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研究了奥氏体不锈钢板(0Cr18Ni9)在加工制备过程中的磁性变化规律。结果表明,合金的饱和磁化强度Ms与材料中磁性相含量有关。铸态合金存在残存的高温铁素体相而呈现一定磁性,饱和磁化强度Ms达35.8 k A/m。随着加工进行,主要是经历各道加热工序时,合金的Ms逐渐减弱。最终固溶态下合金的Ms已经降低为1.4 k A/m。锻态合金在单相奥氏体温度区内的退火处理可以有效减少合金中残存的高温铁素体并使饱和磁化强度降低,可作为控制磁性的有效措施。
The magnetic change regularity of austenitic stainless steel (0Cr18Ni9) in the process of preparation was studied. The results show that the saturation magnetization Ms of the alloy is related to the content of magnetic phase in the material. The as-cast alloy has some residual high-temperature ferrite phase and shows a certain degree of magnetism. The saturation magnetization Ms reaches 35.8 kA / m. With the processing, mainly through the various heating process, Ms alloy gradually weakened. The Ms in the final solid solution state has been reduced to 1.4 k A / m. Annealing treatment of the forged alloy in the single-phase austenite temperature zone can effectively reduce the residual high-temperature ferrite in the alloy and reduce the saturation magnetization, which can be taken as an effective measure to control the magnetism.