GR1, GR2, GR3, GR4, GR6 Seamless Titanium Pipe Tube Extruded, Cold Rolled, Forging

1. What is a titanium pipe/tube?

Tubes composed of titanium are referred to as titanium tubes. Titanium tubes are strong, lightweight, and have excellent mechanical characteristics. It is frequently used in heat exchangers, condensers, evaporators, delivery pipes, serpentine tube heat exchangers, coil heat exchangers, and tube heat exchangers. Titanium tubes are commonly used in the nuclear power industry as standard tubes for their units.

Titanium tubes are strong, lightweight, and have superior mechanical characteristics. It is frequently used in heat exchangers, condensers, evaporators, delivery pipes, serpentine tube heat exchangers, coil heat exchangers, and tube heat exchangers. Titanium tubes are commonly used in the nuclear power industry as standard tubes for their units.

Titanium tube production process flow

Forging rod -> extrusion (cross-rolled and pierced) -> cold rolling -> oil removal -> pickling -> annealing -> finishing -> cutting to length -> inspection -> packaging and storage.

1. Boring and hole expansion: Transfer the bar blank from the Fifth Factory: The first step is to bore the hole on the lathe, and then continue to expand the hole after boring, thus forming an extruded tube blank.

2. Extrusion: Then the expanded tube blank is copper-clad, and then placed in a power frequency induction furnace for heating. The heated tube blank is put into a 3150t hydraulic press for extrusion (since extrusion is a hot process Processing, considering that metal is easily contaminated by gas during heating and extrusion, appropriate protective measures should be taken. When extruding, appropriate lubricants should be selected to prevent sticking to the mold. For example, using jacketed extrusion and glass lubrication Extrusion. Generally, copper sheathing is used)

3. The tube blank after extrusion is too long to be loaded on the rolling mill and contains copper skin, so it must be cut to length and then pickled to remove the copper skin (usually sulfuric acid H2SO4 is used to remove the copper skin, titanium is not easily soluble) In sulfuric acid, and copper sulfate can be produced after pickling), this is the tube blank that can be put on the rolling mill.

4. Opening the billet on the LG80 rolling mill: The extruded tube billet has many defects, so it needs to be repaired and inspected. Surface defects can be removed with a scraper before they can be rolled on the rolling mill. (This is the scraper you usually see)

5. Degreasing: Molybdenum disulfide and process oil are needed for lubrication and protection during the rolling process. Therefore, degreasing and pickling are required before entering the annealing furnace to ensure that the internal and external surfaces are clean without contaminating the annealing furnace. Use detergent and saponification solution to remove molybdenum disulfide.

6. Pickling: Pickling, comprising pickling in the intermediate process and pickling in the end product, is an auxiliary step in the cold processing manufacturing of titanium tubes. Pickling before the end product is used to successfully remove the oxide layer from the titanium pipe's surface. Pickling in the intermediate process is used to improve surface quality, get the pipe ready for the next step, and keep the surface clean before annealing. (The vacuum degree of the vacuum annealing furnace cannot be guaranteed due to outdated equipment.)

The basic ingredients of the solution are hydrofluoric acid (HF) and nitric acid (HNO3). The ratio of the solution's concentration is: (30%–40%) HNO3 + (3%～5%) The solution temperature for HF plus the remaining H2O is 50 °C. Three to ten minutes are needed for pickling. Pickling, hot water washing, cold water rinsing, and drying are the steps in the process.

7. Annealing: Annealing also includes intermediate annealing and finished product annealing. After the cold deformation of metal, its strength and hardness increase, and its plasticity decreases. Intermediate annealing is generally complete annealing. The purpose is to recrystallize the tube structure to restore its plasticity before rolling, eliminate the "work hardening" and residual stress generated during the rolling process, and reduce the material's deformation resistance and plasticity. was restored and rolling could continue. The purpose of heat treatment of finished products is to obtain products with certain structures and properties and recrystallization annealing is generally used.

Advantages and Disadvantages of Titanium pipe/tubes

1. High strength, low density, good mechanical properties, good durability and corrosion resistance.

2. High viscosity, difficult cutting and processing, poor wear resistance, and complex production process.

2. Chemical composition of titanium pipe/tubes

3. Mechanical properties of titanium pipe/tubes

4. Physical properties of titanium pipe/tubes

5. Specifications of titanium pipe/tubes

Being a trustworthy titanium pipe/tube manufacturer and supplier, Shanghai Yinggui Metal Pbaructs Company aims to make manufacturing easier for our business partners. Shanghai Yinggui Metal offers GR1, GR2, GR3, GR4, GR6, GR9, GR18, GR19, GR26, GR29 etc.

6. Applications and characteristics of titanium pipe/tubes

Performance characteristics of titanium pipe/tubes steel

1. The specific strength of titanium tubes is high. Titanium alloys typically have a density of 4.5g/cm3, which is just 60% of steel. Pure titanium has a strength that is comparable to that of common steel. Many alloy structural steels cannot match the strength of some high-strength titanium alloys.

2. Titanium tube has high thermal strength. The service temperature of the titanium tube is several hundred degrees higher than that of aluminum alloy, and it can work at temperatures of 450 to 500°C for a long time.

3. Titanium tube has good corrosion resistance. Titanium alloy works in humid atmosphere and seawater medium, and its corrosion resistance is much better than stainless steel; it is particularly resistant to pitting corrosion, acid corrosion, and stress corrosion; it is resistant to alkali, chloride, chlorine-based organic substances, nitric acid, and sulfuric acid. etc. have excellent corrosion resistance.

4. Titanium tube has 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 maintain a certain plasticity at -253°C.

5. Titanium tubes have high chemical activity. Titanium has high chemical activity and produces strong chemical reactions with O, N, H, CO, CO2, water vapor, ammonia, etc. in the atmosphere.

6. Titanium tube has small thermal conductivity and small elastic modulus.

7. Main titanium product brand list