Method for improving strength of tool body of planer tool

Abstract

The invention relates to the field of tool machining methods, and particularly discloses a method for improving the strength of a tool body of a planer tool. The method mainly adopts a brazing step, an isothermal quenching step and a brine quenching step; according to the brazing step, the maximum temperature and the temperature rising speed can be controlled, the time of 45 steel being in austenitization is reduced, the situation that the grain size of the 45 steel is excessively coarse is prevented, it can be ensured that the tool body has the high strength, and the welding strength in the brazing step can be improved accordingly; and meanwhile, the isothermal quenching step and the brine quenching step can enhance the strength of the whole planer tool. According to the schemed of the method for improving the strength of the tool body of the planer tool, the strength of the tool body can be improved, and the strength of the whole planer tool is improved accordingly.

Description

technical field [0001] The invention belongs to the field of tool processing methods, and in particular relates to a method for improving the strength of a planer tool body. Background technique [0002] At present, the welded high-speed steel planer cutter body in the market is generally made of Q235 or 45 steel. The hardness of the cutter body is low and the overall strength is low. In order to improve the overall strength, the method of increasing the thickness of the cutter body or the thickness of the high-speed steel insert is generally used. The integral high-speed steel planer is directly adopted, which is expensive. Therefore, the current production method of high-speed steel planers is generally to use the method of inserting high-speed steel to inlay high-speed steel on other metal materials with high hardness and low price, which can reduce the amount of high-speed steel and reduce the processing cost of the planer. The strength of the planer. [0003] In the p...

AI Technical Summary

Problems solved by technology

45 steel has better strength and toughness after quenching and tempering, and is suitable for use as a cutter body. However, since the brazing and heat treatment temperature of high-speed steel is 1250 ° C, the quenching temperature of 45 steel is 850 ° C, and due to the large difference in hardenability, the tool body part The hardness cannot be obtained through air cooling, so it is impossible to carry out a unified heat treatment process for high-speed steel and 45 steel. If the cutter body is pre-conditioned, the high temperature during brazing will completely destroy the quenched and tempered structure of the cutter body

The above three situations will lead to a reduction in the quality of the cutter body, resulting in unstable welding between the cutter body and the insert high-speed steel, and a reduction in the quality of the entire planer