热处理温度对薄铝硅镀层热成形钢的镀层组织和性能的影响  

Effect of Heat Treatment Temperature on the Coating Microstructure and Properties of Thin Al-Si Coated Hot Formed Steel

作　　者：徐闻慧 吕家舜 杨洪刚[1,2] 金勇 徐承明[1,2] 王永明 XU Wenhui;LYU Jiashun;YANG Honggang;JIN Yong;XU Chengming;WANG Yongming(State Key Laboratory of Metal Material for Marine Equipment and Application,Anshan 114009,China;Automobile and Home Application Steel Institute,Technology Center of Angang Steel Company Limited,Anshan 114009,China)

机构地区：[1]海洋装备用金属材料及其应用国家重点实验室,辽宁鞍山114009 [2]鞍钢股份有限公司技术中心,辽宁鞍山114009

出　　处：《材料保护》2025年第3期130-137,共8页Materials Protection

摘　　要：为了探究薄铝硅镀层钢板热成形后最优的表面性能,以Al-10Si薄镀层热成形钢板为研究对象,利用扫描电镜、辉光放电发射光谱仪、显微维氏硬度计、激光共聚焦显微镜、摩擦磨损试验机等仪器研究了不同热处理温度对其镀层组织和性能影响。结果表明:当热处理温度从820℃提高到930℃时,Al、Fe和Si间的互扩散越发充分,从组织上看,镀层中的Fe-Al-Si相、镀层与钢基板间的扩散层、镀层的总厚度逐渐增大,基体中的马氏体含量增多,形状呈粗大化趋势;从元素分布上看,镀层中Al、Si、Fe 3种元素扩散程度随之增大,元素浓度梯度逐渐变得平缓;从镀层性能上看,镀层的硬度先增加再下降;摩擦系数先升高再下降,摩擦系数曲线波动增大;划痕终端磨损量先明显减小而后略增加,且指针接触的犁沟底部起伏逐渐增多。For investigating the optimal surface properties of thin aluminum-silicon coated steel plate after hot forming,the Al-10Si thin coated hot formed steel plate was taken as the research object,and the effects of different heat treatment temperatures on the microstructure and properties of the steel plate were studied by means of scanning electron microscopy,glow discharge emission spectrometer,micro-Vickers hardness tester,laser confocal microscope and friction and wear testing machine.Results showed that when the heat treatment temperature increased from 820℃ to 930℃,the mutual diffusion of Al,Fe and Si progressively intensified.From the perspective of microstructure,the Fe-Al-Si phase in the coating,the diffusion layer between the coating and the steel substrate and the total thickness of the coating gradually increased,the martensite content in the substrate increased,and the shape showed a tendency of coarsening.From the element distribution,the diffusion extent of Al,Si and Fe in the coating increased,and the element concentration gradient became gentle gradually.From the property of coating,the hardness of coating increased first and then decreased.Moreover,the friction coefficient increased first and then decreased,and the curve fluctuation of friction coefficient increased.The end wear of the scratch decreased obviously at first and then increased slightly,and the bottom undulation of the furrow touched by the pointer gradually increased.

关 键 词：薄铝硅镀层 热处理温度 摩擦磨损 镀层组织 

分 类 号：TG174.4[金属学及工艺—金属表面处理]