mainly make only from the point of view of the sharpness of cutter or hardness from it
It integrates to evaluate with steel: this four aspects of strong hardness, corrosion resistance, toughness, machinability.For cutter performance and
Speech, most important manufacturing step are heat treatment, and poor steel may also produce better blade by good heat treatment
Come, poor perhaps very poor heat treatment may make good cutter lose its some inherent characteristics with steel or lead
Hard steel is caused to become fragile.
Heat treatment can improve the microstructure of steel, make to reach required desired physical considerations.Toughness, hardness and wearability are can
With the characteristic obtained by heat treatment.These characteristics are obtained, the operations such as quenching, tempering, the annealing in heat treatment need to be used.
Tool work piece after forging can be such that the indexs such as its hardness, intensity meet after a series of processing, through final heat treatment
It is required that.Especially for use environment required for waste material crusher cutter, due to usually containing sandstone etc. in solid waste
Object causes tool wear very fast, will often change within 2,3 months a knife, and cutter somewhat expensive, while wearing and bringing function again
Consumption increases.Therefore, how by improving Final Heat Treatment Process, make cutter product that there are excellent abrasion resistance properties and use the longevity
Life, is to have technical problem to be solved at present.
Summary of the invention
In order to solve the problems, such as the above-mentioned service performance of waste material crusher cutter steel, the present invention provides a kind of cutter use
The final heat treatment method of steel, this method enable cutter steel to have excellent abrasion resistance properties and service life.
A kind of final heat treatment method of cutter steel, it is characterised in that: the final heat treatment is to be added using induction
The mode of heat carries out the cutter after roughing with steel to be heated to 950~1050 DEG C for the first time, and soaking time is 2.5~3h, empty
It is cooled to room temperature, then reheating is to 800~850 DEG C, keeps the temperature water quenching after 1~2h, and when quenching stirs water, after water quenching again
In secondary loading heating furnace, 1~2h is kept the temperature in 500~600 DEG C of tempering, is then air-cooled to room temperature.
The bending strength of the cutter steel product reaches 2000~2500MPa, and hardness is up to 60~65HRC.
The cutter is formed with steel raw material comprising following element: C:0.60-0.70%, Si:0.50-0.80%, Mn:
0.30-0.50%, Cr:4.50-5.50%, Mo:0.80-1.20%, Co:1.20-1.50%, Al:0.05-0.10%, P < 0.01%, S
< 0.02%, surplus are Fe and inevitable impurity.
The first heating of the final heat treatment is specifically, be packed into induction heater for the steel of the cutter after roughing
In, 400~450 DEG C are at the uniform velocity warming up in 3~5h, soaking time is 0.5~1h, is then continuously heating to 50~80 DEG C/h
950~1050 DEG C, soaking time is 2.5~3h, is air-cooled to room temperature.
Before the final heat treatment step, further include smelted according to chemical component and weight percent and forging blank,
First heat treatment, roughing, the final heat treatment step further include later finishing step.
The first heat treatment is 2.5~3h in 800~850 DEG C of soaking times for blank to be fitted into heat-treatment furnace, it
After cool to room temperature with the furnace.
In the final heat treatment step, it is again loaded into heating furnace after water quenching, 500 are warming up to 30~50 DEG C/h~
600 DEG C of tempering, keep the temperature 1~2h, cool to 200~250 DEG C with the furnace, then come out of the stove and be air-cooled to room temperature.
Cutting test is carried out with steel to cutter of the invention on lathe, being cut material is 45 steel, hardness HB160
~200, cutting speed 20m/min, revolution 1.9r/min, rotary feed 0.3mm, radial feeds 0.024mm are always cut
Cutting depth is a 5.625mm, always cuts long 1.5m, and it is only the prior art that it is 0.05~0.08mm that abrasion loss is measured after cutting
Used in waste material crusher cutter abrasion loss half.
The present invention uses reheating water quenching again, and the final heat treatment mode being tempered later is especially set in first heating
Segmented heating has been set, so that cutter had not only been can achieve higher strong hardness with steel, but also can avoid the cooling due to subsequent water quenching
Speed is excessively high, causes cutter distortion or cracking.Tempering cooling stage after water quenching, and segmented cooling is used, to raising
The abrasion resistance properties of finished product have certain help.Also, cutter of the invention with steel use specific starting material element composition and
Proportion, content and proportionate relationship to Si, Mn, Cr, Mo, Co have done specific aim adjustment, thus after ensure that final heat treatment
Product obtains good wear-resisting property and service life.
Specific embodiment
Below with reference to embodiment and comparative example, the present invention is described in more detail.
Embodiment 1:
A kind of final heat treatment method of cutter steel, the cutter are formed with steel raw material comprising following element: C:
0.60%, Si:0.50%, Mn:0.50%, Cr:5.50%, Mo:0.80%, Co:1.20%, Al:0.10%, P < 0.01%, S <
0.02%, surplus is Fe and inevitable impurity.The final heat treatment is by the way of induction heating, after roughing
Cutter be fitted into induction heater with steel, 450 DEG C, soaking time 1h are at the uniform velocity warming up in 3h, then with 50 DEG C/h
950 DEG C are continuously heating to, soaking time 3h is air-cooled to room temperature, and then reheating keeps the temperature water quenching after 1h, quenching to 850 DEG C
When water is stirred, be again loaded into heating furnace after water quenching, 600 DEG C of tempering be warming up to 50 DEG C/h, keep the temperature 1h, furnace cooling
To 250 DEG C, then comes out of the stove and be air-cooled to room temperature.It further include according to chemical component and weight hundred before the final heat treatment step
Divide than smelting with forging blank, being heat-treated for the first time, roughing, further includes finishing step after the final heat treatment step.
The first heat treatment is 2.5h in 850 DEG C of soaking times, cools to room with the furnace later for blank to be fitted into heat-treatment furnace
Temperature.The bending strength of the cutter steel product reaches 2500MPa, and hardness reaches 60HRC.
Embodiment 2:
A kind of final heat treatment method of cutter steel, the cutter are formed with steel raw material comprising following element: C:
0.65%, Si:0.60%, Mn:0.40%, Cr:4.50%, Mo:0.90%, Co:1.30%, Al:0.08%, P < 0.01%, S <
0.02%, surplus is Fe and inevitable impurity.The final heat treatment is by the way of induction heating, after roughing
Cutter be fitted into induction heater with steel, 420 DEG C are at the uniform velocity warming up in 35h, soaking time 0.5h, then with 60
DEG C/h is continuously heating to 1000 DEG C, soaking time 2.5h is air-cooled to room temperature, and then reheating keeps the temperature water after 1h to 820 DEG C
It quenches, when quenching, stirs water, is again loaded into heating furnace after water quenching, and 550 DEG C of tempering are warming up to 40 DEG C/h, keep the temperature 2h,
It cools to 220 DEG C with the furnace, then comes out of the stove and be air-cooled to room temperature.It further include according to chemical component before the final heat treatment step
And weight percent is smelted and forging blank, first heat treatment, roughing, further includes finishing after the final heat treatment step
Work step is rapid.The first heat treatment is 2.5h in 830 DEG C of soaking times for blank to be fitted into heat-treatment furnace, cold with furnace later
But to room temperature.The bending strength of the cutter steel product reaches 2200MPa, and hardness reaches 65HRC.
Embodiment 3:
A kind of final heat treatment method of cutter steel, the cutter are formed with steel raw material comprising following element: C:
0.70%, Si:0.80%, Mn:0.30%, Cr:4.50%, Mo:1.20%, Co:1.50%, Al:0.10%, P < 0.01%, S <
0.02%, surplus is Fe and inevitable impurity.The final heat treatment is by the way of induction heating, after roughing
Cutter be fitted into induction heater with steel, 450 DEG C, soaking time 1h are at the uniform velocity warming up in 4h, then with 80 DEG C/h
1050 DEG C are continuously heating to, soaking time 3h is air-cooled to room temperature, and then reheating keeps the temperature water quenching after 2h, quench to 850 DEG C
Water is stirred when fiery, is again loaded into heating furnace after water quenching, 600 DEG C of tempering are warming up to 50 DEG C/h, keeps the temperature 2h, it is cold with furnace
But it to 250 DEG C, then comes out of the stove and is air-cooled to room temperature.It further include according to chemical component and weight before the final heat treatment step
Percentage is smelted and forging blank, first heat treatment, roughing, further includes finishing work step after the final heat treatment step
Suddenly.The first heat treatment is 3h in 850 DEG C of soaking times, cools to room with the furnace later for blank to be fitted into heat-treatment furnace
Temperature.The bending strength of the cutter steel product reaches 2500MPa, and hardness reaches 65HRC.
Comparative example 1:
By the cutter steel with same elemental composition of the invention and content, without final heat treatment, or at final heat
The heating method and step of reason change, then the bending strength of obtained waste material crusher cutter is significantly lower than 1800MPa,
And after cutting test same as the present application, wear-resisting property is suitable with prior art products.
Comparative example 2:
The cutter steel raw material that will differ from elemental composition and content of the present invention, using final heat same as the present application
After treatment process preparation, the strong hardness of obtained waste material crusher cutter is difficult to meet the requirements, also, can also be with even if hardness
Reach 58HRC, and after cutting test same as the present application, wear-resisting property is suitable with prior art products.
The elemental composition choosing of waste material crusher cutter steel of the present invention it can be seen from embodiment 1-3 and comparative example 1-2
Select with final heat treatment step process, be applicant verifies by repeated tests.By reheating water quenching again, it
The final heat treatment mode being tempered afterwards, in particular, making cutter steel reach ideal strong in heating segmented heating for the first time
Hardness.Tempering uses segmented cooling after water quenching, and the wear-resisting property of cutter finished product is made also to have reached desirable level.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (5)
1. a kind of final heat treatment method of cutter steel, it is characterised in that: the final heat treatment is using induction heating
Mode, the cutter after roughing is carried out to be heated to 950~1050 DEG C for the first time with steel, soaking time is 2.5~3h, air-cooled
To room temperature, then reheating is to 800~850 DEG C, keeps the temperature water quenching after 1~2h, and when quenching stirs water, after water quenching again
It is fitted into heating furnace, keeps the temperature 1~2h in 500~600 DEG C of tempering, be then air-cooled to room temperature；
The first heating of the final heat treatment is specifically, the cutter steel after roughing are fitted into induction heater, 3
At the uniform velocity it is warming up to 400~450 DEG C in~5h, soaking time is 0.5~1h, then 950 are continuously heating to 50~80 DEG C/h~
1050 DEG C, soaking time is 2.5~3h, is air-cooled to room temperature；
The bending strength of the cutter steel product reaches 2000~2500MPa, and hardness is up to 60~65HRC.
2. final heat treatment method according to claim 1, it is characterised in that: cutter steel raw material includes following
Element composition: C:0.60-0.70%, Si:0.50-0.80%, Mn:0.30-0.50%, Cr:4.50-5.50%, Mo:0.80-
1.20%, Co:1.20-1.50%, Al:0.05-0.10%, P < 0.01%, S < 0.02%, surplus be Fe and inevitably it is miscellaneous
Matter.
3. final heat treatment method according to claim 1, it is characterised in that: before the final heat treatment step, also
Including being smelted and forging blank, first heat treatment, roughing, the final heat treatment step according to chemical component and weight percent
It further include finishing step after rapid.
4. final heat treatment method according to claim 3, it is characterised in that: the first heat treatment is to be packed into blank
In heat-treatment furnace, it is 2.5~3h in 800~850 DEG C of soaking times, cools to room temperature with the furnace later.
5. final heat treatment method according to any one of claims 1 to 3, it is characterised in that: the final heat treatment step
It in rapid, is again loaded into heating furnace after water quenching, 500 ~ 600 DEG C of tempering is warming up to 30 ~ 50 DEG C/h, keep the temperature 1 ~ 2h, furnace cooling
To 200 ~ 250 DEG C, then comes out of the stove and be air-cooled to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710765985.0A CN107557542B (en) | 2017-08-30 | 2017-08-30 | A kind of final heat treatment method of cutter steel |
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| CN201710765985.0A CN107557542B (en) | 2017-08-30 | 2017-08-30 | A kind of final heat treatment method of cutter steel |
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| CN107557542B true CN107557542B (en) | 2019-03-12 |
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| CN1262156A (en) * | 2000-03-13 | 2000-08-09 | 张云寿 | Disk-type shear knife and its heat treating technology |
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| CN1693527A (en) * | 2005-05-10 | 2005-11-09 | 酒泉钢铁(集团)有限责任公司 | Cobalt less multi element high speed tool steel and its manufacturing method |
| CN101144140A (en) * | 2006-09-15 | 2008-03-19 | 宝山钢铁股份有限公司 | Flying shear blade and preparation method thereof |
| CN101177765A (en) * | 2006-11-10 | 2008-05-14 | 宝山钢铁股份有限公司 | Disk shearing blade and method for manufacturing the same |
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| CN103789688A (en) * | 2012-11-03 | 2014-05-14 | 锡山区鹅湖慧盾机械厂 | Heat treatment method of cold work die steel used for blanking die |
| CN104400037A (en) * | 2014-12-19 | 2015-03-11 | 苏州路路顺机电设备有限公司 | Durable cutter and manufacturing method thereof |
| CN106367579A (en) * | 2016-08-30 | 2017-02-01 | 江苏扬碟钻石工具有限公司 | Quenching technology of sheet milling cutter |
-
2017
- 2017-08-30 CN CN201710765985.0A patent/CN107557542B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1262156A (en) * | 2000-03-13 | 2000-08-09 | 张云寿 | Disk-type shear knife and its heat treating technology |
| CN1351188A (en) * | 2000-10-30 | 2002-05-29 | 安徽省当涂冶金机械备件厂 | Steel dedicated for tool blade and technology for manufacturing tool blade |
| CN1693527A (en) * | 2005-05-10 | 2005-11-09 | 酒泉钢铁(集团)有限责任公司 | Cobalt less multi element high speed tool steel and its manufacturing method |
| CN101144140A (en) * | 2006-09-15 | 2008-03-19 | 宝山钢铁股份有限公司 | Flying shear blade and preparation method thereof |
| CN101177765A (en) * | 2006-11-10 | 2008-05-14 | 宝山钢铁股份有限公司 | Disk shearing blade and method for manufacturing the same |
| JP2008248334A (en) * | 2007-03-30 | 2008-10-16 | Sumitomo Metal Ind Ltd | Method for manufacturing martensitic stainless steel tube |
| CN102796860A (en) * | 2012-09-12 | 2012-11-28 | 沈阳飞机工业（集团）有限公司 | Technique for thermal-treatment processing of high speed steel tools |
| CN103789688A (en) * | 2012-11-03 | 2014-05-14 | 锡山区鹅湖慧盾机械厂 | Heat treatment method of cold work die steel used for blanking die |
| CN104400037A (en) * | 2014-12-19 | 2015-03-11 | 苏州路路顺机电设备有限公司 | Durable cutter and manufacturing method thereof |
| CN106367579A (en) * | 2016-08-30 | 2017-02-01 | 江苏扬碟钻石工具有限公司 | Quenching technology of sheet milling cutter |
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| CN107557542A (en) | 2018-01-09 |
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Effective date of registration: 20190202 Address after: 266000 Zhao Hong Road South, Zhao Gezhuang Community, Liuting Street, Chengyang District, Qingdao City, Shandong Province Applicant after: Qingdao Yurui Heat Treatment Co., Ltd. Address before: 518101 23 Xin'an Lake Garden, Xin'an Street, Baoan District, Shenzhen City, Guangdong Province 203 Applicant before: Shenzhen Wanjia Interactive Technology Co., Ltd. |
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