Transactions of Materials and Heat Treatment

Title：Effect of coiling temperature on the microstructure performance of low alloyed high strength steel

Authors： Zhang Yanling Wang Shouzhong Jiang Guizhi

Unit： Shangqiu Polytechnic

KeyWords： coiling temperature low alloyed highstrength steel cold rolling control method

ClassificationCode：TG142.1

year,vol(issue):pagenumber：2014,39(9):119-121

Abstract：

According to different rolling procedures and two different kinds of coiling temperature 580 and 630 ℃,the rolling experiment was realized by cold rolling control method in order to study the changing regularities of microstructure and performance of the Q420 low alloyed high strength steel after rolling thermomechanical treatment. The experimental results show that the microstructure of the experimental steel is ferrite + granular bainite under the two kinds of coiling temperatures. The yield strength, hardness and tensile strength of the experimental steel decrease with the increase of the coiling temperature, while elongation increases. When the coiling temperature is 580 ℃, the microstructure of the experimental steel is relatively small and even, whose comprehensive mechanics performance is better.

Funds：

河南省自然科学基金资助项目（1110054306）

张艳玲（1968-），女，学士，副教授

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