节镍型奥氏体不锈钢冷轧带折弯开裂原因分析及控制措施
Analysis and Control Measures of the Causes of Bending and Cracking of Nickel-Saving Austenitic Cold-Rolled Stainless Steel
摘要: 根据节镍型奥氏体不锈钢冷轧带折弯开裂样品金相图及硬度数据分析，推测退火时碳化物析出造成了钢带塑性的降低，导致折弯加工时产生裂纹。通过硬态钢带不同条件下的退火处理及拉伸实验研究了碳化物析出对冷变形后组织和硬度的影响，验证了冷轧带折弯开裂的根本原因。在原有退火工艺的基础上提高退火温度并加快风冷段冷却速度解决了钢带后续加工时的开裂问题。
Abstract:
According to the metallographic diagram and hardness data analysis of the bending and cracking samples of nickel-saving austenitic stainless steel, it is speculated that the carbide precipitation during annealing causes a decrease in the plasticity of the steel strip, resulting in cracks during bending processing. The effect of carbide precipitation on microstructure and hardness after cold deformation was studied by annealing treatment and tensile experiments under different conditions of hard steel strip, and the root cause of bending and cracking of cold rolled strip was verified. On the basis of the original annealing process, the annealing temperature is increased and the cooling rate of the air-cooled section is accelerated to solve the cracking problem of the steel belt during subsequent processing.
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