超低碳烘烤硬化钢板H180BD表面波纹度影响因素分析

doi:10.13251/j.issn.0254-6051.2025.12.029

摘要/Abstract

摘要： 以超低碳烘烤硬化钢板H180BD为研究对象,研究了热镀锌前的退火温度(800、820和830 ℃)及光整辊粗糙度(1.4、1.8和2.2 μm)对热镀锌板表面波纹度W_sa的影响。利用光学显微镜、扫描电镜观察晶粒尺寸、表面形貌,采用T8000设备测试表面波纹度。结果表明,晶粒尺寸越小,W_sa值越低。控制合理的退火温度,可得到尺寸均匀、细小的组织。光整辊粗糙度越低,钢板W_sa值越小。在最佳退火温度820 ℃、光整辊粗糙度1.4 μm下,所得钢板W_sa值为0.28 μm,有利于后续喷漆处理。

关键词: 烘烤硬化钢, 表面波纹度, 退火温度, 晶粒尺寸, 光整处理

Abstract: Effects of annealing temperature (800, 820, 830 ℃) before hot-dip galvanizing and finishing roller roughness (1.4, 1.8, 2.2 μm) on surface waviness W_sa of hot-dip galvanized steel plate H180BD were investigated. The grain size and surface morphology were observed by optical microscope and scanning electron microscope, and the surface waviness was tested by T8000 equipment. The results indicate that the smaller the grain size, the lower the W_sa value. By controlling the annealing temperature reasonably, uniform and fine microstructure can be obtained. The lower the roughness of the finishing roller, the smaller the W_sa value of the steel plate. At the optimal annealing temperature of 820 ℃ and the roughness of the finishing roller of 1.4 μm, the W_sa value of the obtained steel plate is 0.28 μm, which is beneficial for subsequent painting treatment.

Key words: bake hardened steel, surface waviness, annealing temperature, grain size, skin pass process

中图分类号:

TG142.1

吴庆美, 卜凡征, 郭强, 肖景江, 郑连辉. 超低碳烘烤硬化钢板H180BD表面波纹度影响因素分析[J]. 金属热处理, 2025, 50(12): 191-194.

Wu Qingmei, Bu Fanzheng, Guo Qiang, Xiao Jingjiang, Zheng Lianhui. Analysis of factors affecting surface waviness of ultra-low carbon bake hardened steel plate H180BD[J]. Heat Treatment of Metals, 2025, 50(12): 191-194.

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