镁对IF钢热镀锌镀层的组织和性能的影响

1.沈阳理工大学,装备工程学院,沈阳,110168

2.沈阳理工大学,装备工程学院,沈阳,110168

3.东北大学,材料与冶金学院,沈阳,110004

4.东北大学,材料与冶金学院,沈阳,110004

基金项目: 国家高技术研究发展计划(863计划)(2003AA331080)

EFFECT OF ADDITION OF AZ31 MAGNESIUM ALLOY INTO ZINC BATH ON MICROSTRUCTURE AND ERICHSEN NUMBER OF HOT-GALVANIZING COATING ON IF STEEL

IF钢在添加镁的锌液中热镀锌时,镁含量对合金化前后镀层的显微组织和性能有明显影响.研究结果表明:镁含量低于1 mass%时,镀层组织是正常的栅柱状,杯突值很低;随镁含量增加,镀层的致密化和附着性提高,杯突值变大;镁含量超过3.5%时,锌液粘稠度显著增加,对热镀锌产生不利影响.最佳镁含量在3%左右.

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