Technique for fabricating axes material in stainless steel

Abstract

A technology for manufacturing the shaft made of stainless steel includes rolling 2Cr13 stainless steel, cooling in air, slow cooling in pit, and tempering at 600-700 deg.C instead of annealing at 800-900 deg.C. Its advantages are saving energy and short period.

Description

technical field [0001] The present invention is an improvement to the heat treatment process of shaft material manufacture in steel mills. Background technique [0002] In steel mills, starting from rolling, the current main technological process is rolling, air cooling, slow cooling in pits, annealing at 800-900°C, and finally supplying the market with soft bars. After the machinery manufacturing plant buys back the soft shaft material, it needs to carry out quenching and tempering heat treatment, that is, after heating the soft shaft material to a temperature of 950-1000 °C, it is quenched in oil; then, it is heated to a temperature of 600-700 °C. Temperature for tempering. The existing heat treatment process has the following disadvantages: when the shaft material is quenched and tempered by the machinery manufacturing plant, it will consume a lot of energy to heat the soft shaft material to a high temperature of 950-1000 ° C. At the same time, because the quenching proc...

AI Technical Summary

Problems solved by technology

The existing heat treatment process has the following disadvantages: when the shaft material is quenched and tempered by the machinery manufacturing plant, it will consume a lot of energy to heat the soft shaft material to a high temperature of 950-1000 ° C. At the same time, because the quenching process is in oil Completed in one step, the thermal stress and tissue stress are concentrated together, which may easily lead to the scrapping of the shaft material