化工设备所用材料,需要具备抗腐蚀性、抗氧化性和耐热性等。为适应用户需要,我厂生产了奥氏体球墨铸铁铸件。一、化学成分与组织我厂生产的奥氏体球铁是参照西德、美、英等国的标准,规定厂标(简称为NiCr20—2)成分(％)为C3.0,Si1.0～2.8,Mn0.7～1.5,Ni Chemical equipment used in materials, you need to have corrosion resistance, oxidation resistance and heat resistance. In order to meet user needs, I plant the production of austenitic ductile iron castings. First, the chemical composition and organization Our production of austenitic ductile iron is the reference to West Germany, the United States, Britain and other countries standards, the provisions of the factory standard (referred to as NiCr20-2) composition (%) of C3.0, Si1.0 ~ 2.8, Mn 0.7 ~ 1.5, Ni