Influence of tensile test parameters on test results of tinplate yield strength

By means of tensile test,hardness testing and scanning electron microscope observation,the effects of sampling direction,parallel length,baking temperature and baking time on the yield strength,microstructure and hardness of MR T-3 BA and MR T-4 CA tinplates were analyzed.The results showed that the sampling direction had a great influence on the yield strength of the two tinplates.The yield strength of the MR T-3 BA tinplate in the 0°direction was higher than that in the 90°and 45°directions,and the yield strength of the MR T-4 CA tinplate in the 90°direction was higher than that in the 0°and 45°directions.Under the condition of different parallel lengths,the yield strength of the two tinplates had no significant difference.With the increase of baking temperature,both the yield strength and hardness of MR T-3 BA tinplate showed an upward trend,and the grains became finer,while the yield strength of MR T-4 CA tinplate decreased slightly,and its hardness and microstructure did not change significantly.The baking time had little effect on the yield strength,hardness and microstructure of the two tinplates.