首钢大规格高强度SWRH82B盘条在用户加工过程中脆断严重，与铸坯低倍角裂和皮下裂纹及盘条网状组织有关。经调查发现季节气温差异，导致铸机结晶器和二冷冷却强度相对较强。通过调整结晶器冷却水水量、二冷水比水量、更换性能合适的保护渣、转炉采用高拉碳操作工艺配合微氮增碳剂等综合措施，产品质量基本上达到大方坯工艺同等产品的质量要求。
Shougang’s big-size and high strength SWRH82B was broken during drawed process, which had relation with broken corner, subcutaneous crack of billet and wire of micro-section cellular structure. The intensity of cooling was improved for mold and secondary cooling by seasonal temperature. The product quality can meet requirements of bloom through adjusting cooling water of mold, regulating the secondary cooling water distribution, changing suitable characteristic mold powder, adopting catch carbon of finish point with micro-nitrogen carburant in converter.
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