Microstructure and properties of Ti-bearing hot-rolled high-strength steel plates for two-sided enameling

摘要

The composition and production technology of the type of hot-rolled steel plate used in two-sided enameling were briefly described.The microstructure and mechanical properties before and after enameling were contrastively investigated,and the precipitates in the samples were analyzed using transmission electron microscope and energy dispersive spectrometer.The results show the ferrite grain size of the steel plate after high-temperature enamel firing to be fine,with a large number of TiC and Ti4C2S2 precipitates dispersed throughout the ferdte matrix.After two rounds of enamel firing at a temperature range of 800-890 ℃,its yield strength can still reach 342 MPa.The results of a hydrogen permeation test show that the hydrogen storage properties of the steel plate are much better than those of ordinary structural carbon steel.A better bubble structure in the enamel layer can be obtained by this steel plate,with no fish-scale defects on the enameled steel-plate surface.