Welding alloy and method of making and using the same
First Claim
1. A weld metal for welding of titanium member to a ferrous based alloy member as an intermediate transition zone between such members so as to overcome the metallurgical incompatibility of each such member, said weld metal consisting of a vanadium metal and titanium and iron.
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Abstract
The invention is a weld metal for welding of a titanium alloy member to a ferrous based alloy member as an intermediate transition zone between such members so as to overcome the metallurgical imcompatability of each such member, and which consists of a vanadium metal, titanium and iron and inconsequential amounts of brittle intermetallic compounds. The preferred weld metal is vanadium rich and contains no more than 50% combined weight of titanium and such a weld metal is produced in accordance with our invention by fusion welding, particularly capacitor discharge welding, which because of its inherent but heretofore unrecognized extremely fast quench or freeze rates will produce a fusion weld between these two metallurgically incompatible alloys which is free of brittle intermetallic compounds. It is also part of our invention that such a weld metal of the aforesaid composition will have independent use as a welding alloy, particularly when fabricated in sheet form.
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Citations
11 Claims
- 1. A weld metal for welding of titanium member to a ferrous based alloy member as an intermediate transition zone between such members so as to overcome the metallurgical incompatibility of each such member, said weld metal consisting of a vanadium metal and titanium and iron.
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9. In a method of welding a titanium member to an iron member, the improvement comprising the step of:
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providing at least during the welding process itself a welding alloy consisting of a vanadium metal and at least one other metal taken from the group consisting of titanium and iron, whereby said alloy will substantially preclude the formation of brittle intermetallic compounds.
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10. A composite structure comprising a titanium alloy member and an iron alloy member joined together by a fusion weldment,
said fusion weldment constituting a transition zone of completely fused metals taken from the group consisting of titanium, iron and a base metal having solid solubility with titanium and iron, said base metal being present in an amount predominant to either said titanium or iron content.
Specification