904L+Q345R composite board pressure vessel seal head heat treatment cooler and usage method thereof
A technology for heat treatment cooling and pressure vessels, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., to achieve good corrosion resistance
Inactive Publication Date: 2017-05-31
LANZHOU LS HEAVY EQUIP
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Problems solved by technology
However, there is no suitable spray water cooler for subsequent normalizing heat treatment process
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[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0013] The thermoformed head is hoisted from the press to the heat treatment furnace while it is hot, and the final temperature of the head after pressing should not be lower than 850°C. Heat treatment, that is, normalizing process steps: the end of the head is facing down, placed on a flat support, rapidly heated to 850°C and then raised to 1010°C at a rate of ≤200°C / H, holding time for 35 minutes, and then quickly lifted to the cooling device for use The special cooler invented by our company performs spray water cooling treatment on the inner wall cladding, and at the same time monitors it with a far-infrared thermometer until the temperature of the base layer of the outer wall reaches 600-650°C, and the head is cooled to room temperature in still air.
[0014] The dedicated coolers, such as figure 1 As shown, its structure is com...
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The invention discloses a 904L+Q345R composite board pressure vessel seal head heat treatment cooler and a usage method thereof and relates to the field of manufacturing of composite board pressure vessel seal heads with pure austenite coatings and carbon steel base layers. The problem that a suitable spray water cooler does not exist during a normalizing heat treatment process is solved. A special cooler structure comprises a tuyere 1, a air inlet 2, a water inlet 3, a cavity part 4, a larynx part 5 and a horn mouth 6. The air inlet 2 communicates with the cavity part 4 through the tuyere 1. The water inlet 3 communicates with the cavity part 4 from the side face. The part, opposite to the tuyere 1, of the cavity part 4 is provided with the narrow and small larynx part 5. The outside of the larynx part 5 communicates with the horn mouth 6. When the cooler is used, a seal head 7 is placed on a support 9 horizontally with an opening of the seal head 7 faces down, the horn mouth 6 of a cooler body 8 is upwards placed below the seal head 7, pressurization is conducted, water and air are led in, thus water erupts in a cone-cylinder shape, and even spray water cooling is conducted on an inner wall coating of the seal head taken out of a furnace after thermal forming. The 904L+Q345R composite board pressure vessel seal head heat treatment cooler and the usage method thereof are widely suitable for spray water cooling of various similar heat treatment processes.
Description
technical field [0001] The invention relates to the field of manufacturing heat treatment of a composite plate pressure vessel head with a pure austenite coating and a carbon steel base layer. Background technique [0002] 904L, UNS No. N08904 is a low-carbon and high-nickel super austenitic stainless steel, non-ferrous base high-alloy material, which has good resistance to intergranular corrosion, uniform corrosion, Cl-pitting corrosion, crevice corrosion and stress corrosion . The 904L+Q345R composite panels used to be surfacing in the manufacturing plant, which often resulted in high surfacing costs for mass products, heavy workload, and high welding difficulty. If a composite structure is used, due to the large difference in thermal expansion coefficient between 904L and Q345R, it is easy to peel off the base layer and the composite layer during the stamping process; the subsequent normalizing heat treatment is still a big problem. The corrosion resistance will be grea...
Claims
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IPC IPC(8): C21D1/28C21D9/50
CPCC21D1/28C21D9/50
Inventor 王志刚马玉玫胡广岐宋浩张建晓周彩云王岑谈利民杜金涛忽俊成
Owner LANZHOU LS HEAVY EQUIP