工程机械用低合金高强度钢的实验室试制

Laboratory Trial-produce of Low Alloy High Strength Steel for Engineering Machinery

通过实验室模拟控制轧制及不同的冷却工艺,成功试制了具有良好综合力学性能的工程机械用低合金高强度钢,并研究了在不同工艺下的组织和性能。结果表明:试验钢采用两阶段控制轧制和直接淬火+低温回火工艺生产的钢板强度最高,其抗拉强度为1838MPa、屈服强度为1531MPa;采用层流冷却+等温碳分配+低温回火冷却工艺生产的钢板韧性最高,室温及-40℃冲击功分别为48、32J。

A low alloy high strength steel with good comprehensive mechanical properties of engineering machinery was experimented successfully by the laboratory simulation of controlled rolling and different cooling processes, and microstructure and properties under different processes were investigated. The results show that： the test steel has the maximum strength by two stages of controlled rolling, direct quenching and low temperature tempering technology, its tensile strength is 1838MPa and yield strength is 1531 MPa; it has the highest toughness by the laminar cooling and isothermal carbon allocation and low temperature tempering technology, and its impacting energies at room temperature and -40℃ are respectively 48J, 32J.