Critical Hot Plasticity and Transverse Cracking in Continuous Slab Casting with Particular Reference to Composition
Critical Hot Plasticity and Transverse Cracking in Continuous Slab Casting with Particular Reference to Composition
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DOI：
10.2355/isijinternational1966.25.149
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发表时间：
1985
影响因子：
1.8
通讯作者：
N. Hannerz
中科院分区：
文献类型：
--
作者：
N. Hannerz
研究了合金和残余元素对板坯连铸横向再弯裂纹的影响。对一年产量（包括 35 530 块板坯）的统计评估是根据钢材的热塑性进行的。 Gleeble 机器上的冷却和再弯曲应变循环的热机械模拟用于评估临界温度范围内的塑性。一般来说，增加横向裂纹的元素会对热塑性产生负面影响，这表明模拟技术可用于预测横向裂纹敏感性。Nb、Al、Al+N、V 等元素似乎是有害的，而根据 Gleeble 研究，N 没有有害影响，除非与 Al 结合使用。可能由于清除作用，Ti 提高了含 Al+N 钢的塑性。高含量的磷提高了塑性，生产统计数据也给出了类似的迹象。此外，在该范围内提高C含量可以提高抗横向裂纹性。统计数据和热塑性测试表明 B 具有有益的影响。还研究了 Cu 和 Mo 的影响。从生产统计中获得的 S 的显着不利影响并未通过 Gleeble 模拟中类似的塑性下降反映出来。根据最近的出版物对结果进行了讨论，并适当考虑了物理冶金因素的影响。
The influence of alloy and residual elements on transverse rebend cracking at continuous slab casting was studied. Statistical evaluation of one year's production comprising 35 530 slabs is set in relation to the hot plasticity of the steels. Thermomechanical simulation of the cooling and the rebend strain cycle on a Gleeble machine was used to evaluate plasticity in the critical temperature range. Generally elements that increase transverse cracking negatively influence hot plasticity, which demonstrates that the simulation technique can be used to predict transverse cracking susceptibility.Elements as Nb, Al, Al+N, V appear to be detrimental, while N according to the Gleeble studies had no detrimental effect except when in combination with Al. Due possibly to a scavenging effect Ti improves plasticity of Al+N containing steels. High contents of P improve plasticity and production statistics gave similar indications. Further a raised content o f C within the range might improve resistance to transverse cracking. Statistics as well as hot plasticity testing point towards a beneficial influence of B. Also the influence of Cu and Mo was studied. The significant detrimental influence of S obtained from production statistics was not reflected by a similar drop of plasticity at Gleeble simulation. The results are discussed in terms of recent publications with due consideration to the influence of physical metallurgical factors.