CN109082515A - A kind of tool steel bit heat treatment process - Google Patents
A kind of tool steel bit heat treatment process Download PDFInfo
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- CN109082515A CN109082515A CN201811055958.5A CN201811055958A CN109082515A CN 109082515 A CN109082515 A CN 109082515A CN 201811055958 A CN201811055958 A CN 201811055958A CN 109082515 A CN109082515 A CN 109082515A
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- tool steel
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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
- C21D9/22—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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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of tool steel bit heat treatment process, comprising the following steps: S1, normalized treatment after T12 tool steel blank is heated to 800-880 DEG C, keeps the temperature 15-20 minutes, then take out air-cooled；S2, spheroidizing, by S1 treated T12 tool steel blank is heated to 750-800 DEG C, kept for 2-4 hour, be then cooled to 650-680 DEG C with 30-50 DEG C of speed, kept for 4-6 hours, then cool to 500-550 DEG C with the furnace, finally taking-up is air-cooled to room temperature；S2, basis are pre-designed size, and T12 tool steel blank is processed into tool steel bit blank；Tool steel bit blank is heated to 750-780 DEG C, keeps the temperature 12-18 minutes, then taken out rapidly, be put into cooling oil, kept for 8-10 minutes, then taken out by S3, quenching；Tool steel bit blank is heated to 150-180 DEG C, is kept for 0.5-1 hours, taken out air-cooled by S4, tempering.Process of the present invention is simple, and cost is relatively low, and end properties are no less than existing main product, are appropriate for being mass produced, can effectively improve enterprise competitiveness.
Description
Technical field
The present invention relates to a kind of heat treatment process, more particularly to a kind of tool steel bit heat treatment process.
Background technique
Heat treatment process is usually used in metal product, mainly change metal interior structures, so that it generates different performances,
Such as quenching be hardened, softening of anneal, normalizing elimination stress.It is particularly common especially in steelwork.
Tool steel bit is a kind of common steelwork, it is required that having higher hardness, intensity, while again cannot be excessively strong
Hardness is adjusted, will lead to that material becomes fragile, toughness is lower because really up to the mark, how optimal equalization point is obtained in the two product and just shows
It obtains particularly significant.
Although currently, having there is preferable technology to be heat-treated tool steel bit, while also achieving preferable property
Can, but higher cost, some that these techniques have are excessively complicated, and major part belongs to secrecy technology, regard quotient by enterprise
Industry privacy protection, this, which allows for other people, to know, naturally also can not just be studied.
Therefore, a kind of tool steel bit heat treatment process, process is simple, and cost is relatively low, end properties and market master
Miscarriage product indifference is even slightly better than market main product.
Summary of the invention
In view of the above drawbacks of the prior art, technical problem to be solved by the invention is to provide a kind of tool steel bits
Heat treatment process.
To achieve the above object, the present invention provides a kind of tool steel bit heat treatment process, comprising the following steps:
S1, normalized treatment after T12 tool steel blank is heated to 800-880 DEG C, keeps the temperature 15-20 minutes, then take out air-cooled.
This mainly will refine crystal grain, so that homogenization of composition, while removing forging stress；
S2, spheroidizing, by S1 treated T12 tool steel blank is heated to 750-800 DEG C, kept for 2-4 hours, then with
30-50 DEG C of speed is cooled to 650-680 DEG C, is kept for 4-6 hours, then cools to 500-550 DEG C with the furnace, finally take out air-cooled
To room temperature；This mainly reduces the hardness of T12 tool steel blank, improves cutting ability, while eliminating network cementite, after preventing
Craze and transfiguration when continuous quenching；
S2, basis are pre-designed size, and T12 tool steel blank is processed into tool steel bit blank；
Tool steel bit blank is heated to 750-780 DEG C, keeps the temperature 12-18 minutes, then taken out rapidly, be put into cold by S3, quenching
But it in oil, is kept for 8-10 minutes, is then taken out；
Preferably, choose the barium chloride that weight fraction ratio is 75-78: the salt-mixture of the sodium chloride of 20-22 is heated to 750-780
DEG C, then tool steel bit blank is inserted into salt-mixture, keeps heat preservation 12-18 minute, then takes out oily cold, this design is adopted
It is heat-treated with salt bath, finished product hardness can be effectively improved；
Tool steel bit blank is heated to 150-180 DEG C, is kept for 0.5-1 hours, taken out air-cooled by S4, tempering.This place
Reason mainly eliminates stress when quenching, so that tool steel bit has higher hardness and wearability, while having certain modeling
Property and toughness.
Preferably, when tempering, can take weight percent everybody 50% potassium nitrate and sodium nitrite, be heated to 150-
180 DEG C, then tool steel bit blank is inserted, is taken out after being kept for 0.5-1 hours air-cooled.
The beneficial effects of the present invention are: process of the present invention is simple, cost is relatively low, and end properties are produced no less than existing mainstream
Product are appropriate for being mass produced, and can effectively improve enterprise competitiveness.
Specific embodiment
Below with reference to embodiment, the invention will be further described:
Embodiment one
A kind of tool steel bit heat treatment process, comprising the following steps:
S1, normalized treatment after T12 tool steel blank is heated to 850 DEG C, keeps the temperature 18 minutes, then take out air-cooled；
S2, spheroidizing, by S1 treated T12 tool steel blank is heated to 780 DEG C, kept for 3 hours, then with 35 DEG C of speed
Degree is cooled to 650 DEG C, is kept for 5 hours, then cools to 500 DEG C with the furnace, finally takes out and is air-cooled to room temperature；
S2, basis are pre-designed size, and T12 tool steel blank is processed into tool steel bit blank；
Tool steel bit blank is heated to 770 DEG C, keeps the temperature 16 minutes, then taken out rapidly, be put into cooling oil by S3, quenching,
It is kept for 9 minutes, is then taken out；
Tool steel bit blank is heated to 170 DEG C, is kept for 0.75 hour, taken out air-cooled by S4, tempering.
Embodiment two
A kind of tool steel bit heat treatment process, comprising the following steps:
S1, normalized treatment after T12 tool steel blank is heated to 860 DEG C, keeps the temperature 16 minutes, then take out air-cooled；
S2, spheroidizing, by S1 treated T12 tool steel blank is heated to 790 DEG C, kept for 2 hours, then with 40 DEG C of speed
Degree is cooled to 660 DEG C, is kept for 4.5 hours, then cools to 520 DEG C with the furnace, finally takes out and is air-cooled to room temperature；
S2, basis are pre-designed size, and T12 tool steel blank is processed into tool steel bit blank；
S3, quenching, choose the barium chloride that weight fraction ratio is 77: the salt-mixture of 21 sodium chloride is heated to 760 DEG C, then will
Tool steel bit blank be inserted into salt-mixture in, keep heat preservation 14 minutes, then take out oil it is cold, keep 8 minutes after be tempered at once；
Tool steel bit blank is heated to 180 DEG C, is kept for 0.8 hour, taken out air-cooled by S4, tempering.
Embodiment three
A kind of tool steel bit heat treatment process, comprising the following steps:
S1, normalized treatment after T12 tool steel blank is heated to 850 DEG C, keeps the temperature 20 minutes, then take out air-cooled；
S2, spheroidizing, by S1 treated T12 tool steel blank is heated to 780 DEG C, kept for 7 hours, then with 50 DEG C of speed
Degree is cooled to 650 DEG C, is kept for 4 hours, then cools to 550 DEG C with the furnace, finally takes out and is air-cooled to room temperature；
S2, basis are pre-designed size, and T12 tool steel blank is processed into tool steel bit blank；
Tool steel bit blank is heated to 780 DEG C, keeps the temperature 12 minutes, then taken out rapidly, be put into cooling oil by S3, quenching,
It is kept for 8 minutes, then takes out rapid tempering；
S4, tempering, take weight percent everybody 50% potassium nitrate and sodium nitrite, 160 DEG C are heated to, then by tool steel
Drill bit blank is inserted, and is taken out after being kept for 0.85 hour air-cooled.
Place is not described in detail by the present invention, is the well-known technique of those skilled in the art.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (6)
1. a kind of tool steel bit heat treatment process, which comprises the following steps:
S1, normalized treatment after T12 tool steel blank is heated to 800-880 DEG C, keeps the temperature 15-20 minutes, then take out air-cooled；
S2, spheroidizing, by S1 treated T12 tool steel blank is heated to 750-800 DEG C, kept for 2-4 hours, then with
30-50 DEG C of speed is cooled to 650-680 DEG C, is kept for 4-6 hours, then cools to 500-550 DEG C with the furnace, finally take out air-cooled
To room temperature；
S2, basis are pre-designed size, and T12 tool steel blank is processed into tool steel bit blank；
Tool steel bit blank is heated to 750-780 DEG C, keeps the temperature 12-18 minutes, then taken out rapidly, be put into cold by S3, quenching
But it in oil, is kept for 8-10 minutes, is then taken out；
Tool steel bit blank is heated to 150-180 DEG C, is kept for 0.5-1 hours, taken out air-cooled by S4, tempering.
2. tool steel bit heat treatment process as described in claim 1, it is characterized in that: in S3, including, choose weight fraction ratio
For the barium chloride of 75-78: the salt-mixture of the sodium chloride of 20-22 is heated to 750-780 DEG C, then plugs in tool steel bit blank
Enter in salt-mixture, keep heat preservation 12-18 minutes, it is cold to then take out oil.
3. tool steel bit heat treatment process as described in claim 1, it is characterized in that: in S4, including, when tempering, take weight
Measure percentage everybody 50% potassium nitrate and sodium nitrite, be heated to 150-180 DEG C, tool steel bit blank be then inserted into it
In, it is taken out after being kept for 0.5-1 hours air-cooled.
4. tool steel bit heat treatment process as described in claim 1, it is characterized in that: the following steps are included:
S1, normalized treatment after T12 tool steel blank is heated to 850 DEG C, keeps the temperature 18 minutes, then take out air-cooled；
S2, spheroidizing, by S1 treated T12 tool steel blank is heated to 780 DEG C, kept for 3 hours, then with 35 DEG C of speed
Degree is cooled to 650 DEG C, is kept for 5 hours, then cools to 500 DEG C with the furnace, finally takes out and is air-cooled to room temperature；
S2, basis are pre-designed size, and T12 tool steel blank is processed into tool steel bit blank；
Tool steel bit blank is heated to 770 DEG C, keeps the temperature 16 minutes, then taken out rapidly, be put into cooling oil by S3, quenching,
It is kept for 9 minutes, is then taken out；
Tool steel bit blank is heated to 170 DEG C, is kept for 0.75 hour, taken out air-cooled by S4, tempering.
5. tool steel bit heat treatment process as claimed in claim 2, it is characterized in that: the following steps are included:
S1, normalized treatment after T12 tool steel blank is heated to 860 DEG C, keeps the temperature 16 minutes, then take out air-cooled；
S2, spheroidizing, by S1 treated T12 tool steel blank is heated to 790 DEG C, kept for 2 hours, then with 40 DEG C of speed
Degree is cooled to 660 DEG C, is kept for 4.5 hours, then cools to 520 DEG C with the furnace, finally takes out and is air-cooled to room temperature；
S2, basis are pre-designed size, and T12 tool steel blank is processed into tool steel bit blank；
S3, quenching, choose the barium chloride that weight fraction ratio is 77: the salt-mixture of 21 sodium chloride is heated to 760 DEG C, then will
Tool steel bit blank be inserted into salt-mixture in, keep heat preservation 14 minutes, then take out oil it is cold, keep 8 minutes after be tempered at once；
Tool steel bit blank is heated to 180 DEG C, is kept for 0.8 hour, taken out air-cooled by S4, tempering.
6. tool steel bit heat treatment process as claimed in claim 3, it is characterized in that: the following steps are included:
S1, normalized treatment after T12 tool steel blank is heated to 850 DEG C, keeps the temperature 20 minutes, then take out air-cooled；
S2, spheroidizing, by S1 treated T12 tool steel blank is heated to 780 DEG C, kept for 7 hours, then with 50 DEG C of speed
Degree is cooled to 650 DEG C, is kept for 4 hours, then cools to 550 DEG C with the furnace, finally takes out and is air-cooled to room temperature；
S2, basis are pre-designed size, and T12 tool steel blank is processed into tool steel bit blank；
Tool steel bit blank is heated to 780 DEG C, keeps the temperature 12 minutes, then taken out rapidly, be put into cooling oil by S3, quenching,
It is kept for 8 minutes, then takes out rapid tempering；
S4, tempering, take weight percent everybody 50% potassium nitrate and sodium nitrite, 160 DEG C are heated to, then by tool steel
Drill bit blank is inserted, and is taken out after being kept for 0.85 hour air-cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811055958.5A CN109082515A (en) | 2018-09-11 | 2018-09-11 | A kind of tool steel bit heat treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811055958.5A CN109082515A (en) | 2018-09-11 | 2018-09-11 | A kind of tool steel bit heat treatment process |
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| Publication Number | Publication Date |
|---|---|
| CN109082515A true CN109082515A (en) | 2018-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811055958.5A Withdrawn CN109082515A (en) | 2018-09-11 | 2018-09-11 | A kind of tool steel bit heat treatment process |
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| CN (1) | CN109082515A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110527817A (en) * | 2019-08-19 | 2019-12-03 | 西北矿冶研究院 | Heat treatment method for hot-setting tooth bit body |
| CN111876564A (en) * | 2020-07-14 | 2020-11-03 | 昆山正通铭金属有限公司 | Spheroidizing annealing process of hexagonal alloy tool steel S2 |
-
2018
- 2018-09-11 CN CN201811055958.5A patent/CN109082515A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110527817A (en) * | 2019-08-19 | 2019-12-03 | 西北矿冶研究院 | Heat treatment method for hot-setting tooth bit body |
| CN110527817B (en) * | 2019-08-19 | 2021-07-13 | 西北矿冶研究院 | Heat treatment method for hot-setting tooth bit body |
| CN111876564A (en) * | 2020-07-14 | 2020-11-03 | 昆山正通铭金属有限公司 | Spheroidizing annealing process of hexagonal alloy tool steel S2 |
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Application publication date: 20181225 |
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| WW01 | Invention patent application withdrawn after publication |