会议专题

Study On Process And Properties For High Strength Steel With Application Of Gleeble 1500 Heat Simulater

The phase transformation rule, microstructures and properties of JG590 high strength steel produced in Jinan Iron and Steel Co. ltd. Have been investigated in this paper. When the chemical composition of steel are given, the cooling rates after finished rolling affect on the properties of steel greatly. The yield strength and tensile strength increasing, the elongation and reduction of area decreasing as increasing of cooling rates after rolling. The main cause is due to appearance and increasing of Bainite and Martensite other than Ferrite and Pearlite in room temperature. The finished rolling temperature have distinct effects upon the mechanical properties of steel plates. Finished rolling at different temperature with the 0.5℃/s cooling rate, the tensile strength vary in 599-698MPa, the yield strength changed from 412 Mpa to 536MPa. The elongation is between 30.4-40.5%. But when finished rolling at different temperature with the 2.0℃/s cooling rate, the tensile strength vary in 747-784MPa, the yield strength changed from 441 Mpa to 601MPa. The strength index can both meet the requirements of employ. But the elongation is only 18.7-24.5%. This is related with production of lots of Bainite microstructure more than 2℃/s cooling rate. In the procedure of manufacture of JG590 high steel, the quickly cooling rate should be avoided to keep suitable microstructure and good elongation and toughness.

phase transformation high strength controlled cooling microstructure

Feng Yong

Technology Center of Jinan Iron and Steel Co., Ltd.P.R.China

国际会议

The Fifth International Conference on Physical and Numerical Simulation of Materials Processing(第五届材料与热加工物理模拟及数值模拟国际会议)

郑州

英文

2007-10-23(万方平台首次上网日期,不代表论文的发表时间)