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在满足性能要求和少添加高价合金元素的前提下,以开发出高贮氢性能及可适应后期多元化涂搪工艺为目的,开发出一种含钛低碳冷轧搪瓷用钢。对搪瓷钢不同状态的组织和性能进行了研究,获得了第二相粒子的析出规律、涂搪前后的晶粒尺寸及析出物的变化规律及退火工艺对强度的影响规律。对钢板的氢渗透时间进行了测定,试验结果与随后的涂搪试验吻合。搪瓷用钢的室温组织为铁素体,涂搪后晶粒有一定程度的长大;钢板中弥散粗大的第二相粒子Ti4C2S2是提高钢板贮氢性能的主要因素。730℃保温5 h退火后,氢渗透时间tb大于18 min,氢扩散系数D小于0.44×10-6cm2/s;钢板与涂层具有良好的密着性,可承受110 g钢球在2 m高度自由落体的冲击。
To meet the performance requirements and add less expensive alloy elements under the premise of the development of high hydrogen storage performance and can adapt to the late diversified enamel process for the purpose of developing a low carbon steel containing titanium cold-rolled enameled steel. The microstructures and properties of enamelled steel under different states were studied. The law of precipitation of second phase particles, the variation of grain size and precipitates before and after enamelling, and the influence of annealing process on the strength were obtained. The hydrogen permeation time of the steel plate was determined, and the test results were consistent with the subsequent enamel test. Enamel steel at room temperature for the ferrite, coated enamel grain to a certain extent, grew up; plate dispersed coarse second phase particles Ti4C2S2 is to improve the hydrogen storage properties of the main factors. After annealing at 730 ℃ for 5 h, the hydrogen permeation time (tb) is longer than 18 min and the hydrogen diffusion coefficient (D) is less than 0.44 × 10-6cm2 / s. The steel plate has good adhesion with the coating and can withstand 110 g steel balls freely at 2 m The impact of falling body.