Abstract
The influence of hot strip coiling temperature on microstructural characteristics, mechanical properties and hydrogen permeation behaviour of boron containing enamel steel was investigated. The material was produced and processed in laboratory. It is found that with the increasing hot strip coiling temperature, strength of annealed steel sheet reduced, the rm value increased, high temperature coiling (720°C) was more suitable for cold working performance. Supported by subsequent heavy reduction cold rolling and rapid continuous annealing, a large number of dispersed cementite particles within grains were obtained, the hydrogen diffusions (DL) in annealed sheets of hot strips coiled at temperatures used in present work were extremely slow and far less than the critical value, and the fish scale resistance of the tested enamel steel is excellent. With the effect of degenerated pearlite chains, DL can be reduced by about 30% in the annealed sheet form hot strips with the increasing coiling temperature form 630°C to 720°C. Hot strip coiling at high temperature is more suitable for enamel use.
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