ZG12Cr9Mo1Co1NiVNbNB耐热钢材料开发应用研究

随着火电超超临界机组蒸汽参数提高到28 MPa~30 MPa/600℃/620℃，对耐热钢的性能要求进一步提高，在目前耐热钢铸件材料无法满足该参数长期运行的条件下，开发了一种含Co和B的新型耐热钢材料。利用先进的JMatPro计算软件对ZG12Cr9Mo1Co1NiVNbNB进行成分配比和组织及相的模拟，并按计算确定的成分进行试制，通过对进口试块的常规力学性能、高温瞬时拉伸、断裂力学、高温持久-蠕变性能、组织稳定性及相分析和多回火试验后常规力学等使用性能和工艺性能进行了测试、分析，研究表明ZG12Cr9Mo1Co1NiVNbNB材料可适用于620℃等级超超临界机组阀门、汽缸等高温高压部件。

Applied Research of ZG12Cr9Mo1Co1NiVNbNB Heat-resistant Steel Materials

With steam parameters of the ultra-supercritical thermal power unit increase to 28 MPa~30 MPa/600℃/620℃, perfor?mance requirements of heat-resistant steel are higher. In this condition, the current heat-resistant steel casting materials can not be long-running, and a new heat-resistant steel material containing Co and B is developed. Chemical composition , organization and phas?es of ZG12Cr9Mo1Co1NiVNbNB are calculated by the advanced computing software JMatPro. Test blocks are manufactured based on results of the JMatPro calculation. Conventional mechanical properties, high temperature tensile, fracture mechanics, high temperature lasting-creep properties, organizational stability, phase analysis and conventional mechanical after multiple tempering test are tested and analyzed. It's shown that ZG12Cr9Mo1Co1NiVNbNB material is suitable for high temperature and high pressure components of 620 ℃ultra-supercritical units such as valves and cylinders.