论文部分内容阅读
针对大型2.25Cr1Mo0.25V钢锭中存在的大量尺寸小于100μm的微夹杂,采用热压缩实验及有限元数值模拟其对高温变形及损伤行为进行研究。结果表明,微夹杂变形能力取决于其内部状态,当内部无裂纹时,强度较高,热变形前后自身不变形也不破裂,但会引起附近基体开裂;当其内部含有微裂纹时,强度明显降低,可以随基体一起变形,不会对基体造成明显损伤。
Aiming at a large number of micro-inclusions less than 100μm existing in large 2.25Cr1Mo0.25V ingot, hot deformation and finite element simulation are used to study the deformation and damage behavior at high temperature. The results show that the ability of micro-inclusions to deform depends on its internal state. When there is no crack in the interior, the strength is high. Before and after thermal deformation, it does not deform or rupture itself, but it will cause the cracking of the nearby matrix. When the micro-inclusions contain microcracks, Lower, with the matrix can be deformed, will not cause significant damage to the substrate.