主要针对 G115 马氏体耐热钢弯管、锻件和铸件的生产制造工艺和性能控制进行了研究；主要解决了 G115 冶炼工艺优化，成分精确控制，大型铸件的浇注及热处理工艺，大型锻件的加热、锻造及热处理工艺、大口径管的挤压及热处理工艺、大型弯管弯曲工艺和热处理工艺、转炉的冶炼工艺模拟研究等；成功试制出 5 吨级G115 弯管、锻件和铸件各一件，完成热处理和性能检测，对转炉冶炼 G115 的工艺进行了研究。成果将应用于 630℃及以上参数的先进超超临界火电机组，高参数的电站建设，可以降低燃煤消耗，降低污水和废气的排放，有利于节能环保。

The manufacturing process and performance control of G115 martensitic heat-resistant steel elbow, forging and casting were studied; It mainly solved the optimization of G115 smelting process, accurate control of composition, pouring and heat treatment process of large castings, heating, forging and heat treatment process of large forgings, extrusion and heat treatment process of large diameter pipe, bending process and heat treatment process of large elbow, simulation research of converter smelting process, etc; One 5-ton G115 elbow, one forging and one casting were successfully trial produced. The heat treatment and performance test were completed. The smelting process of G115 in converter was studied. The results will be applied to advanced ultra supercritical thermal power units with 630 ℃ and above parameters, and high parameter power station construction, which can reduce coal consumption, sewage and waste gas emissions, and is conducive to energy conservation and environmental protection.