Titanium is a new type of metal, and its properties are related to the content of impurities such as carbon, nitrogen, hydrogen, and oxygen. The main performance has the following aspects?
(1) Higher specific strength. The density of titanium alloy is generally around 4.5g / cm3, which is only 60% 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 sheets of steel. Therefore, the specific strength (strength/density) of the titanium alloy is much larger than that of other metal structural materials, and parts and components with high unit strength, good rigidity, and lightweight can be produced. Currently, titanium alloys are used in aircraft engine components, skeletons, skins, fasteners, and landing gear.
(2) High thermal strength. Titanium alloy still has high specific strength in the range of 150 ° C to 500 ° C, while the specific strength of aluminum alloy decreases significantly at 150 ° C. Titanium alloys can operate at temperatures up to 500 ° C, and aluminum alloys below 200 ° C.
(3) Good corrosion resistance. Titanium alloy works in a humid atmosphere and seawater medium, and its corrosion resistance is far better than that of stainless steel; it is particularly resistant to pitting, acid, and stress corrosion; organic objects such as alkali, chloride, and chlorine, nitric acid, and sulfuric acid And so have excellent corrosion resistance. However, titanium has poor resistance to reducing oxygen and chromium salt media.
(4) Good low-temperature performance. Titanium alloys can still maintain their mechanical properties at low and ultra-low temperatures. Titanium alloys with good low-temperature properties and extremely low interstitial elements, such as TA7, can still maintain a certain degree of plasticity at -253 ° C. Therefore, titanium alloy is also an important low-temperature structural material.
(5) Large chemical activity. Titanium has a large chemical activity, and it has a strong chemical reaction with O, N, H, CO, CO2, water vapor, ammonia, etc. in the atmosphere, and easily adheres to the friction surface.
(6) Small thermal conductivity and small elastic modulus. Titanium has a low thermal conductivity, so it has poor rigidity and is easy to deform. It is not suitable for making slender rods and thin-walled parts. The machining surface has a large amount of spring back during cutting, which may cause severe friction, adhesion, and stickiness on the flank of the tool. Knot wear.
In view of these chemical properties of titanium, what issues should be paid attention to during the cutting of titanium plate?
(1) For semi-automatic cutting, the guide rail should be placed on the plane of the titanium plate, and then the cutting machine should be placed on the guide rail. Note that the order cannot be reversed.
(2) The cutting parameters should be appropriate and should be reasonably determined according to the thickness of the titanium plate, so as to obtain a good cutting effect.
(3) Check whether the nozzle gas is unblocked, and unblock it if it is blocked.
(4) Before cutting the titanium plate, the surface must be cleaned and a certain space must be left, which can help the slag blow out.
(5) The distance between the cutting nozzle and the surface of the titanium plate should be appropriate, and it is not good to be too close or too far.
(6) The preheating of the titanium plate should be sufficient to avoid affecting the cutting process.
(7) If you cut workpieces of different sizes, you should first cut small pieces and then large pieces.
titanium tig welding wire grade 7 titanium wire titanium exhaust tubing thin titanium sheet
(1) Higher specific strength. The density of titanium alloy is generally around 4.5g / cm3, which is only 60% 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 sheets of steel. Therefore, the specific strength (strength/density) of the titanium alloy is much larger than that of other metal structural materials, and parts and components with high unit strength, good rigidity, and lightweight can be produced. Currently, titanium alloys are used in aircraft engine components, skeletons, skins, fasteners, and landing gear.
(2) High thermal strength. Titanium alloy still has high specific strength in the range of 150 ° C to 500 ° C, while the specific strength of aluminum alloy decreases significantly at 150 ° C. Titanium alloys can operate at temperatures up to 500 ° C, and aluminum alloys below 200 ° C.
(3) Good corrosion resistance. Titanium alloy works in a humid atmosphere and seawater medium, and its corrosion resistance is far better than that of stainless steel; it is particularly resistant to pitting, acid, and stress corrosion; organic objects such as alkali, chloride, and chlorine, nitric acid, and sulfuric acid And so have excellent corrosion resistance. However, titanium has poor resistance to reducing oxygen and chromium salt media.
(4) Good low-temperature performance. Titanium alloys can still maintain their mechanical properties at low and ultra-low temperatures. Titanium alloys with good low-temperature properties and extremely low interstitial elements, such as TA7, can still maintain a certain degree of plasticity at -253 ° C. Therefore, titanium alloy is also an important low-temperature structural material.
(5) Large chemical activity. Titanium has a large chemical activity, and it has a strong chemical reaction with O, N, H, CO, CO2, water vapor, ammonia, etc. in the atmosphere, and easily adheres to the friction surface.
(6) Small thermal conductivity and small elastic modulus. Titanium has a low thermal conductivity, so it has poor rigidity and is easy to deform. It is not suitable for making slender rods and thin-walled parts. The machining surface has a large amount of spring back during cutting, which may cause severe friction, adhesion, and stickiness on the flank of the tool. Knot wear.
In view of these chemical properties of titanium, what issues should be paid attention to during the cutting of titanium plate?
(1) For semi-automatic cutting, the guide rail should be placed on the plane of the titanium plate, and then the cutting machine should be placed on the guide rail. Note that the order cannot be reversed.
(2) The cutting parameters should be appropriate and should be reasonably determined according to the thickness of the titanium plate, so as to obtain a good cutting effect.
(3) Check whether the nozzle gas is unblocked, and unblock it if it is blocked.
(4) Before cutting the titanium plate, the surface must be cleaned and a certain space must be left, which can help the slag blow out.
(5) The distance between the cutting nozzle and the surface of the titanium plate should be appropriate, and it is not good to be too close or too far.
(6) The preheating of the titanium plate should be sufficient to avoid affecting the cutting process.
(7) If you cut workpieces of different sizes, you should first cut small pieces and then large pieces.
titanium tig welding wire grade 7 titanium wire titanium exhaust tubing thin titanium sheet
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