Carbon steel valve sealing surface of the heat treatment
Epdm Seal Strip,Epdm Sealing Strip,Rubber Sealing Strip,Various Profiles Sealing Strip Xingtai City Xinyuan Sitong Auto Parts Co.,Ltd. , https://www.xystrubber.com
Carbon steel valve sealing surface heat treatment refers to the carbon steel valve body and gate welding cobalt chrome tungsten carbide sealing surface of the heat treatment. After the carbon steel gate valve surfacing cobalt chromium tungsten carbide sealing surface, to go stress annealing, the main purpose is to remove the residual stress generated by surfacing and improve machining performance. Carbon steel gate substrate for the welding of CoCrW hard alloy, SF-4 (137) alloy, WF330 or spray welding parts, stress relief annealing temperature according to the selection of carbon steel substrate material, the general use of 600 ~ 650 ℃. Insulation time depends on the effective thickness of the part, generally by 1h / 25mm, at least 2h. After cooling with the furnace cooled to 300 ℃ baked air cooled. As carbon steel gate valve for different media, you can choose a different surfacing sealing surface material. Gate valves suitable for water, steam, oil and their products are typically overlaid with Cr13 stainless steel, but some also have a chromium-manganese alloy (85 or 137 alloy), a copper alloy and an iron-based alloy. Surfacing materials according to the different effects of heat treatment can be divided into two categories. A class of cobalt chromium tungsten carbide as the representative, the hardness can not generally be changed by heat treatment, the hardness of the sealing surface by the welding material to ensure. Another type of stainless steel represented by Cr13, its hardness can be changed by heat treatment, sealing surface hardness (generally required 38 ~ 44HRC) can be achieved by heat treatment. Yu crane valve industry is committed to the environmental protection and energy industry valve construction. Protect the environment and save energy. Yu crane valve main application areas: water treatment, sewage sludge treatment, flue gas desulfurization and denitrification, air purification, waste management.