CN104846182A - Heat treatment method for high-speed steel tool with front guide and rear guide - Google Patents
Heat treatment method for high-speed steel tool with front guide and rear guide Download PDFInfo
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Abstract
The invention provides a heat treatment method for a high-speed steel tool with a front guide and a rear guide. The heat treatment method comprises the following steps: placing the front guide and an edge part of the high-speed steel tool in a salt-bath furnace and carrying out medium-temperature preheating at a preheating temperature of 840-860 DEG C and with a time coefficient of 0.4-0.8min/mm; after the preheating temperature is stable, carrying out high-temperature quenching on the front guide and the edge part placed in the salt-bath furnace at a quenching temperature of 1200-1300 DEG C and with a heat insulation time coefficient of 60S+(8-10)S/mm (for example, the heat insulation time of parts with a diameter of 10mm is 60S+8S/mm*10mm=140S), placing the whole high-speed steel tool in the salt-bath furnace during the final 10S-20S of quenching heating, insulating heat to the required quenching temperature of 950-970 DEG C in a manner of rapid heating, with a heat insulation time coefficient of 5S+(0.8-1.2)S/mm at this moment; carrying out hot pressing and air cooling to a room temperature. With the adoption of the heat treatment method provided by the invention, the deformations and the cracks of the tool due to secondary quenching are effectively avoided, thus saving a correction time, reducing a rejection rate, and ensuring that production is carried out according to nodes.
Description
Technical field
The present invention relates to a kind of front and back and lead high speed steel tool heat treatment method, belong to technical field of heat treatment.
Background technology
At present, the high-speed reamer of leading before and after heat treatment process band, in the cutter processes such as expanding drill, there is a lot of difficulty, such as such cutter leading, although blade and after lead hardness and can reach respectively: front guiding hardness is HRC53-58, blade hardness is HRC63-66, rear guiding hardness is HRC53-58, but (i.e. elder generation's leading and blade of heating and thermal insulation in salt bath furnace is quenched because part speedy steel cutting-tool needs two in quenching process, quench, turn heating and thermal insulation rear pilot again to divide, carry out secondary quenching), therefore in rear guiding and caudal peduncle Quench heating process, easily there is secondary quenching in zone of transition, such one side easily produces flexural deformation, another aspect is easy to be cracked in zone of transition, and then have a strong impact on the quality of cutter, increase the scrap rate of product.
Summary of the invention
For above deficiency, the invention provides a kind of front and back and lead high speed steel tool heat treatment method.
Technical scheme of the present invention: high speed steel tool heat treatment method is led in front and back, adopts following concrete steps:
1) first the leading of speedy steel cutting-tool and blade be put in salt bath furnace and carry out middle temperature preheating, preheating temperature is 840-860 DEG C, and time coefficient is 0.4-0.8min/mm;
2) after preheating temperature is stable, quench hot is carried out to the leading and blade be put in salt bath furnace, quenching temperature is 1200-1300 DEG C, soaking time coefficient 60S+(8 ~ 10) S/mm(is such as, if diameter is 10mm part, then soaking time is 60S+8S/mm × 10mm=140S), in the last 10S-20S of Quench heating, whole speedy steel cutting-tool is transferred in salt bath furnace, be incubated the quenching temperature 950-970 DEG C to requiring by the mode of rapid heating, now soaking time coefficient is 5S+(0.8 ~ 1.2) S/mm;
3) hot pressing, air cooling is to room temperature.
Before hot pressing, whole speedy steel cutting-tool is placed in 400 DEG C of nitrate grooves and is chilled to furnace temperature.
Whole speedy steel cutting-tool, after air cooling to room temperature, cleans it with the hot water of more than 80 DEG C, carries out tempering after quenching is chilled to room temperature within 4 hours.Described tempering divides to be carried out for three times, and tempering temperature is 540-560 DEG C, wherein first time tempering time 1.5-2.5h, second time and third time tempering time 1-2h.
Beneficial effect of the present invention: adopt the present invention, the hardness value led after once can controlling to reach cutter, effectively prevent owing to there is secondary quenching and cutter is deformed and cracks, having saved setting time, reduce scrap rate, ensure to produce and undertaken by node.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment expanding drill.
Fig. 2 is the state graph in embodiment before expanding drill thermal treatment.
Fig. 3 is that in embodiment, expanding drill carries out leading and blade heating condition figure.
Fig. 4 is the state graph that in embodiment, rapid heating led by expanding drill after carrying out.
Embodiment
embodiment one
The heat treating method of rapid steel expanding drill (material is W18Cr4V, and diameter is 10mm), adopts following concrete steps:
1) first the leading of speedy steel cutting-tool and blade be put in salt bath furnace and carry out middle temperature preheating, preheating temperature is 850 DEG C, and time coefficient is 0.4-0.8min/mm;
2) after preheating temperature is stable, quench hot is carried out to the leading and blade be put in salt bath furnace, quenching temperature is 1285 DEG C, soaking time coefficient 60S+8S/mm, soaking time is 140S, in the last 13S of Quench heating, whole speedy steel cutting-tool is transferred in salt bath furnace, be incubated the quenching temperature 950-970 DEG C to requiring by the mode of rapid heating, now soaking time coefficient is 5S+0.8S/mm, and soaking time is 13S;
3) be placed on by whole speedy steel cutting-tool and be chilled to furnace temperature in 400 DEG C of nitrate grooves, hot pressing after taking out, air cooling, to room temperature, then cleans it with the hot water of more than 80 DEG C, quenches after being chilled to room temperature and carried out tempering within 4 hours; Described tempering divides to be carried out for three times, and tempering temperature is 540-560 DEG C, wherein first time tempering time 2h, and second time and for the third time tempering time are respectively 1.5h.
This embodiment process inspection result meets processing requirement: blade hardness be HRC63-66, after to lead hardness be HRC53-58, and cutter is without distortion and crackle.
embodiment two
The heat treating method of rapid steel expanding drill (material is W2Mo9Cr4VCo8, and diameter is 10mm), adopts following concrete steps:
1) first the leading of speedy steel cutting-tool and blade be put in salt bath furnace and carry out middle temperature preheating, preheating temperature is 850 DEG C, and time coefficient is 0.4-0.8min/mm;
2) after preheating temperature is stable, quench hot is carried out to the leading and blade be put in salt bath furnace, quenching temperature is 1190 DEG C, soaking time coefficient 60S+10S/mm, soaking time is 160S, in the last 17S of Quench heating, whole speedy steel cutting-tool is transferred in salt bath furnace, be incubated the quenching temperature 950-970 DEG C to requiring by the mode of rapid heating, now soaking time coefficient is 5S+1.2S/mm, and soaking time is 17S;
3) be placed on by whole speedy steel cutting-tool and be chilled to furnace temperature in 400 DEG C of nitrate grooves, hot pressing after taking out, air cooling, to room temperature, then cleans it with the hot water of more than 80 DEG C, quenches after being chilled to room temperature and carried out tempering within 4 hours; Described tempering divides to be carried out for three times, and tempering temperature is 560 DEG C, wherein first time tempering time 2.2h, and second time and for the third time tempering time are respectively 1.4h.
This embodiment process inspection result meets processing requirement: blade hardness be HRC67-69, after to lead hardness be HRC53-58, and cutter is without distortion and crackle.
embodiment three
The heat treating method of rapid steel expanding drill (material is W6Mo5Cr4V2, and diameter is 10mm), adopts following concrete steps:
1) first the leading of speedy steel cutting-tool and blade be put in salt bath furnace and carry out middle temperature preheating, preheating temperature is 850 DEG C, and time coefficient is 0.4-0.8min/mm;
2) after preheating temperature is stable, quench hot is carried out to the leading and blade be put in salt bath furnace, quenching temperature is 1230 DEG C, soaking time coefficient 60S+10S/mm, in the last 17S of Quench heating, whole speedy steel cutting-tool being transferred in salt bath furnace, being incubated the quenching temperature 950-970 DEG C to requiring by the mode of rapid heating, now soaking time coefficient is 5S+1.2S/mm, and soaking time is 17S;
3) be placed on by whole speedy steel cutting-tool and be chilled to furnace temperature in 400 DEG C of nitrate grooves, hot pressing after taking out, air cooling, to room temperature, then cleans it with the hot water of more than 80 DEG C, quenches after being chilled to room temperature and carried out tempering within 4 hours; Described tempering divides to be carried out for three times, and tempering temperature is 550 DEG C, wherein first time tempering time 2.5h, and second time and for the third time tempering time are respectively 1.2h.
This embodiment process inspection result meets processing requirement: blade hardness be HRC65-68, after to lead hardness be HRC53-58, and cutter is without distortion and crackle.
Claims (4)
1. lead high speed steel tool heat treatment method before and after, it is characterized in that adopting following concrete steps:
1) first the leading of speedy steel cutting-tool and blade be put in salt bath furnace and carry out middle temperature preheating, preheating temperature is 840-860 DEG C, and soaking time coefficient is 0.4-0.8min/mm;
2) after preheating temperature is stable, quench hot is carried out to the leading and blade be put in salt bath furnace, quenching temperature is 1200-1300 DEG C, soaking time coefficient 60S+(8 ~ 10) S/mm, in the last 10S-20S of Quench heating, transferring in salt bath furnace by whole speedy steel cutting-tool, being incubated the quenching temperature 950-970 DEG C to requiring by the mode of rapid heating, now soaking time coefficient is 5S+(0.8 ~ 1.2) S/mm;
3) hot pressing, air cooling is to room temperature.
2. high speed steel tool heat treatment method is led in front and back as claimed in claim 1, it is characterized in that: before hot pressing, is placed on by whole speedy steel cutting-tool in 400 DEG C of nitrate grooves and is chilled to furnace temperature.
3. high speed steel tool heat treatment method is led in front and back as claimed in claim 1, it is characterized in that: whole speedy steel cutting-tool, after air cooling to room temperature, cleans it with the hot water of more than 80 DEG C, carries out tempering after quenching is chilled to room temperature within 4 hours.
4. high speed steel tool heat treatment method is led in front and back as claimed in claim 3, it is characterized in that: described tempering divides to be carried out for three times, and tempering temperature is 540-560 DEG C, wherein first time tempering time 1.5-2.5h, second time and third time tempering time 1-2h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106834630A (en) * | 2017-01-21 | 2017-06-13 | 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 |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106834630A (en) * | 2017-01-21 | 2017-06-13 | 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 |
| 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 |
| 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 |
| 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 |
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