CN108220583A - A kind of preparation method of low defect high speed steel wire rod - Google Patents
A kind of preparation method of low defect high speed steel wire rod Download PDFInfo
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- CN108220583A CN108220583A CN201810014645.9A CN201810014645A CN108220583A CN 108220583 A CN108220583 A CN 108220583A CN 201810014645 A CN201810014645 A CN 201810014645A CN 108220583 A CN108220583 A CN 108220583A
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- wire rod
- speed steel
- high speed
- steel wire
- preparation
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- 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
- C21D1/26—Methods of annealing
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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 Strip Materials And Filament Materials (AREA)
Abstract
The present invention relates to a kind of preparation methods of low defect high speed steel wire rod, can eliminate high speed steel wire rod tissue defects, promote wire rod liver mass and performance.The present invention's is mainly characterized by after high-speed steel is heated to 840~900 DEG C of abundant austenitizings, and to be not less than the cooling velocity of 2 DEG C/min, fast cooling is then furnace-cooled to 500 DEG C or so and comes out of the stove to 730~780 DEG C of range inside holding 30min 6h.The high speed steel wire rod produced using this method has many advantages, such as that tissue defects are few, liver mass is high, has good comprehensive mechanical property.
Description
Technical field
The present invention relates to a kind of preparation methods of low defect high speed steel wire rod, and in particular to a kind of elimination high-speed steel
Wire rod tissue defects, the method for improving its liver mass and comprehensive performance.
Background technology
High-speed steel is widely used in manufacturing various millings because having many advantages, such as high rigidity, high-wearing feature, good red hardness
The efficient delicate machine tools such as knife, gear shaper cutter, lathe tool, fluted drill, bimetal saw blade are the important of modern high end equipment manufacture
Basic material.
Rapid steel tool is manufactured using high-speed steel Bar Wire Product, and preparation flow is：Smelting → refining → casting → electroslag weight
Molten → forging → rolling → cold-drawn/cold rolling → stick/wire rod.Ingredient and tissue characteristic due to high-speed steel, high speed steel wire rod are adding
The tissue defects such as coarse Carbide Precipitation particle, adhesion, fracture, microstructure coarsening are easily generated during work, cause high speed steel wire
Material processing performance and performance deteriorate.
To improve high speed steel wire rod performance, existing process includes：By new special refinery practice, molten steel is improved
Degree of purity；Reduce S, P and other harmful element contents in steel；Optimized by microalloy treatment, thermomechanical treatment process etc., control
Primary carbide distribution and size in steel processed；Using full annealing (full annealed) or intermediate annealing (recrystallization annealing), lead to
Crystal lattice recombination or atomic migration are crossed, eliminates manufacturing deficiency.
Although above-mentioned process improves Structure of High Speed Steel quality and performance in varying degrees, general tool is met
Regular quality requirement, but due to the presence of above-mentioned tissue defects, the performance of high-performance wire rod needed for high-quality tool can not be met
It is required that particularly under the conditions of high deformation quantity or to processing performance is used to require harsh occasion.
Invention content
Technical problem：The object of the present invention is to provide a kind of preparation method of low defect high speed steel wire rod,
The tissue defects of process generation can be eliminated, solve the high speed steel wire rod processing performance of Conventional processing methods production not
The problem of sufficient.
Technical solution：The preparation method of a kind of low defect high speed steel wire rod that the present invention uses, concrete technology packet
Include following steps：
1) austenitizing heats：By high speed steel wire rod in austenitizing temperature more than heating and thermal insulation, abundant austenitizing；
2) it is quickly cooled down：Make high speed steel wire rod fast cooling to set temperature section；
3) isothermal annealing：In set temperature section isothermal annealing, make tissue full and uniformization；
4) it is furnace-cooled to 450-550 DEG C, it is air-cooled.
Wherein,
Austenitizing temperature is 840~900 DEG C in step 1), soaking time 30min-4h.
Being quickly cooled down described in step 2), cooling velocity are not less than 2 DEG C/min.
Set temperature section described in step 2) is 730~780 DEG C；
Isothermal annealing described in step 3), time 30min-6h；
Isothermal temperature range and isothermal time in step 3), with cooling speed in austenitizing temperature, step 2) in step 1)
Degree has correspondence, that is, when improving austenitizing temperature or accelerating cooling velocity, when need to reduce isothermal temperature, extend isothermal
Between.
The present invention is by controlling austenitizing heating temperature, microstructure coarsening caused by avoiding austenitizing heating temperature excessively high
And rod-shaped Carbide Precipitation problem；By controlling cooling velocity, the tissue defects of the improper generation of cooling technique are eliminated；According to Austria
Family name's body temperature and cooling velocity select specific isothermal temperature and time, further control tissue defects in constant temperature process
It generates.Compared with prior art scheme and product, the high speed steel wire rod tissue defects produced using the above method are few, tissue matter
Amount is high, has good processing and performance, meets the quality requirement of high-efficiency and precision machining tool.
Specific embodiment
The present invention is mainly reflected in：Control high speed steel wire rod critical process node, regulation and control austenitizing heating temperature, cooling
The parameters such as speed, isothermal temperature and time reach profile error, eliminate tissue defects, promote the synthesis of high speed steel wire rod
Performance.
The production technology of the present invention is described in detail below in conjunction with specific embodiment.
Embodiment 1：
M42 high speed steel wire rods are handled as follows：
(1) high speed steel wire rod is heated to 840 DEG C of heat preservation 4h, abundant austenitizing；
(2) wire rod is made to be quickly cooled to 770 DEG C with the cooling velocity of 2 DEG C/min；
(3) in 770 DEG C of isothermal 2h, make tissue full and uniformization；
(4) it is furnace-cooled to 500 DEG C, it is air-cooled.
Embodiment 2：
M42 high speed steel wire rods are handled as follows：
(1) high speed steel wire rod is heated to 860 DEG C of heat preservation 3h, abundant austenitizing；
(2) wire rod is made to be quickly cooled to 760 DEG C with the cooling velocity of 4 DEG C/min；
(3) in 760 DEG C of isothermal 2.5h, make tissue full and uniformization；
(4) it is furnace-cooled to 480 DEG C, it is air-cooled.
Embodiment 3：
M42 high speed steel wire rods are handled as follows：
(1) high speed steel wire rod is heated to 870 DEG C of heat preservation 2h, abundant austenitizing；
(2) wire rod is made to be quickly cooled to 755 DEG C with the cooling velocity of 5 DEG C/min；
(3) in 755 DEG C of isothermal 3h, make tissue full and uniformization；
(4) it is furnace-cooled to 550 DEG C, it is air-cooled.
Embodiment 4：
M42 high speed steel wire rods are handled as follows：
(1) high speed steel wire rod is heated to 880 DEG C of heat preservation 2h, abundant austenitizing；
(2) wire rod is made to be quickly cooled to 750 DEG C with the cooling velocity of 8 DEG C/min；
(3) in 750 DEG C of isothermal 4h, make tissue full and uniformization；
(4) it is furnace-cooled to 450 DEG C, it is air-cooled.
Embodiment 5：
M42 high speed steel wire rods are handled as follows：
(1) high speed steel wire rod is heated to 900 DEG C of heat preservation 1h, abundant austenitizing；
(2) wire rod is made to be quickly cooled to 740 DEG C with the cooling velocity of 10 DEG C/min；
(3) in 740 DEG C of isothermal 5h, make tissue full and uniformization；
(4) it is furnace-cooled to 500 DEG C, it is air-cooled.
Embodiment 6：
M42 high speed steel wire rods are handled as follows：
(1) high speed steel wire rod is heated to 860 DEG C of heat preservation 3h, abundant austenitizing；
(2) wire rod is made to be quickly cooled to 760 DEG C with the cooling velocity of 10 DEG C/min；
(3) in 760 DEG C of isothermal 3h, make tissue full and uniformization；
(4) it is furnace-cooled to 550 DEG C, it is air-cooled.
Embodiment 7：
M42 high speed steel wire rods are handled as follows：
(1) high speed steel wire rod is heated to 880 DEG C of heat preservation 2h, abundant austenitizing；
(2) wire rod is made to be quickly cooled to 750 DEG C with the cooling velocity of 12 DEG C/min；
(3) in 750 DEG C of isothermal 5h, make tissue full and uniformization；
(4) it is furnace-cooled to 500 DEG C, it is air-cooled.
Embodiment 8：
M42 high speed steel wire rods are handled as follows：
(1) high speed steel wire rod is heated to 890 DEG C of heat preservation 1.5h, abundant austenitizing；
(2) wire rod is made to be quickly cooled to 745 DEG C with the cooling velocity of 15 DEG C/min；
(3) in 745 DEG C of isothermal 6h, make tissue full and uniformization；
(4) it is furnace-cooled to 480 DEG C, it is air-cooled.
Claims (6)
1. a kind of preparation method of low defect high speed steel wire rod, it is characterised in that this method comprises the following steps：
1) austenitizing heats：By high speed steel wire rod in austenitizing temperature more than heating and thermal insulation, abundant austenitizing；
2) it is quickly cooled down：Make high speed steel wire rod fast cooling to set temperature section；
3) isothermal annealing：In set temperature section isothermal annealing, make tissue full and uniformization；
4) it is furnace-cooled to 450-550 DEG C, it is air-cooled.
2. the preparation method of low defect high speed steel wire rod according to claim 1, which is characterized in that in step 1)
Austenitizing temperature is 840~900 DEG C, soaking time 30min-4h.
3. the preparation method of low defect high speed steel wire rod according to claim 1, which is characterized in that in step 2)
Described is quickly cooled down, and cooling velocity is not less than 2 DEG C/min.
4. the preparation method of low defect high speed steel wire rod according to claim 1, which is characterized in that in step 2)
The set temperature section is 730~780 DEG C.
5. the preparation method of low defect high speed steel wire rod according to claim 1, which is characterized in that in step 3)
The isothermal annealing, time 30min-6h.
6. the preparation method of low defect high speed steel wire rod according to claim 1, which is characterized in that in step 3)
Cooling velocity has correspondence in austenitizing temperature, step (2) in isothermal temperature section and isothermal time, with step (1),
When improving austenitizing temperature or accelerating cooling velocity, isothermal temperature need to be reduced, extend isothermal time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810014645.9A CN108220583A (en) | 2018-01-08 | 2018-01-08 | A kind of preparation method of low defect high speed steel wire rod |
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| CN201810014645.9A CN108220583A (en) | 2018-01-08 | 2018-01-08 | A kind of preparation method of low defect high speed steel wire rod |
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| CN108220583A true CN108220583A (en) | 2018-06-29 |
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| CN201810014645.9A Pending CN108220583A (en) | 2018-01-08 | 2018-01-08 | A kind of preparation method of low defect high speed steel wire rod |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110819781A (en) * | 2019-11-06 | 2020-02-21 | 东南大学 | High-speed steel wire circulation heat treatment method |
Citations (4)
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|---|---|---|---|---|
| CN1854324A (en) * | 2005-04-29 | 2006-11-01 | 宝山钢铁股份有限公司 | Production of high-alloy cold mould steel |
| CN103667731A (en) * | 2013-11-19 | 2014-03-26 | 东南大学 | Production method of high-plasticity high-speed steel |
| CN104388640A (en) * | 2014-12-18 | 2015-03-04 | 无锡伊诺永利文化创意有限公司 | High-speed steel isothermal annealing process |
| CN105714037A (en) * | 2014-12-03 | 2016-06-29 | 重庆业高家具有限公司 | High-speed steel cutter annealing process |
-
2018
- 2018-01-08 CN CN201810014645.9A patent/CN108220583A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1854324A (en) * | 2005-04-29 | 2006-11-01 | 宝山钢铁股份有限公司 | Production of high-alloy cold mould steel |
| CN103667731A (en) * | 2013-11-19 | 2014-03-26 | 东南大学 | Production method of high-plasticity high-speed steel |
| CN105714037A (en) * | 2014-12-03 | 2016-06-29 | 重庆业高家具有限公司 | High-speed steel cutter annealing process |
| CN104388640A (en) * | 2014-12-18 | 2015-03-04 | 无锡伊诺永利文化创意有限公司 | High-speed steel isothermal annealing process |
Non-Patent Citations (2)
| Title |
|---|
| 周雪峰等: "M2高速钢盘条退火工艺的优化", 《机械工程材料》 * |
| 赵步青: "高速钢的退火方法", 《机械工人（热加工）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110819781A (en) * | 2019-11-06 | 2020-02-21 | 东南大学 | High-speed steel wire circulation heat treatment method |
| CN110819781B (en) * | 2019-11-06 | 2021-06-01 | 东南大学 | High-speed steel wire circulation heat treatment method |
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Application publication date: 20180629 |
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