CN110904309A - Heat treatment process of Gcr15 steel drill bit - Google Patents
Heat treatment process of Gcr15 steel drill bit Download PDFInfo
- Publication number
- CN110904309A CN110904309A CN201811085701.4A CN201811085701A CN110904309A CN 110904309 A CN110904309 A CN 110904309A CN 201811085701 A CN201811085701 A CN 201811085701A CN 110904309 A CN110904309 A CN 110904309A
- Authority
- CN
- China
- Prior art keywords
- drill bit
- heat treatment
- treatment process
- quenching
- gcr15 steel
- 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
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Classifications
-
- 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
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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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/60—Aqueous agents
-
- 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
- C21D9/22—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for drills; for milling cutters; for machine cutting tools
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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 Articles (AREA)
Abstract
A heat treatment process of a Gcr15 steel drill bit is characterized in that in the quenching step of the heat treatment process of the Gcr15 steel drill bit, the drill bit is vertically hung and placed into a quenching furnace, then the temperature in the furnace is raised to 840-850 ℃, the temperature is kept for 30 minutes, then the drill bit is taken out and integrally quenched into a quenching medium for 3-5 seconds, then a shank part is lifted out of the surface of a potassium nitrate solution, the cooling is carried out to 120-140 ℃, then the drill bit is completely lifted out of the quenching medium, and the air cooling is carried out to the room temperature. The product can ensure the hardness and strength requirements of the cutter handle and the cutting edge part simultaneously, is simple and safe to operate, has simple procedures, can obviously improve the cutting processing capacity of the drill bit, prolongs the service life, reduces the cutter cost in production, and has popularization and application values.
Description
Technical Field
The invention relates to a heat treatment process for a metal cutter, in particular to a heat treatment process for a Gcr15 steel drill bit.
Background
At present, a Gcr15 steel drill bit is structurally divided into a tool handle and a cutting edge part, wherein the hardness requirement of the tool handle part is HRC 25-30, the hardness requirement of the cutting edge part is HRC 60-64, the hardness requirements of the two parts are different, so the heat treatment process requirement is special, the conventional heat treatment method is that the drill bit is integrally heated to 840-850 ℃, is immersed in nitrate for 3-5 seconds and then is extracted, is integrally quenched, then the tool handle part of the drill bit is tempered at low temperature, is heated to 210-240 ℃, and then is cooled to room temperature along with a furnace, so the heat treatment process is adopted, cracks or early fractures easily occur at the joint of the tool handle part and the cutting edge part, the service life of a cutter is short, and the impact resistance toughness of the cutter.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the heat treatment process of the Gcr15 steel drill bit, which can simultaneously meet the requirements on the hardness and the strength of the cutter handle and the cutting edge, is simple, convenient and safe to operate and has long service life.
In order to realize the purpose, in the quenching step of the heat treatment process of the Gcr15 steel drill bit, the drill bit is vertically hung and loaded into a quenching furnace, then the temperature in the furnace is raised to 840-850 ℃, the temperature is kept for 30 minutes, then the drill bit is taken out and integrally quenched into a quenching medium for 3-5 seconds, then the part of a tool shank is lifted out of the surface of potassium nitrate solution, the tool shank is cooled to 120-140 ℃, then the drill bit is completely lifted out of the quenching medium, and the air cooling is carried out to the room temperature.
The further scheme of the invention is as follows: the quenching medium is potassium nitrate solution.
By adopting the processing method, the product can simultaneously ensure the hardness and strength requirements of the cutter handle and the cutting edge, is simple and safe to operate, has simple procedures, can obviously improve the cutting processing capacity of the drill bit, prolongs the service life, reduces the cost of the cutter during production, and has popularization and application values.
Detailed Description
In the quenching step of the heat treatment process of the Gcr15 steel drill bit, the drill bit is vertically hung and loaded into a quenching furnace, then the temperature in the furnace is raised to 840-850 ℃, the temperature is kept for 30 minutes, then the drill bit is taken out and integrally quenched into a quenching medium for 3-5 seconds, then the part of a tool shank is lifted out of the surface of potassium nitrate solution, the tool shank is cooled to 120-140 ℃, then the drill bit is completely lifted out of the quenching medium, and the tool shank is air-cooled to room temperature.
Further, the method comprises the following steps: the quenching medium is potassium nitrate solution.
Claims (2)
1. A heat treatment process of a Gcr15 steel drill bit is characterized in that in the quenching step of the heat treatment process of the Gcr15 steel drill bit, the drill bit is vertically hung and placed into a quenching furnace, then the temperature in the furnace is raised to 840-850 ℃, the temperature is kept for 30 minutes, then the drill bit is taken out and integrally quenched into a quenching medium for 3-5 seconds, then a shank part is lifted out of the surface of a potassium nitrate solution, the cooling is carried out to 120-140 ℃, then the drill bit is completely lifted out of the quenching medium, and the air cooling is carried out to the room temperature.
2. The heat treatment process of the Gcr15 steel drill bit as claimed in claim 1, wherein the quenching medium is potassium nitrate solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811085701.4A CN110904309A (en) | 2018-09-18 | 2018-09-18 | Heat treatment process of Gcr15 steel drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811085701.4A CN110904309A (en) | 2018-09-18 | 2018-09-18 | Heat treatment process of Gcr15 steel drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110904309A true CN110904309A (en) | 2020-03-24 |
Family
ID=69813747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811085701.4A Pending CN110904309A (en) | 2018-09-18 | 2018-09-18 | Heat treatment process of Gcr15 steel drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110904309A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114480797A (en) * | 2022-01-27 | 2022-05-13 | 石狮市汇星机械有限公司 | Heat treatment process method for producing knitting machine cam by using GCr15 steel |
-
2018
- 2018-09-18 CN CN201811085701.4A patent/CN110904309A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114480797A (en) * | 2022-01-27 | 2022-05-13 | 石狮市汇星机械有限公司 | Heat treatment process method for producing knitting machine cam by using GCr15 steel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200324 |