摘要
不锈钢铸坯内部质量直接影响着最终产品的表面质量和力学性能。对316L奥氏体不锈钢板坯中金相组织和夹杂物进行了检测分析。结果表明:316L不锈钢铸坯的表层残留铁素体呈骨骼状分布,角部晶粒细小;铸坯中心残留铁素体相比较分散,呈条状或不连续骨架形式分布;铸坯三角区铁素体含量最高为15.17%,明显高于其他部位;铸坯中夹杂物都呈现为球状,类型为A12O3-MgO-CaO-SiO2;三角区5～10μm的夹杂物数量多,心部试样以0～5μm的夹杂物为主。
The internal quality of stainless steel slab is an important factor that influences surface quality and mechanical properties of cold rolled products. A comparison analysis was made on the microstructure and inclusions of 316L austenitic stainless steel slab. The results show that the morphology of residual ferrite in the surface layer is skeletal, the comer specimen have small grain. The morphology of residual ferrite in the center is striation or discontinuous skeletal shape, distributing dispersedly. The ferrite amount of the triangle area is significantly higher than the other parts of the slab up to 15.17%. The spherical A 1203-MgO-CaO-SiO2 inclusion is the main inclusion in the 316L austenitic stainless steel slab. The triangle area have more 5-10 μm inclusions than other parts of the slab, and the inclusion size of the core section is mostly 0-5 μm.
出处
《铸造》
CAS
CSCD
北大核心
2013年第3期199-202,共4页
Foundry
