Simulation of hot-rolled dual-phase weathering steel 09CuPCrNi

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• 作者：Chunling Zhang ; Dayong Cai ; Tianchen Zhao ; Yunchang Fan and Bo Liao
• 刊名：Materials Characterization
• 出版年：2005
• 出版时间：2005
• 年：2005
• 卷：55
• 期：4-5
• 页码：378-382
• 全文大小：351 K

文摘

The continuous cooling transformation diagram of deformed austenite for steel 09CuPCrNi was constructed by means of a combined method of dilatometry and metallography. The diagram exhibits an elongated polygonal ferrite C-curve with a delayed pearlite start and a metastable austenite gap between the polygonal ferrite and pearlite regions and between the ferrite and bainite regions. For this experimental steel, it is possible to obtain a dual-phase microstructure directly by hot rolling and appropriate cooling. Based on the diagram, the technical process of a hot-rolled dual-phase treatment was established and simulated using a thermal simulation testing machine. Dual-phase microstructures were obtained that show some bainite phase and are characterized by an irregular distribution of island-shaped martensite in a matrix of equiaxed ferrite grains. The morphology of the martensite phase is essentially of the lath type, with small areas of micro-twins appearing.