CAJ | 학술논문

对Ti+Nb+B复合处理超低碳高强度BH钢的热轧、冷轧和连续退火进行实验.结果表明:试制的超低碳高强度BH钢退火板的屈强比为0.536,烘烤硬化值为44MPa,具有较为优良的成形性能和烘烤硬化性能,抗拉强度为394MPa,达到了390MPa级超低碳高强度BH钢板的强度要求.物理化学相分析表明:添加在超低碳高强度BH钢中的B除了析出了2mg/kg的BN,大部分的B在钢中以间隙固溶的形式存在,对超低碳高强度BH钢基体起到了固溶强化的作用.
대Ti+Nb+B복합처리초저탄고강도BH강적열알、랭알화련속퇴화진행실험.결과표명:시제적초저탄고강도BH강퇴화판적굴강비위0.536,홍고경화치위44MPa,구유교위우량적성형성능화홍고경화성능,항랍강도위394MPa,체도료390MPa급초저탄고강도BH강판적강도요구.물이화학상분석표명:첨가재초저탄고강도BH강중적B제료석출료2mg/kg적BN,대부분적B재강중이간극고용적형식존재,대초저탄고강도BH강기체기도료고용강화적작용.
Hot rolling, cold rolling and continuous annealing of Ti+Nb+B bearing high strength ultra-low carbon bake hardening steel were studied.The results show that the developed high strength ultra-low carbon bake hardening steel possesses superior formability and excellent bake hardenability.The ratio of the yield strength to tensile strength is 0.536.The bake hardening value is 44MPa.The tensile strength of the developed steel is 394MPa, which meets the requirements of the 390MPa grade high strength ultra-low carbon bake hardening steel.It has been shown from the results of physicochemical phase analysis that most of the alloying element B in the high strength ultra-low carbon bake hardening steel exists in the form of interstitial solid solution and plays a role in the solid solution strengthening besides 2mg/kg BN precipitation.