Influence of heating system on grain size of nitrogen micro-alloyed HRB500E billet
The influence of heating system on the average grain size of austenite of nitrogen microalloyed HRB500E billet was studied under the condition of the heating temperature of 1 080-1 250 ℃ and the soaking time of 5-30 min.The results showed that the austenite grain size of the experimental billet samples increased with rising of the heating temperature and prolonging of the soaking time under the experimental conditions.When controlling the soaking time in 15-25 min and the heating temperature in 1 080-1 200 ℃,the growth rate of austenite grain was slower and the average grain size was relatively small and homogeneous.The relationship model between the heating temperature of the billet and the original austenite grain size was obtained by fitting the experiment data.
NETL
NSTL
万方数据
维普
