Operation method: after heating the steel parts to AC3 + 30 ~ 50c or AC1 + 30 ~ 50c or below AC1 (relevant materials can be consulted), they usually cool down slowly with the furnace temperature.
Intention:
Reduce hardness, improve plasticity, improve machining and pressure machining functions;
Refine the grain, improve the mechanical function, and prepare for the next process;
Eliminate the internal stress caused by cold and hot working.
The key points of application: (1) suitable for forgings, weldments and raw materials with unqualified supply conditions of alloy layout steel, carbon East West steel, alloy East West steel and high-speed steel; (2) usually annealed in the blank condition.
On 2018-08-08 11:45:46
