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1.张作梅和黎俊结同志所作“横锻及横轧时金属的变形与破裂的研究”一文报道的工作,试图进一步解决横轧及料轧过程中金属的变形与中心破裂问题。根据问题的发展经过与争论焦点,可认为如果用横锻实验来证明横轧下金属破裂前中心部分究竟是否发生塑性变形,问题的关键在于设法表明:在横锻时,微小压缩量能否使坯料中心发生塑性变形。张、黎进行了这方面的工作,是值得重视的。不过,从他们的结果看,尚有若干问题值得商榷。譬如,多次压缩旋转横锻的实验结果是:“当压缩率为0.7%时,各变形指标都是在外层最大,沿着中心的方向变形逐渐减少,在坯料中心区变形最
1. The work reported by Zhang Zuo-mei and Li Jun-jie in the study of “deformation and rupture of metal during transverse and transverse rolling” attempts to further solve the problem of metal deformation and center rupture in the cross-rolling and material-rolling processes. According to the development of the issue after the focus of the debate, it can be considered if the transverse forging test to prove that the central part of the metal rolling before rolling whether the occurrence of plastic deformation, the problem lies in trying to show that: the amount of micro-forging can make the amount of compression Blank center plastic deformation occurs. Zhang and Li conducted this work worth paying attention to. However, judging from their results, there are still some issues that are debatable. For example, the experimental results of multiple compression rotary forging are as follows: "When the compression rate is 0.7%, the deformation index is the largest in the outer layer, along the center of the deformation gradually decreases in the blank center deformation