Water cooling jacket for titanium alloy tube ring seam by tungsten argon arc welding and seam following cooling welding method
Patent Information
- Authority / Receiving Office
- CN · China
- Current Assignee / Owner
- HARBIN INST OF TECH
- Publication Date
- 2006-03-22
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
technical field
[0001] The invention relates to a water cooling jacket for welding and a welding method using the water cooling jacket. Background technique
[0002] Titanium is a kind of active metal. It reacts with oxygen, nitrogen and hydrogen at a high temperature during welding. It starts to absorb hydrogen at 250°C, and quickly absorbs hydrogen above 300°C; starts to absorb oxygen at 400°C, and quickly Oxygen inhalation; Nitrogen absorption starts at 600°C and quickly absorbs nitrogen above 700°C. Titanium and titanium alloys have great affinity for hydrogen, oxygen, nitrogen, etc. at high temperatures. If the liquid molten pool and molten metal are not effectively protected, they will be more easily polluted by air and the degree of embrittlement will be more serious. Difficulty in welding. At the same time, titanium alloy has poor thermal conductivity and large resistivity, so it generates more heat during welding, has a large heat capacity, and is not easy to lose...