The austenitizing temperature should be determined according to the Cr content and thickness of the casting, and the holding time should be calculated according to the modulus of the casting.

• 奥氏体化温度根据含铬量和铸件壁厚决定,保温时间根据铸件模数计算。决定加热升温速度应考虑铸件的结构、壁厚、铸态组织和炉内不同部位的温度差等因素。