Manufacturing method of high-strength austenitic nickel-iron-chromium alloy and austenitic stainless steel composite plate head
A technology of austenitic stainless steel and production method, which is applied in the field of high-strength austenitic nickel-iron-chromium alloy + austenitic stainless steel clad plate head, can solve problems such as capillary cracks, achieve improved plasticity, little influence, Effects of stress relief and softening of materials
Active Publication Date: 2014-10-22
NANJING DUBLE METAL EQUIP ENG
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problem that the inner R arc part is easily generated in the production process of the high-strength austenitic nickel-iron-chromium alloy N08810+S31608 composite plate head To solve the problem of a large number of capillary cracks, the present invention provides a method for manufacturing high-strength austenitic nickel-iron-chromium alloy and austenitic stainless steel composite plate heads, such as the typical manufacturing scheme of N08810+S31608 series heads
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[0007] The following combination figure 1 The present invention will be described with specific embodiments. figure 1 Middle t1 is the heating time of the empty furnace before the head is put into the furnace; t2 is the heating time of the head with the furnace after being put into the furnace; t3 is the heat preservation time of the head in the furnace; t4 is the cooling time of the head in water after the head is out of the furnace; After the re-inspection is passed, the material is cut according to the size required by the process. The head plates that need to be spliced are spliced according to the process requirements. Various parameters and testing requirements must meet the process requirements. 100% PT inspection for spliced welds and plate surfaces, according to JB / T4730-2005 Class I qualification inspection; 100% UT inspection for head round plates to ensure that the bonding rate of the composite plate base layer ≥ 98%, and no single unbound area with an area ...
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Abstract
The invention discloses a manufacturing method of composite board seal head made from high-strength austenite nickel-iron-chromium alloy and austenite stainless steel. The manufacturing method comprises the following steps of: medium-temperature heat forming; after heat forming, carrying out a solution treatment process; and carrying out a pressing process, wherein the pressing process satisfies technological conditions as follows: a empty furnace is heated to 1000+ / -75 DEG C, a seal head circular plate is placed in the furnace at a temperature greater than or equal to 800 DEG C, and is then heated to 1100+ / -15 DEG C along with the furnace; the seal head circular plate is maintained at the temperature for 2-4h, and is then discharged from the furnace to be pressed for more than 2 times while the seal head circular plate is hot; the temperature of the seal head is measured at any time during the pressing process; and when the temperature of the seal head is lower than 850 DEG C, the seal head circular plate is put back into the furnace against to be heated, and the final pressing temperature of the seal head circular plate is no less than 850 DEG C. The manufacturing method disclosed by the invention employs processes of radial finishing polishing treatment before the composite board seal head is pressed, middle-temperature heat forming, and solution treatment after heat forming.
Description
technical field [0001] The invention relates to the production of a high-strength austenitic nickel-iron-chromium alloy (N08810 series)+austenitic stainless steel (such as S31608 grade) composite plate head, especially the manufacturing process of the head. Background technique [0002] High-strength austenitic nickel-iron-chromium alloy (typically such as N08810 grade) is a nickel-iron-chromium alloy with high strength in solid solution state, high temperature oxidation resistance and high temperature carburization resistance, and the nickel content of the alloy is 30. % to 35.0%, so it is resistant to stress corrosion cracking of chlorides and is not sensitive to the precipitation of σ phase. The alloy has excellent uniform corrosion resistance, and in the solution treated state, the N08810 alloy has excellent creep and stress crack resistance. Compared with stainless steel and other non-ferrous materials, N08810 material has better corrosion resistance to strong corrosiv...
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IPC IPC(8): B21D51/44C21D1/18
Inventor 张海峰经正霞冯吉建邓家爱吴厚金
Owner NANJING DUBLE METAL EQUIP ENG