变形对330 MPa级热轧搪瓷钢组织和储氢性能的影响

Effect of Deformation on Microstructure and Hydrogen Storage Capacity of 330 MPa Grade Hot-Rolled Enamel Steel

采用氢渗透试验对钢板的储氢性能进行表征,研究了不同拉伸变形量下330 MPa级热轧搪瓷钢的显微组织和储氢性能;并对不同变形量的拉伸试样进行搪烧,研究了搪烧前后钢的储氢性能变化。结果表明:试验钢显微组织为铁素体和少量珠光体,晶粒细小、均匀,基体中弥散分布着第二相粒子TiN,具有良好的储氢性能。随着拉伸变形量的增加,试验钢的储氢性能大幅度提升。试验钢搪烧后晶粒长大不明显,且随着拉伸变形量的增加,晶粒出现了一定程度的细化;搪烧后的储氢性能与变形量有关,变形量越大,钢的储氢性能越好。

Hydrogen storage capacity of steel plate was characterized by hydrogen permeation test.The microstructure and hydrogen storage capacity of the 330 MPa grade hot-rolled enamel steel under different amounts of deformation during tensile testing were studied.The tensile samples with different deformations were enameled and burned,and the variation in hydrogen storage capacity of the test steel before and after enameling and burning was studied.The results showed that(a)the microstructure of the test steel was ferrite and a small amount of pearlite,its grains were fine and uniform,and the second phase TiN particles were dispersed in the matrix,which had a good hydrogen storage capacity;(b)the hydrogen storage capacity of the test steel was considerably improved by increasing the amount of deformation;(c)the growth in grains of the test steel after enameling and burning was not obvious,and the grains were refined to a certain extent with the increase in tensile deformation;and(d)the hydrogen storage capacity after enameling and burning was related to the deformation,the greater the deformation,the greater the hydrogen storage capacity of the steel was.