Method for welding chromated nickel austenitic stainless steel
An austenitic stainless steel, welding method technology, applied in welding equipment, welding/welding/cutting items, arc welding equipment, etc. Deformation, bubble prevention, moisture reduction effect
Active Publication Date: 2014-06-25
THE SIXTH CONSTR CO LTD OF CHINA NAT CHEM ENG
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[0002] With the development of my country's economy and the continuous improvement of people's living standards, chromium-nickel austenitic stainless steel is widely welcomed by people because of its good corrosion resistance, high hardness and high mechanical strength. Chromium-nickel austenitic stainless steel is mainly used in bridges , roads, etc., but chrome-nickel austenitic stainless steel is easy to deform when welding, and bubbles are easy to form at the welding place, causing the welding place to be brittle and easy to break
This brings great security risks to construction projects.
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[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.
[0017] Such as figure 1 As shown, the invention provides a welding method for chromium-nickel austenitic stainless steel, comprising:
[0018] Step 1. Before welding 3 to 5 hours, wipe the welding surface of austenitic stainless steel with acetone, and then wipe the welding surface of austenitic stainless steel with sulfuric acid with a concentration of 0.5mol / L;
[0019] Step 2. 5 to 7 hours before welding, place ERNiCrFe-6 nickel-based welding wire and ERNiCrMo-3 nickel-chromium-molybdenum welding wire in a drying oven at a temperature of 100°C for 3 hours, and then put ERNiCrFe-6 nickel-based welding wire and ERNiCrMo- 3 The nickel-chromium-molybdenum welding wire is stored in the box body, the box body is filled with silica desiccant, and the box body is sealed;
[0020...
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The invention discloses a method for welding chromated nickel austenitic stainless steel. The method comprises the steps that a welding face is wiped through acetone and vitriol; ERNiCrFe-6 nickel base welding wires and ERNiCrMo-3 nickel chrome molybdenum welding wires are placed in a drying box with the temperature being 100 DEG C and then are stored in a case, the case is filled with a silicon dioxide drying agent, and the case is sealed; argon serves as a shielding gas, a fireproof blanket winds the austenitic stainless steel, the austenitic stainless steel is welded for the first time through the ERNiCrFe-6 nickel base welding wires, the austenitic stainless steel is welded for the second time through the ERNiCrMo-3 nickel chrome molybdenum welding wires, the gas is cooled, and when the temperature at the welding position of the austenitic stainless steel is equal to or smaller than 200 DEG C, the fireproof blanket is dismounted. The method is simple, deformation at the welding position of the chromated nickel austenitic stainless steel can be effectively reduced, the strength of the welding position can be enhanced, and the problems of chrome lacking and nickel lacking at the welding position of the chromated nickel austenite are solved.
Description
technical field [0001] The invention relates to a welding method for chromium-nickel austenitic stainless steel. Background technique [0002] With the development of my country's economy and the continuous improvement of people's living standards, chromium-nickel austenitic stainless steel is widely welcomed by people because of its good corrosion resistance, high hardness and high mechanical strength. Chromium-nickel austenitic stainless steel is mainly used in bridges , roads, etc., but chrome-nickel austenitic stainless steel is easily deformed during welding, and bubbles are easy to form at the weld, making the weld brittle and easy to break. This has brought great potential safety hazards for construction projects. Contents of the invention [0003] Aiming at the problems existing in the current welding process of chromium-nickel austenitic stainless steel, the invention designs and develops a welding method of chromium-nickel austenitic stainless steel. [0004] Th...
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Patent Timeline
Login to View More IPC IPC(8): B23K9/16B23K9/235B23K9/23
CPCB23K9/16B23K9/235B23K31/12B23K2103/04
Inventor 袁莉尹厚云韩菊
Owner THE SIXTH CONSTR CO LTD OF CHINA NAT CHEM ENG