Welding process of semi martensitic stainless steel pneumatic ball valve seat Forging At forging temperature, 17-4PH steel has poor plasticity, large deformation resistance and is prone to cracks. Forging temperature shall be strictly controlled. The initial forging temperature is 1180 ℃, and the final forging temperature is 1010 ℃. Blank heating 3~3 After 5h, the temperature reached 1230 ℃, and the first heat forging was carried out after discharging, no abnormality was found. The second heat forging was carried out after 0.5 h of reheating, and no abnormality was found. Level at 900~950 ℃ to prevent flash cracks. In addition, a punch shall be used in the forging process, and the punch shall have a certain taper. In order to increase the reaming effect, several punches can be used together.

How to select non-metallic compensator? How to ensure the inspection quality?
Target users and indirect users are always annoyed about choosing square and round non-metallic compensators. How many manufacturers are there in such a large market? How to choose? How to ensure the normal use of the products used is gradually explained to you: first of all, the needs of users must be the application environment, application location, application location, non-metallic compensator in industrial applications, power plants, power stations, power construction, new projects, pipeline connections, fans, etc. are often used to make supporting parts, what is the working environment of steel wire silicone tape, The problem of wind pressure should be considered. If the wind pressure in the pipeline is high, it is recommended to use silicone tape with steel wires for safety. The cloth used for non-metallic compensator is made of silicone rubber cloth and other high-temperature and fireproof materials. There are 7-10 layers, 3-4 layers and 5-6 layers, which are fed according to the temperature of the compensator.
When selecting, users should see whether it is a self consuming manufacturer. These are indirectly analyzed from the quotation. There must be some doubt that the price of waste products is too high. Self consumption refers to the decisive role of non-metallic shrinkage in the scope of use in terms of whether there is welding equipment talent and the ingredients of the fabric layer are pressed:
1. Non metal compensator: silicon tape compensator for power plant can be used as flexible joint device of pipeline, which can deal with the destruction of pipeline caused by thermal expansion and cold contraction. Silicon tape has high temperature resistance, corrosion resistance, aging resistance, good elasticity and flexibility, and can be widely used in petroleum, chemical industry, cement, energy and other fields.
2. Electrical insulation: The silicon tape used for compensation of non-metallic shrink joint power plant has a higher electrical insulation grade, can accept high voltage load, and can be made into insulating cloth, sleeve and other products.
3. Temperature resistance: special silicon tape compensator for power plant is used as fire blanket, fire curtain, temperature resistance and flame retardant materials
4. Anticorrosion: silicone rubber coated with glass fiber cloth can be used as the internal and external anti-corrosion coating of pipes, which has excellent anti-corrosion performance and high strength, and is an ideal anti-corrosion material.
Delivery inspection is also one of the indispensable guarantees of the manufacturers on the right track. Our factory has recorded the delivery pressure inspection on pneumatic butterfly valves, metal and non-metallic compensators, and rubber flexible joints, which have been checked by professionals, and our factory's management system has ended!