Manufacturing method of composite steel plate
A composite steel plate and manufacturing method technology, applied in the direction of manufacturing tools, chemical instruments and methods, non-electric welding equipment, etc., can solve the problems of stainless steel surface corrosion, liquid magnesium leakage, potential safety hazards, etc., and achieve the goal of reducing soup leakage and improving service life Effect
Active Publication Date: 2014-02-26
太原钢铁(集团)有限公司
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Problems solved by technology
[0002] At present, in the smelting process of magnesium and magnesium alloys, in order to ensure the purity of magnesium and reduce the replacement reaction between magnesium and the alloy in steel, a composite steel plate for magnesium crucible is used, and Q245R is used as the lining. Hot stainless steel is used to improve the service life of the crucible, but sulfur oxides are released from the mold slag during the smelting process, and the stainless steel surface is corroded under the action of high temperature. Due to the poor adhesion between the oxide film and the substrate, the oxide film is brittle Shedding, resulting in thinning of the stainless steel, which loses its protective properties against the lining
Therefore, under the action of high temperature in the tank body during smelting, local corrosion occurs on the surface of the stainless steel, causing liquid magnesium to leak, causing great safety hazards to production, and shortening the service life of the tank body
Method used
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[0036] The specific implementation of the composite steel plate and its manufacturing method will be described in detail below in conjunction with the examples and accompanying drawings, but the specific implementation of the composite steel plate and its manufacturing method are not limited to the following examples.
[0037] Example of composite steel plate
[0038] This embodiment is composed of the Q245R base plate and the doubler plate welded together in the national standard GB713. The length of the finished base plate is 6050mm, the width is 1050mm, the thickness of the base plate is 26mm, and the length and width of the doubler plate are equal to those of the base plate. The length is also 6050mm, the width is also 1050mm, and the thickness of the doubler is 4mm; it is characterized in that: the doubler is NAR-305B stainless steel of Japanese stainless steel standard JIS G 4305.
[0039] Example of manufacturing method
[0040] What this example made was the clad stee...
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Abstract
The invention relates to a composite steel plate and a manufacturing method for same. The composite steel plate comprises a Q245R base plate and an NAR-305B composite plate. The manufacturing method includes the successive steps: I, assembling the base plate and the composite plate in a matched manner; II, grinding a joint surface of the surface base plate so that surface roughness is no more than Ra 25 micrometers; III, laying explosion welding explosives on the composite plate, igniting the explosives, and welding the base plate together with the composite plate by means of explosion; IV, welding unwelded points by means of surface repair welding; V, performing heat treatment at the temperature of 900-920 DEG C and preserving heat for 15-20 minutes; VI, cutting the composite steel plate into the size of a finished composite steel plate; VII, testing mechanical properties of the composite steel plate according to GB / T6396-2008; VIII, performing 100% ultrasonic flaw detection for the composite steel plate according to NB / T47002-2009; and IX, grinding the surface of the composite steel plate so that surface roughness is no more than Ra 2 micrometers. The composite steel plate manufactured by the manufacturing method for the composite steel plate is corrosion-resistant and long in service life.
Description
technical field [0001] The invention relates to a composite steel plate and a manufacturing method thereof, in particular to a composite steel plate for a magnesium crucible and a manufacturing method thereof. Background technique [0002] At present, in the smelting process of magnesium and magnesium alloys, in order to ensure the purity of magnesium and reduce the replacement reaction between magnesium and the alloy in steel, a composite steel plate for magnesium crucible is used, and Q245R is used as the lining. Hot stainless steel is used to improve the service life of the crucible, but sulfur oxides are released from the mold slag during the smelting process, and the stainless steel surface is corroded under the action of high temperature. Due to the poor adhesion between the oxide film and the substrate, the oxide film is brittle Shedding causes the stainless steel to thin and lose its protective properties against the lining. Therefore, under the action of high tempe...
Claims
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IPC IPC(8): B23P15/00B23K20/08B32B15/01B32B15/18
Inventor 卫世杰
Owner 太原钢铁(集团)有限公司
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