Several points about utilizing the mechanical and physical properties of Titanium in the processing of Titanium Tubing and titanium plates:
(1) The elastic modulus of titanium is relatively low compared with its tensile performance, so a large rebound allowance must be considered in the operation of compression and roller. It is precisely because of the lower modulus of elasticity that the cross-section of titanium parts is slightly larger than that of the same steel parts in order to achieve the same degree of stability.
(2) Titanium is easy to machine, but to consider its bite and stick tendency (larger than stainless steel) and low heat conduction performance, it is necessary to improve the commonly used machining technology and thread, supporting surface design. At minimum there should be rigid machine tools, sharp tools, when using moderate speed, large cutting amount, and leave room for chip removal, but also recommend the use of a large number of cooling lubricants.
(3) The thermal expansion coefficient of titanium is 75% that of carbon steel. Special attention should be paid to this in equipment design and manufacture where the combination of these two materials is required.
(4) Because titanium is a kind of active metal, when heated to more than 600℃, it is easy to combine with oxygen in the air, so titanium is usually not recommended for long-term use at a temperature higher than this.
(5) The mechanical strength of industrial pure titanium decreases rapidly when the temperature exceeds 150~200℃.
(6) The diffusion rate of hydrogen in titanium is faster than that of oxygen, so before hot processing, the heating furnace used should have a micro oxidation atmosphere, so that although it will produce a relatively thin oxide film, it can avoid the deep pollution caused by hydrogen.
(7) The soft industrial pure titanium plate, after annealing treatment is easy to cold form; hard industrial pure titanium and Ti2.5Cu need medium temperature processing, and for Ti6Al4V processing temperature is the best 600~700℃.
(8) Composite plate can be obtained by explosive welding of thin titanium plate and thick steel plate, which can be used to manufacture high-pressure and high-temperature vessels and heat exchangers. But it's not economically viable to replace the whole titanium or the titanium lining of a suit.