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采用热轧、冷轧及退火处理等工艺,对成分为25Mn-3Si-3Al的TWIP钢进行了试制,研究了钢板的力学性能、微观组织及其断裂机制,并采用X射线测定了钢板的晶体学织构.实验结果表明钢板拉伸时发生典型的延性断裂;拉伸前的组织为伴有大量退火孪晶的奥氏体;在拉伸过程中退火孪晶转变成形变孪晶,使产品的强度和塑性提高;退火过程中形成的织构组分有利于塑性变形.
The mechanical properties, microstructure and fracture mechanism of TWIP steel with 25Mn-3Si-3Al were studied by hot rolling, cold rolling and annealing treatment. The crystal of the steel was measured by X-ray The results show that the typical ductile fracture occurred during the drawing of the steel sheet, the pre-tensile structure is austenite with a large amount of annealed twins, and the annealing twins transform into the deformed twins during the stretching process, The strength and plasticity increase; the texture components formed during the annealing process are conducive to plastic deformation.