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钢在加热或冷却时的组织转变温度即临界点在实际生产过程中是非常重要的,对锻造、热处理以及组织和性能均具有很重要的意义,是生产过程中必须考虑的参数之一。但有的文献资料所标的临界点实在使人难以理解,因而有纠正的必要。据《大型铸锻件》杂志1979年第1期中《60万千瓦汽轮发电机转子热处理》一文中记载:“在我厂冶炼条件下所测26Cr2Ni4MoV钢的临界点为A_1=753℃,A_()3=799℃,
The critical point of the microstructure transformation temperature of steel during heating or cooling is very important in the actual production process. It is of great importance to the forging, heat treatment, microstructure and properties. It is one of the parameters that must be considered in the production process. However, some of the critical points marked in the literature are really difficult to understand and therefore necessary for rectification. According to “Large Castings and Forgings” magazine in 1979 No. 1 “600,000 kilowatts turbine rotor heat treatment,” a paper reads: "Measured in our plant under the conditions of 26Cr2Ni4MoV steel critical point A_1 = 753 ℃, A_ () 3 = 799 ° C,