A method for preparing copper-tungsten composite contacts using copper-tungsten mixed powder 3D printing

Abstract

The invention discloses a method for preparing a copper-tungsten composite contact by using copper-tungsten mixed powder 3D printing, which mainly includes the following steps: preparation of copper powder and tungsten powder, preparation of copper-tungsten mixed powder, 3D printing, and final treatment of samples. In the method, the specific method of copper-tungsten composite contact is to connect and print copper-tungsten parts on the stamped copper parts, which can save manufacturing costs, and the printed parts and composite interface are fine and free of holes, and the printed copper-tungsten end parts are dense and uniform in composition , excellent performance, and at the same time, this method supports personalized customization and small batch production, which just fits the market development trend of continuous reduction in product cost and continuous improvement in performance and appearance.

Description

technical field [0001] The invention relates to the technical field of manufacturing products from metal powder, in particular to a method for preparing copper-tungsten composite contacts by 3D printing using copper-tungsten mixed powder. Background technique [0002] CuW material is widely used. It is often used in the electrical contact industry of power switches, aerospace rocket nozzles and heat dissipation materials for semiconductor integrated circuit chips, especially as heat dissipation materials for chips. It has high thermal conductivity and low expansion characteristics. is widely adopted. [0003] With more and more new production technologies pouring into the market, the current traditional processing methods can no longer keep up with the complex and miniaturized needs derived from social development, which requires us to introduce advanced production methods such as arc melting and 3D printing. Technology, early development, service market. [0004] 3D print...

AI Technical Summary

Problems solved by technology

[0003] With more and more new production technologies pouring into the market, the current traditional processing methods can no longer keep up with the complex and miniaturized needs derived from social development, which requires us to introduce advanced production methods such as arc melting and 3D printing. technology, develop early, serve the market

[0004] 3D printing technology was originally called rapid prototyping technology or rapid prototyping manufacturing technology, which is based on modern CAD / CAM technology, mechanical engineering, layered manufacturing technology, laser technology, computer numerical control technology, precision servo drive technology and new material technology, developed Advanced manufacturing technology, which is based on a computer three-dimensional digital model, is decomposed into multi-layer plane slices by software, and then the CNC forming system uses laser beams, hot-melt nozzles, etc. to layer and bond bondable materials layer by layer, and finally superimpose and make products , the traditional welding method requires solder and the brazing rate is always kept between 80-95%, and if 3D is used to form directly on the surface of the copper part, then the composite degree of the part is 100% and no solder is required; traditional processing The composition ratio of the method cannot be precisely controlled, but the products processed by 3D printing do not have segregation

[0005] The current copper-tungsten composite contacts all want to realize the controllability of copper-tungsten components through 3D printing, and expand the processing market of complex copper-tungsten parts. However, in terms of composition control, the scope is only controllable, and the composition is not precise. In addition, it has not considered the use of 3D printing technology to optimize the welding with copper base in the traditional processing method, which leads to the high manufacturing cost of the current copper-tungsten composite contact, and the comprehensive performance of the prepared copper-tungsten composite contact Low, low brazing rate, defects in composite sections, etc.