锻压技术

冷轧超高强马氏体钢HC1030/1300MS的高速力学特性

英文标题：High-speed mechanical properties of cold-rolled ultra-high strength martensitic steel HC1030/1300MS

单位：1.郑州工业应用技术学院机电工程学院 2. 江苏科技大学材料科学与工程学院

分类号：TG142.41；U465.1+1

出版年,卷(期):页码：2025,50(7):263-270

摘要：

为分析冷轧超高强马氏体钢 HC1030/1300MS 的微观组织、静动态力学性能及防撞梁承载特性，采用扫描电镜观察微观组织与断口形貌，通过液压伺服高速拉伸试验机测试高速力学性能，并开展静态三点弯曲与 0.5、1 m 高度动态落锤压溃试验。结果表明：材料强度随应变速率升高呈现增强效应；断口形貌呈现韧性断裂特征，随应变速率的增加，断口三区域特征减弱，而韧窝的密度和深度增大；与静态加载工况相比，0.5 m高度动态落锤压溃试验中的最大载荷和平均载荷分别提升了12.5%和10.5%；1 m高度动态落锤压溃试验对于0.5 m高度，最大载荷提升了43.9%，平均载荷则提升24.5%；防撞梁的承载能力随加载能量和速度的增加而增强，最大载荷、平均载荷和最大位移增幅明显。

To analyze the microstructure, static-dynamic mechanical properties and load-bearing characteristics of anti-collision beams made of cold-rolled ultra-high strength martensitic steel HC1030/1300MS, the microstructures and fracture morphologies were used to observe by scanning electron microscopy. High-speed mechanical properties were tested via a hydraulic servo high-speed tensile testing machine, and static three-point bending and dynamic drop-weight crushing tests at 0.5 and 1 m heights were conducted. The results show that the strength of the material increases with the increasing of strain rate. The fracture morphologies exhibit the ductile fracture characteristics. With the increasing of strain rate, the three-region fracture feature diminishes, while the density and depth of dimples increase.Compared with the static loading condition, the maximum load and average load in the dynamic drop-weight crushing test at height of 0.5 m are increased by 12.5% and 10.5%, respectively. In the dynamic drop-weight crushing test at height of 1 m, compared with that at a height of 0.5 m, the maximum load and the average load are increased by 43.9% and 24.5%, respectively. The load-bearing characteristic of the anti-collision beam is increased with the increasing of the loading energy and speed, showing notable improvements in maximum load, mean load, and maximum displacement.

基金项目：

河南省教育科学规划一般课题（2024YB0415）；新一轮河南省重点学科（机械）（教研〔2023〕414号）;河南省科技攻关项目（192102210224）

作者简介：齐瑞晓（1982-），男，学士，高级工程师 E-mail：qrx201820@163.com

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