在55SiCr弹簧钢丝的生产过程中，经喷丸除锈和拉拔后，钢丝表面出现结疤现象，通过形貌观察、化学成分分析、显微组织观察、显微硬度测试等方法对结疤原因进行了分析。结果表明：弹簧钢丝表面结疤是在喷丸除锈过程中形成的；铸钢丸在长期使用过程中产生棱角并发生加工硬化，导致其韧性降低、脆性增加，易开裂而产生残余颗粒；在喷丸除锈过程中，铸钢丸残余颗粒易嵌入钢丝基体中，在后续拉拔过程中在钢丝表面留下划痕并发生变形而形成块状结疤。

During production of 55SiCr spring steel wire, the surface of the steel wire was scarred after shot peening and drawing. The reasons for scarring were analyzed by morphology observation, chemical composition analysis, microstructure observation and microhardness test. The results show that the surface scabs were formed during shot peening. During the long-term service, cast steel shots appeared angular and work hardening resulting in the reduction of toughness and increase of brittleness; cast steel shots were easy to crack, and then residual particles formed. During shot peening, residual particles of cast steel shot tended to be embed in the matrix of steel wire, leading to the surface scratches and deformation to form massive scarring on surface of steel wire during following drawing process.