CAJ | 학술논문

针对现场生产的430不锈钢冷轧板,通过高温连续退火实验研究了退火温度对材料显微组织、强度、塑性以及各向异性性能的影响.通过实验得到了合理的两段式加热连续退火工艺：选取中间温度为600℃,加热II段的加热速率为2.3℃·s-1,最高加热温度为840℃.随着退火温度的升高,薄板的屈服强度和硬度呈明显的两阶段降低趋势,延伸率呈“S”型趋势增加,平均塑性应变比基本保持不变(1.25左右),而轧制平面各向异性指数有一定的降低.针对430不锈钢冷轧板分别建立了屈服强度与退火软化率和延伸率之间的定量关系.
침대현장생산적430불수강랭알판,통과고온련속퇴화실험연구료퇴화온도대재료현미조직、강도、소성이급각향이성성능적영향.통과실험득도료합리적량단식가열련속퇴화공예：선취중간온도위600℃,가열II단적가열속솔위2.3℃·s-1,최고가열온도위840℃.수착퇴화온도적승고,박판적굴복강도화경도정명현적량계단강저추세,연신솔정“S”형추세증가,평균소성응변비기본보지불변(1.25좌우),이알제평면각향이성지수유일정적강저.침대430불수강랭알판분별건립료굴복강도여퇴화연화솔화연신솔지간적정량관계.
The effects of annealing temperature on the microstructure, strength, elongation and anisotropy properties of cold-rolled 430 stainless steel were studied by continuous annealing experiment. An available double-heating section annealing process is obtained for the cold-rolled steel as the following:the intermediate and the maximum annealing temperature are 600 and 840℃, respectively, and the heating rate of the second heating section is maintained at 2. 3℃·s-1 . As continuous annealing proceeds, the mechanical properties of the strip have great changes: when the annealing temperature rises, the yield strength and hardness decrease by a two-stage trend, the elongation sigmoidally increases, the mean Lankford value remains at a level of approximately 1. 25, and the variation of Lankford value on the rolling plane has apparent decrease. Quantitative relationships between yield strength and softening fraction and between yield strength and elongation are determined for the cold-rolled steel.