Big thickness BFe30-1-1/35CrMo explosive welding high intensity high corrosion resistance composite board

Abstract

The invention provides a heavy section BFe30-1-1 / 35CrMo explosion welding high-strength high-anticorrosion composite plate. Firstly, the explosion speed of dynamite is controlled within about 800-1000m / s by the optimal design of dynamite formula. Secondly, by a principle of selecting the lower limit of the charging main parameter, the charging auxiliary parameters such as clearance and charging size of basic composite plate are reasonably designed, sand soil foundation added by water is selected and configured and the water content and density thereof are controlled, thus ensuring the once recombination rate of the heavy section BFe30-1-1 / 35CrMo explosion welding high-strength high-anticorrosion composite plate to achieve 100 percent and the adhesion strength thereof to achieve or even exceed the national standard, and avoiding the crack generation of the heavy section composite plate and high-strength basic plate during the explosion welding process. Finally, the subsequent crack of the composite pate is ensured not to be generated in the subsequent processing by the formulation of heat disposal parameters. The composite plate has ultra-high anticorrosion performance and extremely high high-temperature strength and anti-impact toughness.

Description

technical field [0001] The invention relates to a large-thickness BFe30-1-1 / 35CrMo explosion-welded high-strength and high-corrosion-resistant composite plate that uses the energy generated by the explosion of explosives as an energy source to form a firm solid-phase combination on the two metal surfaces to be welded. . It belongs to the technical field of explosive welding. Background technique [0002] Explosive welding technology and explosive composite materials have been widely used in various fields such as petroleum, chemical industry, shipbuilding, electric power, aviation, aerospace, salt production, alkali production, metallurgy, atomic energy, mining, transportation, and machinery manufacturing. [0003] At present, the thickness of the high-strength composite plate produced by the explosive welding method is generally less than 12 mm; the base plate is generally ordinary steel or container steel forgings, and high-strength alloy steel is rarely used. For the cl...

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Problems solved by technology

[0004] 1. Due to the thickness of the compound plate, the ultimate bending moment of the compound plate and the effective action distance of the explosion load are relatively large. If the existing charge parameters are used, the compound plate will also have large ripples or even appear due to the high explosion pressure. Local over-melting of the doubler plate is easy to produce low welding recombination rate

[0005] 2. Due to the influence of the unstable detonation section of the explosive, too thick doubler plates will also cause the unbonded zone of the composite plate at the initiation end to become longer; and due to the influence of boundary effects, the unbonded zone of the boundary effects on both sides and ends of the composite plate will also become longer. will increase

[0006] 3. The substrate 35CrMo is a high-carbon alloy steel, which is a highly brittle material. Due to its impact toughness (A k value) is too low, and the thickness of the doubler plate is greater than or equal to 12mm, the thickness of the charge will generate a large explosive load, so the substrate 35CrMo will be prone to cracks during the explosive welding process and the overall failure of the explosive welding

[0007] 4. If the heat treatment parameters and leveling process are unreasonable, BFe30-1-1 / 35CrMo explosively welded high-strength and high-corrosion-resistant composite plates will also produce secondary cracks in the subsequent heat treatment and leveling and other mechanical processing processes

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