利用自主设计的拉矫机对热轧带钢施加不同的压下量或张紧力进行拉矫破鳞试验, 使试验钢表面获得不同的应力状态, 观察了破鳞前后氧化皮/基体的界面形貌; 采用拉伸试验研究了不同应力状态下氧化皮/基体界面的结合强度; 采用电位导数首零方法对试验钢进行酸洗试验, 研究了应力状态对酸洗速率的影响。结果表明: 不论是拉应力还是压应力, 随着应力值的增大, 氧化皮的全剥落率不断增大, 且压应力时的全剥落效果好于拉应力时的, 最终受压应力面和受拉应力面氧化皮的全剥落率稳定值分别为24.1%和6.3%; 当全剥落率相同或相近时, 拉应力对氧化皮/基体结合强度的降低效果和对酸洗速率的提升效果都好于压应力的; 当压下量相同或相近时, 压应力对酸洗速率的提升效果好于拉应力的。

In order to obtain different stress states, the self designed descaling tension leveler was applied to conduct scale breaking test on hot-rolled steel strip at different reductions or tension forces. The interface morphology of oxide scale/substrate before and after descaling were observed, and tensile test was used to study bonding strength of oxide scale/substrate interface in different stress states. The pickling test was carried out to study the effect of stress state on pickling rate with first zero potential differential value method. The results show that complete spalling rate of oxide scale increased with the increase of the tensile stress and compressive stress values. The compressive stress had a stronger effect than the tensile stress on complete spallation rate. The stable values of oxide scale full spalling rate at compressive stress and tensile stress were approximately 24.1% and 6.3%. The tensile stress had a stronger effect than compressive stress on decreasing oxide scale/substrate bonding strength and increasing pickling time when the full spalling rate values were same or close. The compressive stress had a stronger effect than the tensile stress on decreasing pickling time when reduction values were same or close.