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Tool steel heat treatment process

A tool steel and process technology, applied in the field of tool steel heat treatment process, can solve the problems of high brittleness and zero failure, and achieve the effect of improving strength and toughness and preventing premature fracture and failure

Inactive Publication Date: 2016-06-08
CHONGQING GUIKUN MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the obvious disadvantage of this steel is its high brittleness, which often leads to zero early failure.

Method used

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Embodiment Construction

[0006] Below in conjunction with embodiment the present invention will be further described, and its operating steps are as follows:

[0007] A tool steel heat treatment process, the material is W18Cr4V, the process method includes the following steps: (1) Forging treatment: preheating temperature 750°C-850°C, heating temperature 1100°C-1200°C, initial forging temperature 1000°C-1200°C , the final forging temperature is 900 ° C ~ 950 ° C, slow cooling; when forging, repeat pier rough drawing and lengthening for no less than 4 times; during forging, when the temperature is > 1100 ° C, hit lightly; when the temperature is 1000 ~ 1100 ° C, hit hard; (2) Spheroidizing annealing treatment: heating and raising the temperature to 950°C at a rate of ≤90°C / h, then furnace cooling at a rate of 30-60°C / h to 850°C, and then furnace cooling at 30°C -50°C / h speed to furnace cooling 450°C, and then air-cooling; (3) Quenching and tempering treatment: the first preheating is 550-600°C, holding...

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Abstract

The invention discloses a tool steel heat treatment process; and a material is W18Cr4V. The process is characterized by comprising the steps of: (1) forging treatment; (2) spheroidizing annealing treatment; (3) thermal refining; (4) quenching treatment; and (5) tempering treatment: the tempering temperature is 150-180 DEG C, and the time is 3-4 hours. The tool steel heat treatment process can improve the toughness of tool steel to prevent fracture failure of the tool steel too early through specifying all step requirements, parameter conditions and notes.

Description

technical field [0001] The invention belongs to the field of heat treatment technology, in particular to a tool steel heat treatment technology. Background technique [0002] W18Cr4V is a tool steel of tungsten high-speed steel, which has high hardness, red hardness and high temperature hardness. Its heat treatment range is wide, quenching is not easy to overheat, the heat treatment process is not easy to oxidize and decarburize, and the grinding performance is good. The hardness of the steel is maintained at HRC57-58 and HRC52-53 at 500°C and 600°C respectively, and it has good cutting performance for a large number of general processed materials. But the obvious disadvantage of this steel is its high brittleness, which often leads to zero early failure. Therefore, how to improve its strength and toughness and prevent its premature failure is a problem that users of this steel often encounter and need to solve. The failure analysis of parts shows that the heat treatment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/00
Inventor 钟传梅
Owner CHONGQING GUIKUN MACHINERY CO LTD
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