Method for preparing high-bonding-strength pure-molybdenum composite board through hot explosive welding
A technology combining strength and composite plates, applied in welding equipment, non-electric welding equipment, welding/welding/cutting items, etc., can solve the problems of restricting the application of explosive welding, easy to generate cracks, etc., to achieve simple structure, eliminate cracks, easy to operate Effect
Inactive Publication Date: 2015-07-01
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
However, due to the low-temperature brittleness of molybdenum metal, it is very easy to produce cracks under explosive loading, which seriously limits the application of explosive welding in high melting point metal welding.
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[0022] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0023] The invention provides a method for preparing a high bonding strength pure molybdenum composite plate by thermal explosion welding. The purpose is to realize large-area welding of thicker (greater than 1mm) pure molybdenum plates, mainly through the combination of explosive welding and high temperature preheating. Among them, high-temperature preheating is used to improve the toughness and ductility of the molybdenum plate to eliminate cracks caused by impact. attached figure 1 It is a structural layout diagram of the present invention, and the concrete steps are as follows:
[0024] Step 1. Place the electric heating plate 6 on a flat wooden board. The purpose of placing the electric heating plate 6 on the wooden board is to reduce the heat loss of the electric heating plate 6 when it is working. After the upper and lower surfaces of the pure mol...
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The invention discloses a method for preparing a high-bonding-strength pure-molybdenum composite board through hot explosive welding, the pure-molybdenum composite board with the large thickness can be prepared, the prepared composite material is free of cracks, and the high bonding strength is achieved. The method comprises the steps that firstly, the pure-molybdenum board serves as a base plate, and the base plate is arranged on an electric heating plate; secondly, other metal plates serve as covering plates, the covering plates are arranged on the base plate in parallel through supporting articles, gaps are reserved between the base plate and the covering plates, and other metal is greatly different from the pure molybdenum in melting point and brittleness; thirdly, the surfaces of the covering plates are covered with equal-thickness explosive, the explosive laying size is the same as the size of the covering plates, and the size of the explosive laying size and the covering plates is larger than that of the base plate; fourthly, the base plate is heated through electrification of the electric heating plate; fifthly, after the base plate reaches the preset temperature, the explosive is detonated through a detonator, explosive welding is finished, and the high-bonding-strength pure-molybdenum composite board is prepared.
Description
technical field [0001] The invention relates to the field of composite materials, in particular to a method for preparing a high bonding strength pure molybdenum composite plate by thermal explosion welding. Background technique [0002] Metal molybdenum, because of its high hardness, high strength, high melting point, high specific strength at high temperature, good thermal stability, and good thermal conductivity, has been widely used in industrial production such as aerospace, nuclear industry, and electronics industry. [0003] In engineering practice, a single material is difficult to meet the requirements of use, and it is urgent to combine different materials to expand the application of molybdenum metal. Due to the low-temperature brittleness and poor high-temperature oxidation resistance of molybdenum, there are many problems in the application of conventional welding methods (such as e-book welding, argon arc welding, laser welding, etc.). For example, metal molyb...
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IPC IPC(8): B23K20/08B23K20/24
CPCB23K20/08B23K20/24B23K2103/18
Inventor 陈鹏万周强冯健锐戴开达安二峰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY