The common process flow and contents of TC4 titanium plate and titanium alloy plate cutting are as follows:

(1) In case of semi-automatic cutting, the guide rail shall be placed on the titanium plate plane, and then the cutting machine shall be placed on the guide rail, and the order shall not be reversed.

(2) The cutting parameters shall be appropriate, which shall be reasonably determined according to the thickness of titanium plate, so as to obtain good cutting effect.

(3) Check whether the cutting nozzle gas is unblocked, and unblock it in time if there is any blockage.

(4) The surface of titanium plate shall be cleaned before cutting, and a certain space shall be reserved to facilitate the blowing out of slag.

(5) The distance between the cutting nozzle and the titanium plate surface should be appropriate, too close or too far is not good.

(6) The titanium plate shall be preheated sufficiently to avoid affecting the cutting process.

(7) If you cut workpieces of different sizes, you should first cut small pieces, then large pieces.

According to the data of titanium plate manufacturers, titanium is a new type of metal, and its performance is related to the content of carbon, nitrogen, hydrogen, oxygen and other impurities. The impurity content of Z-pure titanium iodide does not exceed 0.1%, but its strength is low and plasticity is high. The performance of 99.5% industrial pure titanium is density ρ= 4.5g/cm3, melting point 1725 ℃, thermal conductivity λ= 15.24W/(m.K), tensile strength σ B=539MPa, elongation δ= 25%, reduction of area ψ= 25%, elastic modulus E=1.078 × 105MPa, hardness HB195.

(1) High specific strength

The density of titanium alloy is generally about 4.5g/cm3, which is only 60% of that of steel. The strength of pure titanium is close to that of ordinary steel. Some high-strength titanium alloys exceed the strength of many alloy structural steels. Therefore, the specific strength (strength/density) of titanium alloy is far greater than that of other metal structural materials, as shown in Table 7-1. Parts and components with high unit strength, good rigidity and light weight can be made. At present, titanium alloy is used for engine components, framework, skin, fasteners and landing gear of aircraft.

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