CN104846182B - It is front and rear to lead high speed steel tool heat treatment method - Google Patents
It is front and rear to lead high speed steel tool heat treatment method Download PDFInfo
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Abstract
The present invention leads high speed steel tool heat treatment method before and after providing one kind, and first the leading and blade of high-speed steel tool is put into salt bath furnace carries out middle temperature preheating, and preheating temperature is 840 860 DEG C, and time coefficient is 0.4 0.8min/mm；After after preheating temperature stabilization, the leading and blade to being put into salt bath furnace carries out high temperature quenching, and hardening heat is 1,200 1300 DEG C, soaking time coefficient 60s+（8~10）s/mm（For example, if diameter is 10mm parts, soaking time is 60s+8s/mm × 10mm=140s）, in the last 10S 20S of Quench heating, during whole high-speed steel tool transferred into salt bath furnace, it is incubated by way of quick heating to 950 970 DEG C of desired hardening heat, now soaking time coefficient is 5s+（0.8~1.2）s/mm；Hot pressing, is air cooled to room temperature.Using the present invention, effectively prevent makes cutter deform and crack due to there is secondary quenching, has saved correction time, reduces percent defective, it is ensured that production is carried out by node.
Description
Technical field
The present invention relates to lead high speed steel tool heat treatment method before and after one kind, belong to technical field of heat treatment.
Background technology
At present, during the cutters such as high-speed reamer, the reamer led before and after heat treatment process band, exist many tired
Difficulty, although the leading of such as such cutter, blade and after lead hardness and can respectively reach：Preceding guiding hardness is HRC53-58, sword
Portion's hardness is HRC63-66, rear guiding hardness is HRC53-58, but because part high-speed steel tool needs in quenching process
Two quenches（I.e. first heating and thermal insulation is leading and blade in salt bath furnace, is quenched, then turn heating and thermal insulation rear pilot
Point, carry out secondary quenching）, therefore during rear guiding and caudal peduncle Quench heating, transition region is susceptible to secondary quenching, so
On the one hand flexural deformation is easily produced, is on the other hand easily cracked in transition region, and then had a strong impact on the quality of cutter, increase
Plus the percent defective of product.
The content of the invention
Not enough for more than, the present invention leads high speed steel tool heat treatment method before and after providing one kind.
Technical scheme：It is front and rear to lead high speed steel tool heat treatment method, using step in detail below：
1）First the leading and blade of high-speed steel tool is put into salt bath furnace carries out middle temperature preheating, and preheating temperature is 840-
860 DEG C, time coefficient is 0.4-0.8min/mm；
2）After after preheating temperature stabilization, the leading and blade to being put into salt bath furnace carries out high temperature quenching, and hardening heat is
1200-1300 DEG C, soaking time coefficient 60S+（8~10）S /mm（For example, if diameter is 10mm parts, soaking time is
60S+8S/mm×10mm=140S）, in the last 10S-20S of Quench heating, whole high-speed steel tool is transferred into salt bath furnace
In, it is incubated by way of quick heating to 950-970 DEG C of desired hardening heat, now soaking time coefficient is 5S+（0.8~
1.2）S/mm；
3）Hot pressing, is air cooled to room temperature.
Before hot pressing, whole high-speed steel tool is placed in 400 DEG C of nitrate grooves and is cooled to furnace temperature.
Whole high-speed steel tool is cleaned with more than 80 DEG C of hot water after room temperature is air cooled to it, and quenching is cooled to room
It is tempered within 4 hours after temperature.The tempering is carried out in three times, and temperature is 540-560 DEG C, wherein for the first time
Tempering time 1.5-2.5h, second and third time tempering time 1-2h.
Beneficial effects of the present invention：Using the present invention, can a secondary control reach the hardness number led after cutter, effectively prevent
Cutter is deformed and is cracked due to there is secondary quenching, saved correction time, reduce percent defective, it is ensured that be raw
Product is carried out by node.
Brief description of the drawings
Fig. 1 is the structural representation of embodiment reamer.
Fig. 2 is the state diagram before reamer heat treatment in embodiment.
Fig. 3 is the state diagram that reamer carries out the heating of leading and blade in embodiment.
Fig. 4 is the state diagram that reamer leads quick heating after carrying out in embodiment.
Specific embodiment
Embodiment one
High-speed steel reamer（Material is W18Cr4V, a diameter of 10mm）Heat treatment method, using step in detail below：
1）First the leading and blade of high-speed steel tool is put into salt bath furnace carries out middle temperature preheating, and preheating temperature is 850 DEG C,
Time coefficient is 0.4-0.8min/mm；
2）After after preheating temperature stabilization, the leading and blade to being put into salt bath furnace carries out high temperature quenching, and hardening heat is
1285 DEG C, soaking time coefficient 60S+8S/mm, soaking time is 140S, in the last 13S of Quench heating, will entirely at a high speed
Steel cutter is transferred in salt bath furnace, is incubated by way of quick heating to 950-970 DEG C of desired hardening heat, is now incubated
Time coefficient is 5S+0.8S/mm, and soaking time is 13S；
3）Whole high-speed steel tool is placed in 400 DEG C of nitrate grooves and is cooled to furnace temperature, hot pressing after taking-up is air cooled to room
Temperature, is then cleaned with more than 80 DEG C of hot water to it, and quenching is tempered after being cooled to room temperature within 4 hours；It is described
Tempering is carried out in three times, and temperature is 540-560 DEG C, wherein first time tempering time 2h, second and third time tempering
Time is respectively 1.5h.
The embodiment process inspection result meets technological requirement：Blade hardness be HRC63-66, after lead hardness for HRC53-
58, and cutter is without deformation and crackle.
Embodiment two
High-speed steel reamer（Material is W2Mo9Cr4VCo8, a diameter of 10mm）Heat treatment method, using in detail below
Step：
1）First the leading and blade of high-speed steel tool is put into salt bath furnace carries out middle temperature preheating, and preheating temperature is 850 DEG C,
Time coefficient is 0.4-0.8min/mm；
2）After after preheating temperature stabilization, the leading and blade to being put into salt bath furnace carries out high temperature quenching, and hardening heat is
1190 DEG C, soaking time coefficient 60S+10S/mm, soaking time is 160S, in the last 17S of Quench heating, will be whole high
Fast steel cutter is transferred in salt bath furnace, is incubated by way of quick heating to 950-970 DEG C of desired hardening heat, is now protected
Warm time coefficient is 5S+1.2S/mm, and soaking time is 17S；
3）Whole high-speed steel tool is placed in 400 DEG C of nitrate grooves and is cooled to furnace temperature, hot pressing after taking-up is air cooled to room
Temperature, is then cleaned with more than 80 DEG C of hot water to it, and quenching is tempered after being cooled to room temperature within 4 hours；It is described
Tempering is carried out in three times, and temperature is 560 DEG C, wherein first time tempering time 2.2h, when being tempered for the second time and for the third time
Between be respectively 1.4h.
The embodiment process inspection result meets technological requirement：Blade hardness be HRC67-69, after lead hardness for HRC53-
58, and cutter is without deformation and crackle.
Embodiment three
High-speed steel reamer（Material is W6Mo5Cr4V2, a diameter of 10mm）Heat treatment method, using walking in detail below
Suddenly：
1）First the leading and blade of high-speed steel tool is put into salt bath furnace carries out middle temperature preheating, and preheating temperature is 850 DEG C,
Time coefficient is 0.4-0.8min/mm；
2）After after preheating temperature stabilization, the leading and blade to being put into salt bath furnace carries out high temperature quenching, and hardening heat is
1230 DEG C, whole high-speed steel tool in the last 17S of Quench heating, is transferred to salt by soaking time coefficient 60S+10S/mm
In liquid furnace, it is incubated by way of quick heating to 950-970 DEG C of desired hardening heat, now soaking time coefficient is 5S+
1.2S/mm, soaking time is 17S；
3）Whole high-speed steel tool is placed in 400 DEG C of nitrate grooves and is cooled to furnace temperature, hot pressing after taking-up is air cooled to room
Temperature, is then cleaned with more than 80 DEG C of hot water to it, and quenching is tempered after being cooled to room temperature within 4 hours；It is described
Tempering is carried out in three times, and temperature is 550 DEG C, wherein first time tempering time 2.5h, when being tempered for the second time and for the third time
Between be respectively 1.2h.
The embodiment process inspection result meets technological requirement：Blade hardness be HRC65-68, after lead hardness for HRC53-
58, and cutter is without deformation and crackle.
Claims (4)
1. high speed steel tool heat treatment method is led before and after, it is characterised in that using step in detail below：
1）First the leading and blade of high-speed steel tool is put into salt bath furnace carries out middle temperature preheating, and preheating temperature is 840-860 DEG C,
Soaking time coefficient is 0.4-0.8min/mm；
2）After after preheating temperature stabilization, the leading and blade to being put into salt bath furnace carries out high temperature quenching, and hardening heat is 1200-
1300 DEG C, soaking time coefficient 60s+（8~10）S/mm, in the last 10s-20s of Quench heating, by whole high-speed steel tool
In transferring to salt bath furnace, it is incubated by way of quick heating to 950-970 DEG C of desired hardening heat, now soaking time system
Number is 5s+（0.8~1.2）s/mm；
3）Hot pressing, is air cooled to room temperature.
It is 2. front and rear as claimed in claim 1 to lead high speed steel tool heat treatment method, it is characterised in that：Before hot pressing, will be whole high
Fast steel cutter is cooled to furnace temperature in being placed on 400 DEG C of nitrate grooves.
It is 3. front and rear as claimed in claim 1 to lead high speed steel tool heat treatment method, it is characterised in that：Whole high-speed steel tool exists
After being air cooled to room temperature, it is cleaned with more than 80 DEG C of hot water, quenching is returned after being cooled to room temperature within 4 hours
Fire.
It is 4. front and rear as claimed in claim 3 to lead high speed steel tool heat treatment method, it is characterised in that：The tempering is entered in three times
OK, temperature is 540-560 DEG C, wherein first time tempering time 1.5-2.5h, second and third time tempering time 1-
2h。
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| CN106834630B (en) * | 2017-01-21 | 2018-04-17 | 莆田市恒达机电实业有限公司 | A kind of cutting die steel Quenching Production Line, process for quenching and cutting die steel processing method |
| CN108406084B (en) * | 2018-02-08 | 2021-12-14 | 西安建筑科技大学 | Stirring head, friction stir welding device and method for processing magnesium-aluminum dissimilar alloy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453797A (en) * | 2010-11-01 | 2012-05-16 | 贵州航天风华精密设备有限公司 | One-time heat treatment method of integral high-speed steel cutter |
| CN102796860A (en) * | 2012-09-12 | 2012-11-28 | 沈阳飞机工业（集团）有限公司 | Technique for thermal-treatment processing of high speed steel tools |
| CN102808075A (en) * | 2012-09-13 | 2012-12-05 | 沈阳飞机工业（集团）有限公司 | Heat treatment technology method for high-speed steel-disc milling cutter |
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2015
- 2015-06-17 CN CN201510333767.0A patent/CN104846182B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453797A (en) * | 2010-11-01 | 2012-05-16 | 贵州航天风华精密设备有限公司 | One-time heat treatment method of integral high-speed steel cutter |
| CN102796860A (en) * | 2012-09-12 | 2012-11-28 | 沈阳飞机工业（集团）有限公司 | Technique for thermal-treatment processing of high speed steel tools |
| CN102808075A (en) * | 2012-09-13 | 2012-12-05 | 沈阳飞机工业（集团）有限公司 | Heat treatment technology method for high-speed steel-disc milling cutter |
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