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Preparation method of AgCuTi alloy, preparation method of foil strip brazing filler of AgCuTi alloy, and products of AgCuTi alloy

An alloy and mixture technology, applied in the field of materials and alloy materials, can solve the problems of difficult-to-roll forming of high-quality foil strips, easy grain size growth, and reduced activity of brazing filler metals, and achieves low oxygen content, good mechanical properties, Size controllable effect

Active Publication Date: 2017-03-22
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to: for the existing AgCuTi alloy brazing material which is easy to segregate, the element Ti in it is easy to combine with oxygen, which may cause the activity of the brazing filler metal to decrease during sealing, and in the process of full alloying, the grain size is easy to Growth, holes and other microscopic defects are difficult to eliminate, and Ti elements can form Ag-Ti and Cu-Ti brittle phases with Ag and Cu, which is difficult to roll into high-quality foil strips. A preparation method for AgCuTi alloy is provided. , the preparation method of its foil strip brazing filler metal and its product

Method used

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  • Preparation method of AgCuTi alloy, preparation method of foil strip brazing filler of AgCuTi alloy, and products of AgCuTi alloy
  • Preparation method of AgCuTi alloy, preparation method of foil strip brazing filler of AgCuTi alloy, and products of AgCuTi alloy
  • Preparation method of AgCuTi alloy, preparation method of foil strip brazing filler of AgCuTi alloy, and products of AgCuTi alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1) The silver, copper and titanium elemental powders are mixed according to the weight percentage of 69.5:27.5:3 to obtain the first mixture. The first mixture was mixed with titanium balls and absolute ethanol in a mass ratio of 1:6:1, and then put into a stainless steel ball mill jar for ball milling; wherein, the particle size of the balls was 3 mm. After the ball mill tank is sealed, put it into a planetary ball mill for wet mixing, the tank speed is 100r / min, and the time is 2h; after grinding, firstly use a 200-mesh metal screen to separate the titanium balls from the slurry, After the slurry is precipitated and dried, silver-copper-titanium mixed powder is obtained.

[0047] 2) Put the silver-copper-titanium mixed powder obtained after grinding into a soft mold, and form it by cold isostatic pressing at a pressure of 120 MPa for 5 minutes to obtain a cold compact.

[0048] 3) Vacuum sinter the cold compact after cold isostatic pressing, sintering temperature: 60...

Embodiment 2

[0055] 1) The silver, copper and titanium elemental powders are mixed according to the weight percentage of 30.5:65.5:4 to obtain the first mixture. The first mixture was mixed with titanium balls and absolute ethanol in a mass ratio of 2:8:2, and then put into a stainless steel ball mill jar for ball milling; wherein, the particle size of the balls was 5 mm. After the ball mill tank is sealed, put it into a planetary ball mill for wet mixing, the tank speed is 200r / min, and the time is 8h; after grinding, firstly use a 200-mesh metal screen to separate the titanium balls from the slurry, After the slurry is precipitated and dried, silver-copper-titanium mixed powder is obtained.

[0056] 2) Put the silver-copper-titanium alloy mixed powder obtained after grinding into a soft mold, and form it by cold isostatic pressing at a pressure of 180 MPa for 10 minutes to obtain a cold compact.

[0057] 3) Vacuum sinter the cold compact after cold isostatic pressing, sintering temperat...

Embodiment 3

[0064] 1) The silver, copper and titanium elemental powders are mixed according to the weight percentage of 70.5:26:3.5 to obtain the first mixture. The first mixture was mixed with titanium balls and absolute ethanol in a mass ratio of 2:10:4, and then put into a stainless steel ball mill jar for ball milling; wherein, the particle size of the balls was 8 mm. After the ball mill tank is sealed, put it into a planetary ball mill for wet mixing, the tank speed is 300r / min, and the time is 10h; after grinding, first use a 200-mesh metal mesh screen to separate the titanium balls from the slurry, After the slurry is precipitated and dried, silver-copper-titanium mixed powder is obtained.

[0065] 2) Put the titanium alloy mixed powder obtained after grinding in step 1 into a soft mold, and form it by cold isostatic pressing at a pressure of 270 MPa for 60 minutes to obtain a cold compact.

[0066] 3) Vacuum pre-sintering of the cold compact after cold isostatic pressing, sinteri...

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Abstract

The invention discloses a preparation method of an AgCuTi alloy, a preparation method of a foil strip brazing filler of the AgCuTi alloy, and products of the AgCuTi alloy. The preparation method is used for solving problems in the prior art that segregation of conventional AgCuTi alloy is easily caused, element Ti is combined with oxygen, activity reducing of brazing filler may be caused in sealing, and in full alloying process, microdefects such as easily caused increasing of grain size and holes are difficult to eliminate, Ag-Ti and Cu-Ti brittle phases are formed from Ti element, and Ag and Cu, and high quality foil strips are difficult to form via rolling. According to the preparation method, vacuum presintering of a powder billet at low temperature is carried out, segregation is inhibited, and hot isostatic pressure medium temperature sintering is adopted, so that grain size and oxygen content are controlled effectively, high density alloy with excellent mechanical properties is obtained, and finally foil strip brazing filler is formed via a plurality of times of direct cold rolling. The preparation method is capable of satisfying requirements on high performance silver copper titanium foil strip brazing filler used in dissimilar material component sealing, is promising in application prospect, and is worthy of large scale popularization and application.

Description

technical field [0001] The invention relates to the field of materials, especially the field of alloy materials, and specifically relates to a preparation method of AgCuTi alloy, a preparation method of its foil strip solder and products thereof. Background technique [0002] Silver-copper solder has high welding joint strength, excellent electrical conductivity and corrosion resistance, medium temperature melting point and good wettability, so that it can braze all ferrous and non-ferrous metals except aluminum, magnesium and other low-melting point metals , has a wide range of applications. Among them, the AgCuTi alloy solder has a small wetting angle and has the best wettability to ceramics. It does not require complex metallization pretreatment on the ceramic surface, and can achieve successful one-time brazing of ceramics and ceramics, and ceramics and metal components. . Therefore, AgCuTi alloy solder has obtained a lot of experimental research, which has important p...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C5/08C22C9/00C22C30/02C22F1/14C22F1/08C22F1/00B23K35/40B23K35/14
CPCB23K35/0222B23K35/40C22C1/04C22C1/0425C22C1/0466C22C5/08C22C9/00C22C30/02C22F1/00C22F1/08C22F1/14
Inventor 程亮李强李启寿杨晓峰陈伟孙钊张天助杨勇龙亮
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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