万宇,亓海全,李文通,笪仲钟,王为民,李欣欣,谢盈盈,姚小凤

• 1:桂林理工大学材料科学与工程学院
• 2:桂林理工大学有色金属及材料加工新技术教育部重点试验室
• 3:四川航空工业川西机器有限责任公司

摘要(Abstract)：

在不同退火温度与贝氏体等温条件下，研究了采用不同方式冷却后残留奥氏体对车身结构钢DP780组织与性能的影响。结果表明：退火温度相同时，终冷冷速越慢，残留奥氏体含量越高；冷速相同时，残留奥氏体含量受退火温度的影响较小；残留奥氏体中的碳含量随等温温度的升高先减小后增大，残留奥氏体的热稳定性先升高后降低；随等温温度的升高，残留奥氏体尺寸逐渐减小，组织中的小角度晶界数量增多，小尺寸残留奥氏体及马-奥岛在小角度晶界附近呈弥散分布。退火及等温处理后DP780双相钢的抗拉强度虽略有下降但伸长率大幅上升，强塑积显著增大，从而使其综合力学性能得到改善。

关键词(KeyWords)： DP780双相钢;残留奥氏体;热稳定性;力学性能

Abstract:

Keywords:

基金项目(Foundation): 广西科技重大专项(桂科AA22067079)

作者(Author): 万宇,亓海全,李文通,笪仲钟,王为民,李欣欣,谢盈盈,姚小凤

DOI: 10.13289/j.issn.1009-6264.2024-0322

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