论文部分内容阅读
研究了0.21C--1.43Si--1.35Mn钢在两相区及完全奥氏体区采用Q&P(Quenching and Partitioning)工艺加热后的微观组织与力学性能.结果表明:两相区加热可获得马氏体、残余奥氏体和铁素体组织,钢的抗拉强度为1 013 MPa,延伸率为25%,强塑积为25 655 MPa.%;完全奥氏体区加热可获得马氏体和残余奥氏体组织,钢的抗拉强度为1 257 MPa,延伸率为17%,强塑积为21 454 MPa.%;Q&P钢中的马氏体主要为板条状,伴有大量位错,并且发现有少量孪晶马氏体,分析认为由配分过程后的淬火过程转变而来;通过Q&P工艺可得到体积分数高达10.67%的残余奥氏体,分布在板条马氏体间,呈薄膜状.
The microstructures and mechanical properties of 0.21C - 1.43Si - 1.35Mn steel after heating in two - phase and fully austenitic regions by Q & P (Quenching and Partitioning) process were studied. The results show that heating Austenite and ferrite. The tensile strength of steel is 1 013 MPa, the elongation is 25% and the strong plastic product is 25 655 MPa%. The complete austenite zone can be obtained by heating the martensite And retained austenite, the tensile strength of steel is 1 257 MPa, the elongation is 17% and the strong plastic product is 21 454 MPa%. The martensite in Q & P steel is mainly lath-like with a large number of bits It was found that a small amount of twinned martensite was found, which was considered as a result of the quenching process after the partitioning process. The residual austenite with a volume fraction of up to 10.67% was obtained by Q & P process and distributed in lath martensite, Thin film.