采用扫描电镜和能谱仪对低碳冷镦用高速线材表面缺陷进行了分析，同时对轧制中间料的缺陷和成品冷镦标准件开裂样品进行对照分析。
In this paper, typical surface defects of low carbon steel high speed wires for cold-heading have been examined by using SEM and EDS.
研究成品成分与高碳钢线材力学性能的关系，得出回归方程。
The relation between composition and mechanical properties of high carbon steel wire rod is analyzed, and the regression equation is obtained.
通过分析，指出在生产B级棉花打包钢丝时，关键是线材的化学成分均匀。化学成分对钢的内部组织、性能及成品质量起决定作用。
Through the analysis, pointed out the key is the wire rod chemical composition is even when produces the B-grade steel wire for cotton packaging.
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