50 mm 厚700 MPa 级别低碳贝氏体钢板 AH70DB 的开发

摘要

通过添加不同的微合金元素，结合 TMCP +回火工艺，试验了3种不同成分体系的低碳贝氏体钢板 AH70DB，研究了在相同轧制工艺和热处理条件下成分对组织及性能的影响，最终成功开发出50 mm 厚度700 MPa 级别 AH70DB 低碳贝氏体钢板产品。%By adding different microalloying elements,combining with TMCP and tempering process,Angang conducts tests on low carbon bainitic steel plate AH70DB with three component systems,studies the effects of chemical composition on microstructure and mechanical properties of the steel plate with the same rolling and heat treatment process,and successfully develops 50mm thickness 700MPa grade low carbon bainitic steel plate.