鋅鋁鎂沖壓后表面黑點缺陷原因分析

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摘 要：針對唐鋼鍍鋅鋁鎂板在沖壓過程中出現(xiàn)的表面黑點現(xiàn)象，使用光學(xué)顯微鏡（OM）、掃描電子顯微鏡（SEM）及能譜儀等檢測儀器進行檢測，分析其沖壓后表面出現(xiàn)黑點的原因，結(jié)果表明，在鋅鋁鎂鍍層鋼板沖壓過程中，鍍層開裂，潤滑油夾雜著異物顆粒在寬裂紋處聚集，表現(xiàn)為黑點缺陷。

關(guān)鍵詞：鍍鋅鋁鎂板；沖壓件；裂紋；黑點

CAUSE ANALYSIS OF ZAM SURFACE BLACK SPOT DEFECT AFTER STAMPING

Wei Huanjun    Zhang Chunhua    Tian Xiugang    Mei Shuwen    Guojian

（Tangshan Iron and Steel Group Co.，Ltd.    Tangshan    063000，China）

Abstract：In response to the phenomenon of black spots on the surface of hot-dip galvanized aluminum magnesium plates of Tangshan Iron and Steel during the stamping process， detection instruments such as optical microscopy （OM）， scanning electron microscopy （SEM）， and energy dispersive spectroscopy were used to analyze the reasons for the appearance of black spots on the surface after stamping. The results showed that during the stamping process of hot-dip galvanized aluminum magnesium coated steel plates， the coating cracked， and lubricating oil mixed with foreign particles gathered at the wide cracks， resulting in black spot defects.

Key words： galvanized aluminum magnesium sheet; stamping parts; crack; black spot

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鋅鋁鎂鍍層耐腐蝕性能優(yōu)異，且有切口自愈性，其耐腐蝕效果相當(dāng)于熱浸鍍鋅鋼板的15倍，相當(dāng)于熱浸鍍鋅鋁合金鋼板的5倍 ～ 8倍，且耐紅銹性高，此外ZAM鍍層硬度高，其維氏硬度為140 ～ 160 HV[1]，具有卓越的耐磨損性。（剩余2737字）