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Abstract：
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Research results of forming LF6 alloy conical tube with half cone angle less than one degree are described in this paper.The forming scheme which utilize slab blank, straight and small coning mandrels, conventional spinning and power spinning is adopted. Firstly, blank is deformed into cylinder with hot conventional spinning in straight mandrel.Then thick-walled tube is forcedly thinned at room temperature after cylinder bottom is cut off. Finally, small coning mandrel and hot conventional spinning are adapted to form conical tube. It can be shown from the results that the ensured blank's high quality before spinning is required to avoid local defect and temperature must be well controlled at hot spinning. LF6 alloy has a good spinning performance. Selecting reasonable technological parameters, seamless conical tube of LF6 alloy with half cone angle less than one degree can be formed by spinning with blank.
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Reference：
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