摘要
在加热过程中由于发生逆共析反应产生相变收缩效应,45号钢的线膨胀系数发生突变,由此得到相变临界温度.利用热膨胀法测量45号钢的线膨胀系数随温度的变化,升温速率为3~5℃/min,测得A C1点为737℃,A C3点为827℃,实验值与理论值吻合.
The linear expansion coefficient of 45 steel changed suddenly because of phase transition shrinkage effect caused by the reverse eutectoid reaction,thus the critical temperature was obtained.According to the thermal expansion method,the A C1 point of 45 steel was 737℃,the A C3 point was 827℃,the heading rate was 3~5℃/min,the experimental value was consistent with the theoretical one.
作者
伍逸凡
常凯歌
冯雪红
郭永利
张沛
WU Yi-fan;CHANG Kai-ge;FENG Xue-hong;GUO Yong-li;ZHANG Pei(National Demonstration Center for Experimental College Physics Education,School of Physics,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《物理实验》
2020年第9期6-9,共4页
Physics Experimentation
关键词
相变临界温度
线膨胀系数
逆共析反应
critical temperature
linear expansion coefficient
reverse eutectoid reaction