Performance Comparison of Zn-Based and Al-Si Based Coating on Boron Steel in Hot Stamping.
Performance Comparison of Zn-Based and Al-Si Based Coating on Boron Steel in Hot Stamping.
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硼钢热冲压锌基和铝硅基涂层性能比较
DOI：
10.3390/ma14227043
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发表时间：
2021-11-20
期刊：
影响因子：
--
通讯作者：
Li X
中科院分区：
文献类型：
--
作者：
Chen L;Chen W;Cao M;Li X
硼钢的涂层对热冲压件的质量起着重要的影响，因此在设计工艺之前评估涂层的热冲压性能非常重要。以硼钢U型热冲压件为研究对象，对GA（镀锌）、GI（镀锌）和Al-Si涂层样品的表面质量、显微组织和温度变化进行观察和分析，评价不同涂层的抗氧化、成形和淬火性能。结果表明，所有的 GA、GI 和 Al-Si 涂层都能提供良好的氧化保护，并可充当润滑剂，避免样品基材和模具表面的摩擦损伤。但GA、GI和Al-Si涂层的不同成分会导致不同的颜色。在相同变形程度下，Al-Si涂层可以提供最好的基体保护，而GI涂层会因液态金属脆化现象而在基体中引起裂纹。 GA、GI和Al-Si涂层的淬火性能没有显着差异，并且GI涂层的导热率略优于Al-Si和GA涂层。
The coatings of boron steels play an important role in affecting the quality of hot stamping parts, so it is important to evaluate the hot stamping performance of coatings before designing processes. Taking the U-type hot stamping part of boron steel as research objects, the surface quality, microstructure and temperature variation of samples with GA (galvannealed), GI (galvanized) and Al–Si coatings were observed and analyzed to evaluate the anti-oxidation, forming and quenching performances of different coatings. The results show that all the GA, GI and Al–Si coatings could provide good oxidation protection and also act as the lubricants for avoiding the friction damage of sample substrates and die-surface. But the different compositions of GA, GI and Al–Si coatings will contribute the different colors. Under the same deformation degree, the Al–Si coating can provide the best substrate protection and the GI coating will induce cracks in the substrate because of the liquid metal-induced embrittlement phenomenon. There is no significant difference between the quenching performances of GA, GI and Al–Si coatings, and the thermal conductivity of the GI coating is slightly better than Al–Si and GA coatings.
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