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A method for preparing a low-defect high-performance high-speed steel wire

A high-speed steel, high-performance technology, applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., can solve the problems of insufficient processing performance of high-speed steel wire rods, and achieve the effects of eliminating structural defects, good processing and usable performance, and less structural defects

Inactive Publication Date: 2018-06-29
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Technical problem: The object of the present invention is to provide a method for preparing low-defect high-performance high-speed steel wire rods, which can eliminate the structural defects produced in the processing process, and solve the problem of insufficient processing performance of high-speed steel wire rods produced by traditional processes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The M42 high-speed steel wire rod is processed as follows:

[0023] (1) Heat the high-speed steel wire rod to 840 ° C for 4 hours to fully austenitize;

[0024] (2) Rapidly cool the wire to 770°C at a cooling rate of 2°C / min;

[0025] (3) Isothermal at 770°C for 2 hours to fully homogenize the tissue;

[0026] (4) Furnace cooling to 500°C and air cooling.

Embodiment 2

[0028] The M42 high-speed steel wire rod is processed as follows:

[0029] (1) Heat the high-speed steel wire rod to 860 ° C for 3 hours to fully austenitize;

[0030] (2) Rapidly cool the wire rod to 760°C at a cooling rate of 4°C / min;

[0031] (3) Isothermal at 760°C for 2.5 hours to fully homogenize the tissue;

[0032] (4) Furnace cooling to 480°C and air cooling.

Embodiment 3

[0034] The M42 high-speed steel wire rod is processed as follows:

[0035] (1) Heat the high-speed steel wire rod to 870 ° C for 2 hours to fully austenitize;

[0036] (2) Rapidly cool the wire rod to 755°C at a cooling rate of 5°C / min;

[0037] (3) Isothermal at 755°C for 3 hours to fully homogenize the tissue;

[0038] (4) Furnace cooling to 550°C and air cooling.

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Abstract

The invention relates to a method for preparing a low-defect high-performance high-speed steel wire. The method can eliminate structure defects of the high-speed steel wire and can improve wire structure quality and performance. The method is mainly characterized in that after high-speed steel is heated to 840-900 DEG C and fully austenitized, the steel is rapidly cooled to 730-780 DEG C at a cooling speed of not less than 2 DEG C / min, is maintained at the temperature for 30 min to 6 h, and then is cooled in a furnace to about 500 DEG C, and then a product is discharged from the furnace. The high-speed steel wire produced by the method has advantages of few structure defects, high structure quality, and the like and has good comprehensive mechanical performance.

Description

technical field [0001] The invention relates to a method for preparing a low-defect high-performance high-speed steel wire rod, in particular to a method for eliminating structural defects of the high-speed steel wire rod and improving its structure quality and comprehensive performance. Background technique [0002] Due to its high hardness, high wear resistance, good red hardness and other advantages, high-speed steel is widely used in the manufacture of various high-efficiency precision machining tools such as milling cutters, gear planers, turning tools, twist drills, bimetal saw blades, etc. It is a modern high-end An important basic material for the equipment manufacturing industry. [0003] High-speed steel tools are made of high-speed steel rods and wires. The preparation process is: smelting→refining→casting→electroslag remelting→forging→rolling→cold drawing / cold rolling→rods / wires. Due to the composition and structure characteristics of high-speed steel, high-spee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/52C21D1/26
CPCC21D9/52C21D1/26
Inventor 周雪峰郑志霞方峰蒋建清
Owner SOUTHEAST UNIV
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