POSTHEAT TREATMENT FOR WELDED MEMBER OF ALPHA PLUS BETA TITANIUM ALLOY

PROBLEM TO BE SOLVED: To provide a postheat treatment method capable of giving sufficiently satisfactory characteristics of weld zone and weld heat-affected zone, required of a structural member, without deteriorating the characteristics of a base material of alpha plus beta titanium alloy. SOLUTION...

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Bibliographische Detailangaben
Hauptverfasser:	IIIZUMI HIROSHI, OGAWA ATSUSHI
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING FERROUS OR NON-FERROUS ALLOYS MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a postheat treatment method capable of giving sufficiently satisfactory characteristics of weld zone and weld heat-affected zone, required of a structural member, without deteriorating the characteristics of a base material of alpha plus beta titanium alloy. SOLUTION: An alpha plus beta titanium alloy, containing the alloying elements (by weight percentage) in which the value of Moeq, defined by equation Moeq=[Mo]+0.67×[V]+0.44× [W]+0.28 ×[Nb]+0.22×[Ta]+2.9×[Fe] +1.6×[Cr]+1.1×[Ni]+1.4× [Co]+0.77X[Cu]-[Al], is regulated to 2-7wt.%, is welded to a titanium material of the same or a different kind and then heated and held to and at a temp. in the range between (Tβ-230) and (Tβ-80) deg.C when the β-transformation temp. of the alpha plus beta titanium alloy is represented by Tβ.