Preparation method of seamless high-pressure gas cylinder and gas cylinder
A high-pressure gas cylinder and seamless technology, which is applied to the preparation method of gas cylinders and the field of gas cylinders, can solve the problems of poor internal and external surface quality, high equipment requirements, and difficult to remove internal surface defects, and achieve stress relief, work hardening, mechanical Good performance and good surface quality
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[0059] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples cited are only used to explain the present invention, and are not used to limit the scope of the present invention.
[0060] The present invention relates to a method for preparing a seamless high-pressure gas cylinder. Taking titanium alloy pipe fittings used in Ti80 titanium alloy high-pressure gas cylinders as an example, the Ti80 titanium alloy high-pressure gas cylinder has an outer diameter of 500 mm and a length of 3000 mm, and includes the following steps:
[0061] Step 1. Prepare a cylindrical blank,
[0062] First, prepare the initial billet, use VAR smelting technology to melt the alloy elements according to the proportion, and ensure that the chemical composition of the formed initial billet (in weight percentage) meets:
[0063] Alloying elements: Al5.5%~6.5%, Zr1.5%~2.5%, Nb2.5%~3.5%, Mo0.6%~1.5%, impurity elements Fe≤0.25%, Si≤0.15...
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