surface defect of billet 钢坯表面缺陷
surface cleaning of billet 钢坯表面清理
Surface quality control of billet 锭坯表面质量控制
Extruding velocity, temperature of billet and container, die roughness and the chemical composition of the billet are the major factors which affect the surface quality of the extruded product.
挤压速度、挤压毛坯的温度、型腔温度、模具的表面粗糙度以及挤压毛坯的化学成分是影响热挤压件表面质量的主要因素。
Types of and causes for the surface defects of the CC round billet for pipe - rolling with mandrel mill are analyzed, and quality improvement measures proposed.
简要分析了连铸连轧圆管坯表面缺陷的类别和形成原因，提出了改进圆管坯质量的措施。
The formation of billet internal cracks, surface cracks, the dark belly and centres segregation defects has close ties with cooling.
连铸坯内部裂纹、表面裂纹、鼓肚和中心偏析等缺陷的形成都与冷却有着紧密的联系。
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