摘要
高碳钢SWRH82B（0.81％C）盘条用于生产预应力钢丝钢绞线,其中网状碳化物是造成冷拔断裂的重要原因.试验了该钢150 mm×150 mm铸坯堆垛缓冷时间（0～48 h）对铸坯碳偏析和Φ12.5 mm盘条碳化物的影响.结果表明,直接空冷时的铸坯中碳含量的差值为0.116％,堆垛缓冷12,24,36,48 h后碳含量差值分别降至0.088％,0.080％,0.075％和0.076％,盘条中网状碳化物也相应降低;SWRH82B钢150 mm× 150 mm连铸坯堆垛缓冷24h,可以满足盘条冷拉工艺要求.
The coil of high carbon steel SWRH82B （0. 81% C） is used for pre-stressed wire strands, and the serious net carbides in steel is important factor of wire fracture during cold drawing process. The effect of 150 mm×150 mm casting billet stacking slow cooling time （0 -48 h） of steel on carbon segregation in billet and carbide segregation in φ12. 5 mm coil is tested. Results show that the deviation of carbon content in billet with direct air cooling is 0. 116% , after stacking slow cooling of billet for 12, 24, 36 and 48 h, the deviation carbon content in billet respectively decreases to 0. 088% , 0. 080%, 0. 075% and 0. 076%, and the rating of net carbide in coil is also corresponding decreased; it is available to meet the requirement for cold drawing process by stacking slow cooling for 24 h of steel SWRH82B 150 mm × 150 mm cast- ing billet.
出处
《特殊钢》
北大核心
2014年第3期39-41,共3页
Special Steel
