Explosive welding method for large tool steel-steel composite plate

Abstract

The invention relates to an explosive welding method for a large tool steel-steel composite plate, and belongs to the technical field of explosive welding of metal composite plates. The method includes the following steps: step 1, mounting a base steel plate and a multi-layer tool steel plate by a parallel method; step 2, pressing a metal detonating plate against one side of the multi-layer tool steel plate, and taking the region of the detonating plate as an explosion region; step 3, completely sealing the upper surface of a joint, formed by the multi-layer tool steel plate and the detonatingplate, by a transparent adhesive tape; step 4, applying a butter layer on the upper surface of each of the multi-layer tool steel plate and the detonating plate; step 5, arranging explosives on the upper surfaces of the multi-layer tool steel plate and the detonating plate, and arranging a detonator for detonating the explosives into the detonating region formed by the detonating plate. The method has the advantages that high internal stress generated when high temperatures are conducted to the multi-layer tool steel plate during welding can be prevented, and the welding quality is improved;through the non-welding mode, the amount of labor is reduced, and the production efficiency of the composite plate is improved.

Description

technical field [0001] The invention relates to the technical field of explosive welding of metal composite plates, in particular to an explosive welding method for large-format tool steel-steel composite plates. Background technique [0002] Explosive welding is a special engineering welding technology. The metal composite material formed by welding can have the comprehensive physical properties and processing properties of a single metal material, and save a lot of precious metal materials in the case of equivalent applications, so that Significantly reduce costs. At present, explosive welding technology has been widely used in petrochemical, mechanical processing, metallurgy, aerospace, shipbuilding and other industrial fields. In hot rolling mills, hot rolling units, work rolls, wear-resistant sliders, slide plates, and archway linings are generally selected from tool steel-steel explosive composite plates. The working surface has high wear resistance and hardness, and ...

AI Technical Summary

Problems solved by technology

[0004] 1. The hardness of the tool steel is high, but it is brittle and has poor impact resistance. Under the high-speed impact load formed after the explosion of the explosive, it is easy to break and crack; when the base steel plate and the multi-layer tool steel plate are cut, they are also There will be cold work hardening, and the boundary is likely to have uneven hardness distribution on the entire area, which is also the cause of cracks;

[0005] 2. The detonation end is located in the composite area. In addition to being affected by the boundary effect, there is also a time period from the detonation to the stable detonation velocity of the explosive. In this period of time, the detonation velocity of the explosive cannot be stabilized. The acting pressure on the plate is small, so that the metal jet required for welding cannot be obtained between the bonding interface at the boundary

[0006] In order to solve the above-mentioned problems, solutions have been proposed in the prior art, such as the Chinese invention patent whose authorized announcement number is CN103639585B, which discloses a method for controlling the detonator area in the explosive compounding of thick clad zirconium / titanium / steel clad plates, The main point of the technical solution is to weld the detonating plate made of precious metal on the doubler plate to complete the detonation outside the composite area, but this will consume precious metal materials, resulting in a greatly increased production cost; During the process, due to heat conduction, the internal stress inside the clad plate will increase, and the thicker the clad steel plate, the longer the welding time will be, so the higher the heat accumulated inside the clad plate, the greater the internal stress. When the detonation is uneven, it will directly affect the welding quality of the composite plate; in addition, the welding method not only requires experienced welding personnel, but also takes a long time to weld, which affects the production efficiency of the explosive joint.

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