Aging treatment method for accurate die-cast cylinder body of auto air-condition compressor

Abstract

The invention discloses an aging treatment method for an accurate die-cast cylinder body of an auto air-condition compressor. The aging treatment method comprises the following steps of 1 solution hardening, wherein the compressor cylinder body formed through accurate die casting is subjected to solution hardening; 2 natural aging treatment, wherein the hardened compressor cylinder body stands for 2-26 hours at the room temperature; and 3 artificial aging treatment, wherein the compressor cylinder body subjected to natural aging treatment is put into a box type furnace with the temperature ranging from 175 DEG C to 215 DEG C for heat preservation for 3-9 hours. By means of the aging treatment method, the cylinder body is high in hardness, and the work efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of metal thermal processing technology, in particular to a precision die-casting method for aging treatment of a cylinder body of an automobile air-conditioning compressor with high cylinder body hardness and high working efficiency. Background technique [0002] With the rapid development of the automobile industry, in order to save energy and reduce pollution, automobiles are becoming lighter and lighter. Compared with steel materials for automobiles, aluminum alloy has a series of excellent properties such as low density, high specific strength and specific stiffness, good elasticity, good impact resistance, high recycling rate and regeneration rate, and more and more abundant alloy properties. feature. Therefore, using a large number of lightweight materials to replace the most used steel materials is an effective way to solve the problem of automobile lightweight. In today's automobile manufacturing i...

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Problems solved by technology

In the subsequent heat treatment process, the gas will be heated and expanded, which will cause deformation of the casting in severe cases. Therefore, ADC12 aluminum alloy cannot be strengthened by general solution treatment.

[0004] The existing problems are: the hardness of the cylinder body is not enough, and the work efficiency is low

The reason is: the hardness can be improved by natural aging alone, but the improvement is limited and time-consuming, and the productivity is low; artificial aging alone, due to the premature precipitation of the transition phase, leads to unsatisfactory aging effect

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