碳化物颗粒度对铁碳合金脆性断裂开始的影响

• 作 者: 王芳伶
• 出 处: 钢铁研究情报
• 发表日期: 1973年02期
• 关键词: 碳化物颗粒 铁碳合金 脆性断裂 铁基合金 碳化物分布 合金系 微小裂缝 水淬 抗张性能 淬火时效

将含碳0.02％的铁基合金用来研究碳化物颗粒度对铁碳合金脆性断裂开始的影响。由于铁素体颗粒的大小和碳化物颗粒的大小能各自控制,因而此类合金系特别方便。在1200℃退火1小时得到铁素体颗粒。加热到720℃碳化物就分解,随后在指定温度下水淬和退火得到所需范围的碳化物颗粒(参看图1)。图2示出在-196℃三种条件下碳化物

Iron-based alloys containing 0.02% carbon were used to investigate the effect of carbide particle size on the onset of brittle fracture in iron-carbon alloys. Due to the size of the ferrite particles and the size of the carbide particles can be controlled, so the alloy system is particularly convenient. Annealed at 1200 ° C for 1 hour to obtain ferrite particles. The carbides are decomposed by heating to 720 ° C, followed by water quenching and annealing at the specified temperature to obtain the desired range of carbide particles (see Fig. 1). Figure 2 shows the carbide under three conditions at -196 ° C