CN104451106A - Heat treatment process of high-speed steel taper shank twist drill - Google Patents

Heat treatment process of high-speed steel taper shank twist drill Download PDF

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Publication number
CN104451106A
CN104451106A CN201310423815.6A CN201310423815A CN104451106A CN 104451106 A CN104451106 A CN 104451106A CN 201310423815 A CN201310423815 A CN 201310423815A CN 104451106 A CN104451106 A CN 104451106A
Authority
CN
China
Prior art keywords
twist drill
taper shank
thermal treatment
steel taper
shank twist
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
CN201310423815.6A
Other languages
Chinese (zh)
Inventor
李少洋
Original Assignee
李少洋
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.)
Filing date
Publication date
Application filed by 李少洋 filed Critical 李少洋
Priority to CN201310423815.6A priority Critical patent/CN104451106A/en
Publication of CN104451106A publication Critical patent/CN104451106A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • C21D1/26Methods of annealing
    • 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
    • C21D6/00Heat treatment of ferrous alloys
    • 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/22Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for drills; for milling cutters; for machine cutting tools

Abstract

The invention discloses a heat treatment process of a high-speed steel taper shank twist drill, which comprises: annealing, preheating, quenching, cooling, and tempering. The high-speed steel is provided with high hardness, strength, red hardness, wear resistance, and certain toughness after heat treatment, and thus meets the requirements for twist drill application performance.

Description

A kind of thermal treatment process of rapid steel taper shank twist drill
technical field
The invention belongs to technical field of heat treatment, particularly relate to a kind of thermal treatment process of rapid steel taper shank twist drill.
Background technology
Twist drill is most widely used hole machined instrument.General diameter scope is 0.25-80 millimeter.It is formed primarily of working portion and shank.Very high unit pressure to be born during bit operation, and along with generation high temperature, so drill bit may be made in operating process to fracture and distortion.
Summary of the invention
Object of the present invention, for providing a kind of thermal treatment process of rapid steel taper shank twist drill, solves the above-mentioned problem mentioned.
The present invention is achieved in the following ways: thermal treatment process flow process is: annealing-preheating-quenching-cooling-tempering.
Annealing temperature is 840 ~ 860oC, and soaking time is that the speed of 3 ~ 4h, 10 ~ 20oC/h is chilled to below 500oC with stove and comes out of the stove.
Will carry out preheating before quenching, preheating temperature is 840-860oC, and the soaking time in salt bath calculates by 1-2min/mm.
Insulation 20min, is then heated to 1220 DEG C in a vacuum furnace, insulation 3min.
Salt bath marquenching temperature is 600 DEG C, insulation 3min air cooling.
Tempering temperature is 560 DEG C, insulation 1h, in triplicate.
Beneficial effect of the present invention is: rapid steel common bluebeard can obtain high hardness, intensity, red hardness, wear resistance and certain toughness after Overheating Treatment, thus meets the requirement of twist drill use properties.
Embodiment
Annealing, temperature is 860 DEG C, soaking time 3h.Then cold with the speed stove of 20 DEG C/h, to air cooling of coming out of the stove when 500 DEG C.
Quenching: first carry out preheating before quenching, be preheating to 860 DEG C in salt bath furnace, insulation 20min, is then heated to 1220 DEG C in a vacuum furnace, insulation 3min, and salt bath marquenching temperature is 600 DEG C, insulation 3min air cooling.Tempering: tempering temperature is 560 DEG C, insulation 1h, in triplicate.

Claims (6)

1. a thermal treatment process for rapid steel taper shank twist drill, is characterized in that: thermal treatment process flow process is: annealing-preheating-quenching-cooling-tempering.
2. the thermal treatment process of the rapid steel taper shank twist drill according to claims 1, is characterized in that: annealing temperature is 840 ~ 860oC, and soaking time is that the speed of 3 ~ 4h, 10 ~ 20oC/h is chilled to below 500oC with stove and comes out of the stove.
3. the thermal treatment process of the rapid steel taper shank twist drill according to claims 1, is characterized in that: will carry out preheating before quenching, preheating temperature is 840-860oC, and the soaking time in salt bath calculates by 1-2min/mm.
4. the thermal treatment process of the rapid steel taper shank twist drill according to claims 1, is characterized in that: insulation 20min, is then heated to 1220 DEG C in a vacuum furnace, insulation 3min.
5. the thermal treatment process of the rapid steel taper shank twist drill according to claims 1, is characterized in that: salt bath marquenching temperature is 600 DEG C, insulation 3min air cooling.
6. the thermal treatment process of the rapid steel taper shank twist drill according to claims 1, is characterized in that: tempering temperature is 560 DEG C, insulation 1h, in triplicate.
CN201310423815.6A 2013-09-17 2013-09-17 Heat treatment process of high-speed steel taper shank twist drill Pending CN104451106A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310423815.6A CN104451106A (en) 2013-09-17 2013-09-17 Heat treatment process of high-speed steel taper shank twist drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310423815.6A CN104451106A (en) 2013-09-17 2013-09-17 Heat treatment process of high-speed steel taper shank twist drill

Publications (1)

Publication Number Publication Date
CN104451106A true CN104451106A (en) 2015-03-25

Family

ID=52897848

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310423815.6A Pending CN104451106A (en) 2013-09-17 2013-09-17 Heat treatment process of high-speed steel taper shank twist drill

Country Status (1)

Country Link
CN (1) CN104451106A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107058710A (en) * 2017-04-10 2017-08-18 成都亨通兆业精密机械有限公司 Reduce the drill produced technique of crystal defect

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107058710A (en) * 2017-04-10 2017-08-18 成都亨通兆业精密机械有限公司 Reduce the drill produced technique of crystal defect

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Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20150325

WD01 Invention patent application deemed withdrawn after publication