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利用拉伸试验机和纳米力学探针对一种无Si含P连续退火TRIP钢的力学性能和铁素体微区力学性能进行了研究.宏观拉伸实验结果表明,无Si含P系TRIP钢拥有良好的力学性能,其屈服强度高达550 600 MPa,抗拉强度在740 MPa以上,断后延伸率均在25%以上.利用纳米力学探针对铁素体微区力学性能进行测试的结果表明,无Si含P系TRIP钢铁素体纳米硬度值比中Si系TRIP钢纳米硬度值高约0.6 GPa,由此引起的屈服强度差异约为75 MPa,抗拉强度差异约为80 MPa.
Tensile testing machine and nano-mechanical probe were used to study the mechanical properties and the mechanical properties of a ferritic stainless steel without Si-containing P-continuous annealing TRIP steel.The results of macro-stretching experiments show that the Si-free P-containing TRIP steel With good mechanical properties, the yield strength is as high as 550 600 MPa, the tensile strength is above 740 MPa, and the elongation after break is above 25% .The results of the mechanical properties test of ferrite microstructure by nanomechanical probe show that, The Si-P-containing TRIP steel has a nano-hardness of about 0.6 GPa higher than that of the Si-based TRIP steel, resulting in a yield strength difference of about 75 MPa and a tensile strength difference of about 80 MPa.