FV520B鋼和Q235A鋼焊接接頭的維氏硬度試驗FV520B鋼和Q235A鋼焊接接頭的維氏硬度試驗Vickers Hardness Test of Welding Joints of FV520B Steel and Q235A Steel 在沒有x-y軸移動裝置的HV-120型維氏硬度計上，僅增加簡單的輔助工具，成功完成了FV520B馬氏體沉淀硬化不銹鋼和Q235A鋼V型焊縫焊接接頭的維氏硬度試驗。結(jié)果表明：FV520B鋼焊接接頭的焊縫、熔合線、熱影響區(qū)以及母材的維氏硬度差別較小，硬度分布比較均勻，焊接質(zhì)量滿意；Q235A鋼焊接接頭的焊縫、熔合線、熱影響區(qū)以及母材的維氏硬度差別更小，硬度分布更加均勻，焊接質(zhì)量更好。該試驗方法操作簡單、方便實用，可以完成V型焊縫焊接接頭的維氏硬度測試，對使用沒有x-y軸移動裝置的維氏硬度計的企業(yè)進行焊縫質(zhì)量評定具有借鑒作用。 The Vickers hardness tests of V-type welding joints of FV520B steel, a kind of martensitic precipitation hardening stainless steel, and Q235A steel were successfully completed by HV-120 type Vickers hardness tester which had no x-y coordinate bench and was equipped with some simple auxiliary tools. The results show that:the Vickers hardness difference among welding seam, fusion line, heat affected zone and base metal of the welding joint of FV520B steel was small, the hardness was well distributed and the welding quality was desirable; the Vickers hardness difference among welding seam, fusion line, heat affected zone and base metal of the welding joint of Q235A steel was even smaller, the hardness was better distributed and the welding quality was better. The testing method was convenient, practical and easy to operate, and it was qualified to test the Vickers hardness of V-type welding joints and provide a reference for those who carried out the welding quality evaluation by Vickers hardness tester without x-y coordinate bench.
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