CN105648177A - Tool steel heat treatment process - Google Patents

Tool steel heat treatment process Download PDF

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Publication number
CN105648177A
CN105648177A CN201410672075.4A CN201410672075A CN105648177A CN 105648177 A CN105648177 A CN 105648177A CN 201410672075 A CN201410672075 A CN 201410672075A CN 105648177 A CN105648177 A CN 105648177A
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CN
China
Prior art keywords
temperature
cold
insulation
time
preheating
Prior art date
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Pending
Application number
CN201410672075.4A
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Chinese (zh)
Inventor
钟传梅
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Chongqing Guikun Machinery Co Ltd
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Chongqing Guikun Machinery Co Ltd
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Application filed by Chongqing Guikun Machinery Co Ltd filed Critical Chongqing Guikun Machinery Co Ltd
Priority to CN201410672075.4A priority Critical patent/CN105648177A/en
Publication of CN105648177A publication Critical patent/CN105648177A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a tool steel heat treatment process; and a material is W18Cr4V. The process is characterized by comprising the steps of: (1) forging treatment; (2) spheroidizing annealing treatment; (3) thermal refining; (4) quenching treatment; and (5) tempering treatment: the tempering temperature is 150-180 DEG C, and the time is 3-4 hours. The tool steel heat treatment process can improve the toughness of tool steel to prevent fracture failure of the tool steel too early through specifying all step requirements, parameter conditions and notes.

Description

A kind of tool steel heat treatment technique
Technical field
The invention belongs to thermal treatment process field, specifically a kind of tool steel heat treatment technique.
Background technology
W18Cr4V is a kind of tool steel of tungsten system rapid steel, has high hardness, red hardness and hot hardness. The quenching of its thermal treatment a wider range is not easily overheated, and heat treatment process is oxidation and decarbonization not easily, and ground finish performance is better. This steel hardness when 500 DEG C and 600 DEG C remains on HRC57��58 and HRC52��53 respectively, has good cutting ability for a large amount of, general machined material. But it is big that the remarkable shortcoming of this steel is fragility, usually causes the early failure of zero. Therefore, how to improve its obdurability, prevent its premature failure to lose efficacy, be that this steel user often runs into and needs the problem of solution. Part failure analysis shows, the impact of thermal treatment factor is maximum, accounts for 50%. Existing thermal treatment process pre-treatment is annealing, temperature is 870-880 DEG C, it is incubated 2-3 hour, then the preheating of 800-840 DEG C of degree, spends marquenching from 1270-280 DEG C, hierarchical temperature is 580-620 DEG C, and then 560 DEG C carry out three tempering, it is incubated 1 hour during tempering, in view of the defect that existing technique is deposited, in order to guarantee product quality, it is necessary to be further improved.
Summary of the invention
In view of the deficiency that prior art exists, it is an object of the invention to provide a kind of tool steel heat treatment technique, its obdurability can be improved, prevent mould premature failure to lose efficacy.
A kind of tool steel heat treatment technique, material is W18Cr4V, it is characterised in that, this processing method comprises the following steps: (1) forges process: preheating temperature 750 DEG C��850 DEG C, Heating temperature 1100 DEG C��1200 DEG C, initial forging temperature 1000 DEG C��1200 DEG C, final forging temperature 900 DEG C��950 DEG C, slow cooling; When forging, pier slightly pulls out to grow and is no less than 4 times repeatedly; Forge in process, tip-tap during temperature > 1100 DEG C; Beat again during temperature 1000��1100 DEG C; Tip-tap during temperature < 1000 DEG C; (2) Spheroidizing Annealing process: heating is also warming up to 950 DEG C with the speed of��90 DEG C/h, with 30-60 DEG C/h speed to stove cold 850 DEG C, then stove is cold with 30-50 DEG C/h speed to stove cold 450 DEG C, then it is empty cold to come out of the stove; (3) modifier treatment: first time preheating 550-600 DEG C, insulation 45-60min; Second time preheating 800-850 DEG C, insulation 45-60min, soaking time presses 1.5min/mm; Reheat 1120 DEG C, oil of then quenching; Tempering temperature 760 DEG C, empty cold after tempering; (4) quench treatment: first time preheating 600��650 DEG C, intensification 30-40 minute, insulation 1-2h, second time preheating: 850��900 DEG C, intensification 50-60 minute, insulation 1-2h, third time preheating 1100��12000 DEG C, intensification 60-90 minute, insulation 1-2h;Quenching temperature 980 DEG C, oil is cold, medium temperature 10��15 DEG C; It is cooled to oil temperature empty cold subsequently; (5) temper: tempering temperature 150-180 DEG C, time 3-4h.
A kind of tool steel heat treatment technique of the present invention, by each step requirement of specification, parameter condition and precaution, can improve its obdurability, prevent tool steel premature failure to lose efficacy.
Embodiment
Below in conjunction with embodiment, the invention will be further described, and its operation steps is as follows:
A kind of tool steel heat treatment technique, material is W18Cr4V, and this processing method comprises the following steps: (1) forges process: preheating temperature 750 DEG C��850 DEG C, Heating temperature 1100 DEG C��1200 DEG C, initial forging temperature 1000 DEG C��1200 DEG C, final forging temperature 900 DEG C��950 DEG C, slow cooling; When forging, pier slightly pulls out to grow and is no less than 4 times repeatedly; Forge in process, tip-tap during temperature > 1100 DEG C; Beat again during temperature 1000��1100 DEG C; Tip-tap during temperature < 1000 DEG C; (2) Spheroidizing Annealing process: heating is also warming up to 950 DEG C with the speed of��90 DEG C/h, with 30-60 DEG C/h speed to stove cold 850 DEG C, then stove is cold with 30-50 DEG C/h speed to stove cold 450 DEG C, then it is empty cold to come out of the stove; (3) modifier treatment: first time preheating 550-600 DEG C, insulation 45-60min; Second time preheating 800-850 DEG C, insulation 45-60min, soaking time presses 1.5min/mm; Reheat 1120 DEG C, oil of then quenching; Tempering temperature 760 DEG C, empty cold after tempering; (4) quench treatment: first time preheating 600��650 DEG C, intensification 30-40 minute, insulation 1-2h, second time preheating: 850��900 DEG C, intensification 50-60 minute, insulation 1-2h, third time preheating 1100��12000 DEG C, intensification 60-90 minute, insulation 1-2h; Quenching temperature 980 DEG C, oil is cold, medium temperature 10��15 DEG C; It is cooled to oil temperature empty cold subsequently; (5) temper: tempering temperature 150-180 DEG C, time 3-4h.
Below the preferred embodiment of the present invention is described in detail. It is to be understood that the those of ordinary skill of this area just can make many modifications and variations according to the design of the present invention without the need to creative work. Therefore, the technical scheme that all technician in the art can be obtained by logic minute analysis, reasoning or limited experiment under this invention's idea on the basis of existing technology, all by the determined protection domain of claim book.

Claims (1)

1. a tool steel heat treatment technique, material is W18Cr4V, it is characterized in that, this processing method comprises the following steps: (1) forges process: preheating temperature 750 DEG C��850 DEG C, Heating temperature 1100 DEG C��1200 DEG C, initial forging temperature 1000 DEG C��1200 DEG C, final forging temperature 900 DEG C��950 DEG C, slow cooling; When forging, pier slightly pulls out to grow and is no less than 4 times repeatedly; Forge in process, tip-tap during temperature > 1100 DEG C; Beat again during temperature 1000��1100 DEG C; Tip-tap during temperature < 1000 DEG C; (2) Spheroidizing Annealing process: heating is also warming up to 950 DEG C with the speed of��90 DEG C/h, with 30-60 DEG C/h speed to stove cold 850 DEG C, then stove is cold with 30-50 DEG C/h speed to stove cold 450 DEG C, then it is empty cold to come out of the stove; (3) modifier treatment: first time preheating 550-600 DEG C, insulation 45-60min; Second time preheating 800-850 DEG C, insulation 45-60min, soaking time presses 1.5min/mm; Reheat 1120 DEG C, oil of then quenching; Tempering temperature 760 DEG C, empty cold after tempering; (4) quench treatment: first time preheating 600��650 DEG C, intensification 30-40 minute, insulation 1-2h, second time preheating: 850��900 DEG C, intensification 50-60 minute, insulation 1-2h, third time preheating 1100��12000 DEG C, intensification 60-90 minute, insulation 1-2h;Quenching temperature 980 DEG C, oil is cold, medium temperature 10��15 DEG C; It is cooled to oil temperature empty cold subsequently; (5) temper: tempering temperature 150-180 DEG C, time 3-4h.
CN201410672075.4A 2014-11-22 2014-11-22 Tool steel heat treatment process Pending CN105648177A (en)

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Application Number Priority Date Filing Date Title
CN201410672075.4A CN105648177A (en) 2014-11-22 2014-11-22 Tool steel heat treatment process

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CN105648177A true CN105648177A (en) 2016-06-08

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105970149A (en) * 2016-07-20 2016-09-28 西安理工大学 Low-carbon high-tungsten alloy steel and preparation method of low-carbon high-tungsten alloy steel body
CN106040744A (en) * 2016-07-20 2016-10-26 西安理工大学 Hot-rolling work roll with micron-grade tungsten carbide enhancement layers and manufacturing method thereof
CN106180241A (en) * 2016-07-20 2016-12-07 西安理工大学 A kind of high-speed steel Cold Extrusion Punch with micron order tungsten carbide enhancement layer and preparation method thereof
CN108406084A (en) * 2018-02-08 2018-08-17 西安建筑科技大学 A kind of stirring-head, friction stir weld device and the method for processing magnalium different alloys

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105970149A (en) * 2016-07-20 2016-09-28 西安理工大学 Low-carbon high-tungsten alloy steel and preparation method of low-carbon high-tungsten alloy steel body
CN106040744A (en) * 2016-07-20 2016-10-26 西安理工大学 Hot-rolling work roll with micron-grade tungsten carbide enhancement layers and manufacturing method thereof
CN106180241A (en) * 2016-07-20 2016-12-07 西安理工大学 A kind of high-speed steel Cold Extrusion Punch with micron order tungsten carbide enhancement layer and preparation method thereof
CN106180241B (en) * 2016-07-20 2018-09-21 西安理工大学 A kind of high-speed steel Cold Extrusion Punch and preparation method thereof with micron order tungsten carbide enhancement layer
CN105970149B (en) * 2016-07-20 2018-11-27 西安理工大学 A kind of preparation method of low-carbon high-tungsten alloy steel and low-carbon high-tungsten alloy steel ontology
CN108406084A (en) * 2018-02-08 2018-08-17 西安建筑科技大学 A kind of stirring-head, friction stir weld device and the method for processing magnalium different alloys

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Application publication date: 20160608

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