two-phase ferritic-martensitic steel;
alloying;
microalloying;
effect of hot rolling;
temperature at the end of hot rolling;
coiling temperature;
cold-rolled product heat treatment;
continuous hot galvanizing unit;
annealing temperature;
strip tension;
D O I:
10.1007/s11015-017-0388-x
中图分类号:
TF [冶金工业];
学科分类号:
0806 ;
摘要:
Results are given for a study of the effect of hot rolling parameters on the mechanical properties of heat-treated cold-rolled product of two-phase ferritic-martensitic steel (TFMS) of grade HCT980X (EN10336:2007). Temperatures for the end of rolling and coiling are varied during hot rolling of a metal laboratory melt. Hot-rolled product obtained by different versions is heat treated by regimes modeling annealing in a continuous hot galvanizing unit (CHGU). Morphological features of structural components and excess phase precipitates in different treatment stages are studied. The effect of strip tension in a CGHU on a set of mechanical properties with a change in temperature is analyzed. Mechanical test results are used to determine the optimum heat treatment temperature range providing the required level of cold-rolled steel strength properties.