TM210A钢冶炼工艺对其组织和性能的影响

针对TM210A马氏体时效钢在生产过程中出现的组织和性能不能满足标准要求的实际情况,研究了钢的化学成分、真空自耗重熔速度对TM210A钢棒材的低倍组织和力学性能的影响,在透射电镜下观察了固溶态和时效态的显微组织.结果表明,强化元素含量的合理控制能提高棒材的强度,适当的真空自耗重熔速度能有效改善棒材低倍组织,提高棒材强度.在此基础上确立了该钢的冶炼工艺.

Effects of Smelting Process on Microstructure and Properties of TM210A Steels

Because of practical condition that the microstructure and properties of the TM210A maraging steel didn’t meet the requirements from the standard, the effects of chemical composition and the remelting rates in vacuum consumable electrode on the macrostructure and the mechanical properties of the TM210A steel bars were investigated. The microstructures of the steel bars after solid solution and aging treatments were observed by transmission electron microscopy (TEM). The experimental results showed that the reasonable control of the contents of the strengthening elements increased the strength of the bar, and the appropriate remelting rate in vacuum consumable electrode also effectively improved the macrostructure quality and the strength of the bar. The smelting processes of the steels were established according to the above results.