With the investigated subject of 82B rod, the interlamellar spacings of pearlite at different isothermal transformation temperatures and different cooling rates during continuous cooling transformation were measured, ...With the investigated subject of 82B rod, the interlamellar spacings of pearlite at different isothermal transformation temperatures and different cooling rates during continuous cooling transformation were measured, and the effect of the isothermal transformation temperature and cooling rate on the interlamellar spacing was analyzed quantitatively. Moreover, the relationship models between undercooling and interlamellar spacing were presented by data regression. The experimental results show that the relationship between undercooling and reciprocal interlamellar spacing remains linear when the undercooling is not very large, or else, the interlamellar spacing tends to be constant and the relationship will deviate from linearity.展开更多
标准YB/T169-2000规定,通过光学显微镜中明暗差异测量高碳钢组织的索氏体含量。为了分析光学显微镜中各明暗区域对应的组织结构,对铅浴退火抗拉强度为1 296 MPa的Φ0.9 mm 82A高碳钢丝试样采用显微硬度计做定点标记,使用光学显微镜和扫...标准YB/T169-2000规定,通过光学显微镜中明暗差异测量高碳钢组织的索氏体含量。为了分析光学显微镜中各明暗区域对应的组织结构,对铅浴退火抗拉强度为1 296 MPa的Φ0.9 mm 82A高碳钢丝试样采用显微硬度计做定点标记,使用光学显微镜和扫描电子显微镜进行观察,同时通过不同浸蚀方式分析明暗区域出现的原因。结果证实白亮区域和类似珠光体片层组织均为索氏体组织。局部深腐蚀导致片层假象,而白亮区域和类似珠光体出现均与垂直于拉拔方向索氏体团相关。展开更多
文摘With the investigated subject of 82B rod, the interlamellar spacings of pearlite at different isothermal transformation temperatures and different cooling rates during continuous cooling transformation were measured, and the effect of the isothermal transformation temperature and cooling rate on the interlamellar spacing was analyzed quantitatively. Moreover, the relationship models between undercooling and interlamellar spacing were presented by data regression. The experimental results show that the relationship between undercooling and reciprocal interlamellar spacing remains linear when the undercooling is not very large, or else, the interlamellar spacing tends to be constant and the relationship will deviate from linearity.
文摘标准YB/T169-2000规定,通过光学显微镜中明暗差异测量高碳钢组织的索氏体含量。为了分析光学显微镜中各明暗区域对应的组织结构,对铅浴退火抗拉强度为1 296 MPa的Φ0.9 mm 82A高碳钢丝试样采用显微硬度计做定点标记,使用光学显微镜和扫描电子显微镜进行观察,同时通过不同浸蚀方式分析明暗区域出现的原因。结果证实白亮区域和类似珠光体片层组织均为索氏体组织。局部深腐蚀导致片层假象,而白亮区域和类似珠光体出现均与垂直于拉拔方向索氏体团相关。
