淬火热处理温度对热成形钢铝-硅涂层的影响
Effect of Quenching Heat Treatment Temperature on Al-Si Coating of Hot Stamped Steel
摘 要
为研究淬火热处理温度对热成形钢铝-硅涂层的影响，采用DIL805A/D淬火膨胀仪、扫描电镜和能谱仪分析了热成形钢铝-硅涂层加热过程中3种不同厚度涂层的相结构及涂层厚度的变化规律。结果表明：相同淬火加热温度下，不同厚度的涂层中形成了不同的相结构，涂层越薄，铁向涂层方向、铝向钢基体方向扩散的路径越短，铁和铝的饱和时间越少，合金化时间也越少。奥氏体化后，涂层中出现了裂纹和孔洞，且随温度升高孔洞的数量变多、尺寸变大；涂层总厚度和相互扩散层厚度均随温度的升高而增大，同一加热温度下3种厚度涂层的相互扩散层厚度相当。
铝-硅涂层
淬火热处理
加热温度
涂层厚度
hot stamped steel
Al-Si coating
quenching heat treatment
heating temperature
coating thickness
Abstract
In order to study the effect of quenching heat treatment temperature on Al-Si coating of hot stamped steel, the phase structure of Al-Si coating on hot stamped steel with three kinds of thicknesses and the variation of coating thicknesses were analyzed by DIL805A/D quenching dilatometer, scanning electron microscopy and energy dispersive spectroscopy. The results show that under the same quenching heat temperature, different phase structures are formed in coatings with different thickness. The thinner the coating is, the shorter the path of iron to the coating direction and aluminum to the steel substrate direction is, the less saturation time of Fe and Al and alloying time are. After austenitizing, cracks and voids appear in the coating, and the number and size of voids increase with the increase of temperature. The total thickness of coating and the thickness of interdiffusion layer increase with the increase of temperature, and the thicknesses of interdiffusion layer of three kinds of coatings are the same at the same heating temperature.
中图分类号 TG143 DOI 10.11973/lhjy-wl202105003
所属栏目 试验与研究
基金项目
收稿日期 2020/12/16
修改稿日期
网络出版日期
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备注姜进京(1982-),男,学士,主要从事汽车整车开发设计工作,shjdjjj@163.com
引用该论文: JIANG Jinjing,ZHOU Lin,DENG Zongji. Effect of Quenching Heat Treatment Temperature on Al-Si Coating of Hot Stamped Steel[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2021, 57(5): 10～13
姜进京,周林,邓宗吉. 淬火热处理温度对热成形钢铝-硅涂层的影响[J]. 理化检验－物理分册, 2021, 57(5): 10～13
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【5】谷诤巍,姜超,单忠德,等.超高强度钢板冲压件热成形工艺[J].汽车工艺与材料,2009(4):15-17.
【6】谭娟,王俊,高海燕,等.高强钢合金化热镀锌研究进展[J].材料导报,2008,22(2):64-67.
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【8】张杰,江社明,张启富,等.加热工艺对热成形钢表面纯锌镀层组织和表面氧化物的影响[J].腐蚀与防护,2014,35(5):450-453.
【9】瓮金鹏,储双杰,张理扬,等.热镀锌高强钢的研究进展[J].材料保护,2012,45(8):40-44.
【10】GUI Z X, WANG K, ZHANG Y S, et al. Cracking and interfacial debonding of the Al-Si coating in hot stamping of pre-coated boron steel[J].Applied Surface Science,2014,316(15):595-603.
【11】LIANG W K, TAO W J, ZHU B,et al. Influence of heating parameters on properties of the Al-Si coating applied to hot stamping[J].Science China Technological Sciences,2017,60(7):1088-1102.
【12】GUI Z X, LIANG W K, ZHANG Y S. Enhancing ductility of the Al-Si coating on hot stamping steel by controlling the Fe-Al phase transformation during austenitization[J].Science China (Technological Sciences),2014,57(9):1785-1793.
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