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Technique for thermal-treatment processing of high speed steel tools

A process method and high-speed steel technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve problems such as waste products, low work efficiency, and cumbersome operation process

Active Publication Date: 2014-12-24
SHENYANG AIRCRAFT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operation process is cumbersome, the work efficiency is low, and often due to the phenomenon of secondary heating, the rear guide part is cracked and waste products are generated.

Method used

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Examples

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Embodiment Construction

[0013] A process method for heat treatment processing of Ф8mm high speed steel cutting tools, including the following steps:

[0014] 1) The tail handle of the clamping tool;

[0015] 2) Put the whole of the tool in a medium temperature salt furnace at 850℃ for heat preservation. The heat preservation time is (0.4~0.8) min / mm×tool diameter=0.6 min / mm×8mm=4.8min, so that the overall hardness of the tool is HRC33-48, then air cooling;

[0016] 3) Calculate the holding time shared between the medium temperature salt furnace and the high temperature salt furnace:

[0017] S=1 minute+(4~6) second / mm·L=1 minute+6 seconds / mm×8mm=1 minute and 48 seconds;

[0018] 4) Put the leading and blades of the tool into a high temperature salt furnace at 1275℃ for heat preservation. After 1 minute and 40 seconds, put the leading, blade and trailing parts of the tool in the high temperature salt furnace for 8 seconds In this way, the leading and cutting edge hardness of the tool is 63-66, and the trailin...

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Abstract

The invention relates to a technique for thermal-treatment processing of high speed steel tools. The technique comprises the following steps of: clamping tail handles of the tools; performing thermal preservation on the whole tools which are put into a medium-temperature salt furnace at 850 DEG C to enable the overall hardness of the tools to reach HRC (Rockwell hardness) 33-48, and then performing air cooling on the tools; performing thermal preservation on the precursors and edge parts of the tools in a high-temperature salt furnace at 1275 DEG C, and after a while, putting the precursors, edge parts and posterior bite guides of the tools into the high-temperature salt furnace to enable the hardness of the precursors and the edge parts to reach HRC 63-66, and the hardness of the posterior bite guides to reach HRC 53-58; and annealing the precursors to enable the hardness of the precursors to reach HRC 53-58. According to the technique, the different hardness of the different positions is achieved mainly by controlling the time of the tools in heating media, so that complicated processing steps are omitted, the working efficiency is greatly improved, the production period of the high-speed steel tools is shortened, and simultaneously, waste products are reduced.

Description

Technical field [0001] The invention relates to a process method for heat treatment processing of high-speed steel cutters, which is suitable for the heat treatment process of high-alloy tool steel acting as cutters. Background technique [0002] High-speed steel is a high-alloy tool steel containing more alloying elements such as w, Mo, Cr, V, etc. It has higher bending strength and good willfulness. Its hardness at room temperature is 62~66HRC, and its heat resistance is about 600~660℃ . The cutting edge is easy to be sharp when sharpening, so it is often called "front steel" in production, and polished high-speed steel is also called white steel. [0003] High-speed steel is one of the well-known steels for cutting tools. Although the share of hard materials such as cemented carbide is increasing in the high-speed cutting of single-edged tools and difficult-to-machine materials, high-speed steel is still the mainstay for multi-edged tools, cutting processing subjected to shock...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/22
Inventor 徐强邓楠
Owner SHENYANG AIRCRAFT CORP
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