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5h退火后，氢渗透时间tb大于18min，氢扩散系数D小于0．44×10^-5cm^2／s；钢板与涂层具有良好的密着性，可承受110g钢球在2m高度自由落体的冲击。
Under the premise of meeting the performance requirements and less addition of expensive alloying elements, with the purpose of developing a high hydrogen storage properties and multi-enameling processes, a low-carbon cold-rolled titanium enamel steel was developed. The microstrueture and properties of enamel steel at different states were studied to obtain a second phase particle precipitation law, the changes of precipitates and the grain size before and after enameling, and the influence of annealing process on the strength. The hydrogen permeation time of enamel steel was determined; the results matched with the subsequent enameling test. The results are as follows： The microstructure of the experiment steel at room temperature is ferrite, and the grain size grows after enameling. The dispersion of big second phase particles Ti4 C2 S2 is one of the main factors to improve hydrogen storage proper- ties of steel. After annealing at 730℃ for 5h, the hydrogen permeation time tb more than 18min and the hydrogen diffusion coefficient D less than 0.44 × 10^-6 cm^2/s; the enamel steel have good adhesion, which can withstand 110 g steel ball in 2 m highth of free fall.
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