By changing heating temperature and holding time, the austenite grain growth behavior of a low carbon steel under different heating conditions was studied.
通过改变均热温度和保温时间，研究低碳钢的奥氏体平均晶粒尺寸与时间的关系，及奥氏体晶粒各尺寸范围的分布规律。
The effects of the aging temperature and holding time on the microstructure and hardness of the ultra-low-carbon steel bearing copper were investigated.
研究了时效温度和保温时间对时效硬化型超低碳含铜钢的显微组织和硬度的影响。
With increasing of the holding time at high temperature, wear rate decreasing of low C-hi cr cast iron became more obvious, and wear resistance increased.
随着高温保温时间的延长，低碳高铬铸铁的磨损率降低幅度较大，耐磨性能提高。
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