Method for preparing CuTi alloy material by vacuum induction melting

Abstract

The invention discloses a method for preparing a CuTi alloy material by vacuum induction melting. The method specifically comprises the following steps: matching 3.6% of Ti and 96.4% of Cu in percentage by weight, adding Ti in the form of an intermediate alloy, arranging an insulated riser at the upper part of a steel die during loading, wrapping the upper edge of the outer wall of the steel die with insulation cotton, mounting an electrolytic copper plate first, inserting the intermediate alloy at the upper part of the electrolytic copper plate, closing a furnace cover, starting a Roots pumpwhen P is smaller than or equal to -0.1 MPa by a vacuum gauge, switching on a composite vacuum gauge, and making preparation for heating when low vacuum is 10 Pa; performing melting according to powergradient, carrying out casting first slowly, then quickly and then slowly, rotating a potentiometer to a 0 position after casting, and carrying out discharging, cooling and demolding. The method forpreparing a CuTi alloy material by vacuum induction melting is more efficient, more environmentally friendly, lower in cost and suitable for wide promotion.

Description

technical field [0001] The invention relates to the technical field of CuTi alloy preparation, in particular to a preparation method of vacuum induction melting CuTi alloy material. Background technique [0002] Copper-titanium is a high-strength, high-elastic, conductive copper alloy. Its physical properties are comparable to those of aging-strengthened representative beryllium-copper alloys, and its high-temperature performance and stress relaxation resistance are better than those of beryllium-copper alloys. Although beryllium copper itself is non-toxic, it will emit invisible toxic gases during smelting, thermal processing, and heat treatment, which will endanger human health. Therefore, copper-titanium alloy will replace beryllium-copper alloy in the application of electrical and electronic industries, such as the preparation of high-strength springs, electrical contacts, and mobile phone buttons. [0003] Copper-titanium alloys are widely used in the electrical and el...

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Problems solved by technology

[0003] Copper-titanium alloys are widely used in the electrical and electronic industry. At present, there is no batch supply capacity in the market, and most of them are imported from abroad. At present, the methods of producing CuTi alloys at home and abroad include: vacuum arc melting method, mixed powder sintering method, electromagnetic levitation melting method, etc. The vacuum arc consumable smelting method is to make a certain proportion of copper powder and titanium sponge into the electrode, put it into the vacuum consumable furnace for melting, and pour it into the water-cooled copper mold after it is completely melted. This method is difficult to manufacture and the process is complicated. And it is easy to segregate, too fast cooling intensity can easily cause central shrinkage cavity and shrinkage porosity, and the cost is high

The mixed powder sintering method is to mix Cu powder and Ti powder evenly, and then press and form the mixture to obtain an alloy green body; the alloy green body is sintered in an inert gas atmosphere and then cooled out of the furnace. This method has a high gas content, The ingredients are not easy to control

[0004] The cost of these methods is relatively high, and some of them cannot be mass-produced. The present invention aims at the deficiencies in the prior art and provides a preparation method using vacuum induction melting

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