1 Products Description
People have studied GR1 Titanium Clad Steel Plate for half a century, and developed a variety of preparation methods of titanium/steel composite plates, which has promoted the development and application of titanium/steel composite plates Although great progress has been made in the preparation, performance and application of titanium/steel composite plates, the following problems still exist:
(1) Size specification is limited With the continuous expansion of the application field of titanium/steel composite plate, the market has put forward new requirements for the size specification of GR1 Titanium Clad Steel Plate. However, due to equipment and technology reasons, the titanium/steel composite plate currently prepared still cannot meet the market demand of thin cladding, ultra-thin, ultra-thick or wide plate width
(2) The preparation cost is high The preparation of titanium/steel composite plates by hot rolling composite method has gradually become the main development direction of industrialization. However, vacuum electron beam welding is generally required for the assembly of billets before hot rolling composite. The high cost of equipment and preparation weakens the market competitiveness of titanium/steel composite plates
The interface bonding quality is unstable Because there are many factors that affect the interface bonding quality of titanium/steel composite plates, it is often easy to have problems such as different bonding strengths at different positions of the same titanium/steel composite plate and large differences in the interface bonding strengths of different batches of titanium/steel composite plates.
2 Application field of titanium steel composite plate
2.1 Equipment manufacturing field
The application of titanium steel composite plate in equipment field mainly includes: vacuum tower, distillation tower, heat exchanger, purified terephthalic acid oxidation reactor in oil refining plant, various reaction towers, sedimentation tanks, agitators, etc. in chemical plant, bleaching treatment tanks in textile printing and dyeing industry and paper industry, harsh sodium hypochlorite treatment tank in sewage treatment plant, salt making device and evaporation tank in vacuum salt making industry, titanium condenser tubesheet for nuclear power plant, Seawater desalination equipment, etc.
2.2 Marine civil engineering
Titanium is basically not easy to be corroded in seawater, has no toxicity to organisms, and has no impact on the ecological environment. It is an environment-friendly material. The titanium steel composite plate composed of titanium plate and steel plate has good corrosion resistance, high strength and low cost, and can be used as anti-corrosion material for steel structures in the field of marine civil engineering. Japan has set up ultra-large floating technology
The technical research team has carried out theoretical research and field tests on the super-large floating offshore structures with a scale of several kilometers and a durability of 100 years. A large number of titanium steel composites have been used at the place where the sea water droplets wash away.
3NDT requirements
1) For titanium steel clad plate equipment, regardless of the type of pressure vessel, its Class A and Class B welded joints are subject to 100% radiographic testing according to JB/T4730.2-2005 Non-destructive Testing of Pressure Equipment Part 2: Radiographic Testing and Class II is qualified.
2) The splicing welds of nozzle lining, titanium backing plate, and titanium cover plate shall be subject to 100% radiographic testing in accordance with Nondestructive Testing of Pressure Equipment Part 2: Radiographic Testing (JB/T4730.2-2005), and Class II is qualified.
3) For the formed titanium steel composite plate head, its surface
Ultrasonic testing can be carried out according to the provisions of 4.4 in JB/T4730.3-2005 Nondestructive Testing of Pressure Equipment Part 3: Ultrasonic Testing. The bonding state and bonding area shall not be lower than the requirements of Class B1 in NB/T47002.3-2009 Explosive Welded Composite Plates for Pressure Vessels - Part 3: Titanium Steel Composite Plates. The transition zone and straight edge section of the head shall be subject to 100% penetration test inside, and the grade I is qualified; 100% magnetic particle testing was performed on the outside, and the grade I was qualified.
4) The following welded joints shall be in accordance with JB/T4730.5-2005
Non-destructive Testing of Pressure Equipment - Part 5: Penetrant Testing carried out 100% penetrant testing, and Class I is qualified.
① Class C, D, and E welded joints on vessels;
② All welded joints of titanium coating;
③ Welded joint between heat exchange tube and tube sheet;
5) After the final hydrostatic test, 100% penetrant testing shall be carried out on all welded joints, and Class I is qualified
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