WELD MEMBER OF MOLTEN Zn-BASED PLATED SHEET STEEL EXCELLENT IN WELD ZONE APPEARANCE AND WELD STRENGTH

• Main Authors: NOBUTOKI TOMOKAZU, HOSOMI KAZUAKI, NAKAKO TAKEFUMI
• Format: Patent
• Language: English; Japanese
• Published: 20.07.2017
• Subjects: ALLOYS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; DIFFUSION TREATMENT OF METALLIC MATERIAL; FERROUS OR NON-FERROUS ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WELDING; WORKING BY LASER BEAM

PROBLEM TO BE SOLVED: To provide a weld member of a molten Zn-based plated steel sheet excellent in weld zone appearance and weld strength.SOLUTION: There is provided a weld member by melting molten Zn-based plated steel sheets having a composition of a plating layer which mainly contains Zn and containing, by mass%, Al:1.0 to 22.0% each other, wherein adhered amount W of the molten Zn-based plated steel sheet per a single surface is 15 to 250 g/m, blowhole occupancy Br is 30% or less, sputter adhered number in a region with length of 100 mm and width of 100 mm with a molten bead as a center of 20 or less, a composition of the plating layer contains one or more selected from a group consisting of Mg, Ti, B, Si, Fe in specific concentration ranges and arc weldment is conducted by using an Ar-COmixed gas as a shield gas.SELECTED DRAWING: None 【課題】溶接部外観と溶接強度に優れる溶融Ｚｎ系めっき鋼板の溶接部材を提供する。【解決手段】めっき層の組成が、Ｚｎを主成分とし、質量％でＡｌ：１．０〜２２．０％を含有する溶融Ｚｎ系めっき鋼板同士が溶接されてなる溶接部材であって、前記溶融Ｚｎ系めっき鋼板の片面あたりの付着量Ｗが１５〜２５０ｇ／ｍ２であり、ブローホール占有率Ｂｒが３０％以下であり、かつ溶接ビードを中心とした縦１００ｍｍ、横１００ｍｍの領域のスパッタ付着個数が２０個以下であり、めっき層の組成が、特定の濃度範囲のＭｇ、Ｔｉ、Ｂ、Ｓｉ、Ｆｅからなる群から選ばれる１あるいは２以上を含有し、シールドガスとしてＡｒ−ＣＯ２混合ガスを用いてアーク溶接されてなる、溶融Ｚｎ系めっき鋼板の溶接部材。【選択図】なし