论文部分内容阅读
利用有限元软件DEFORM-3D/HT对22Mn B5高强钢盒形件的热成形过程进行了数值模拟,分析了板料与模具之间的“贴模”状态对盒形件温度场和组织的影响。结果显示:板料“贴模”程度明显影响盒形件冷却速度和微观组织构成。较小的模具间隙使22Mn B5板料“贴模”紧密,高温的板料与较低温度的模具接触面积增大,导致板料冷却速度大大提高,由此出现了马氏体相变;较大的模具间隙使22Mn B5板料“贴模”变差,热成形板料与模具接触面积变小,使盒形件冷却速度降低,组织中仅出现珠光体和铁素体相变。
The finite element software DEFORM-3D / HT was used to simulate the thermoforming process of 22Mn B5 high-strength steel box, and the influence of the “die-bonding” state between the sheet and the die on the temperature field and the structure of the box- Impact. The results show that: the sheet “mold ” significantly affect the degree of box-shaped pieces of cooling speed and microstructure. Smaller die clearance makes 22Mn B5 sheet ; Larger mold gap so that the 22Mn B5 sheet “die ” worse, the contact area of the thermoformed sheet with the mold becomes smaller, so that the box-shaped pieces of cooling rate decreased, the organization only pearlite and ferrite phase change.