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Ultrasonic-assisted semi-solid welding method

A technology of ultrasonic assistance and welding method, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problem that the quality of the intermediate layer and the end face cannot meet the requirements, and achieve finishing processing and surface strengthening, and high production efficiency. , good welding conditions

Inactive Publication Date: 2016-04-27
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with ordinary brazing technology, semi-solid diffusion brazing technology has many advantages such as good high temperature resistance, high mechanical properties and strong self-cleaning ability. At present, it is mostly used for the connection of advanced materials, but the performance requirements for some welded structures are relatively high. In the high field, there are situations where the quality of the middle layer and the end face cannot meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Both the base material and the solder are selected from aluminum alloy

[0035] Step 1: Use ultrasonic to clean the surface of the aluminum alloy base metal to be welded. The ultrasonic power of the ultrasonic wave is 20w, and the cleaning time is 10min. Then put the two aluminum alloy sheets to be welded together;

[0036] Step 2: Melting the aluminum alloy solder in a metal melting furnace at a melting temperature of 700°C;

[0037] Step 3: applying semi-solid stirring during the cooling process of the aluminum alloy solder to make it have a two-phase structure of spherical grains and liquid phase;

[0038] Step 4: When the aluminum alloy solder is cooled to 620°C, pour it into a constant temperature injector, and keep it warm at 620°C, so that the liquid phase ratio of the solder is 50%;

[0039] Step 5: Turn on the in-situ induction heater, heat the aluminum alloy base material at the initial position of the area to be welded to 450°C, and keep it for 5s...

Embodiment 2

[0042] Example 2: Magnesium alloy is selected for base metal and solder

[0043]Step 1: Clean the surface of the magnesium alloy base material to be welded with ultrasonic waves, the ultrasonic power of the ultrasonic waves is 15w, and the cleaning time is 15min, and then put together the two magnesium alloy sheets to be welded;

[0044] Step 2: Melting the magnesium alloy solder in a metal melting furnace at a melting temperature of 710°C;

[0045] Step 3: applying semi-solid stirring during the cooling process of the magnesium alloy solder to make it have a two-phase structure of spherical grains and liquid phase;

[0046] Step 4: When the magnesium alloy solder is cooled to 600°C, pour it into a constant temperature injector, and keep it warm at 600°C, so that the liquid phase ratio of the solder is 60%;

[0047] Step 5: Turn on the in-situ induction heater, heat the magnesium alloy base material at the initial position of the area to be welded to 450°C, and keep it for 5s...

Embodiment 3

[0050] Example 3: SiCp / Al composite material is selected for base metal and solder

[0051] Step 1: Clean the surface of the SiCp / Al base metal to be welded with ultrasonic waves, the ultrasonic power of the ultrasonic waves is 20w, and the cleaning time is 10min, and then put together the two SiCp / Al sheets to be welded;

[0052] Step 2: Melting the SiCp / Al solder in a metal melting furnace at a melting temperature of 720°C;

[0053] Step 3: Apply semi-solid stirring during the cooling process of SiCp / Al solder to make it have a two-phase structure of spherical grains and liquid phase;

[0054] Step 4: When the SiCp / Al solder is cooled to 630°C, pour it into a constant temperature injector and keep it warm at 630°C so that the liquid phase rate of the solder is 60%;

[0055] Step 5: Turn on the in-situ induction heater, heat the SiCp / Al base material at the initial position of the area to be welded to 450°C, and keep it for 5s, then contact the ultrasonic vibration head with...

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Abstract

The invention discloses an ultrasonic-assisted semi-solid welding method. The ultrasonic-assisted semi-solid welding method includes steps of cleaning base metal by the aid of ultrasonic waves; fusing and cooling welding flux; adding semi-solid into the welding flux in cooling procedures and stirring the semi-solid; cooling the welding flux until the temperature of the welding flux reaches 600-630 DEG C, and then pouring the welding flux into a constant-temperature injecting machine to keep the temperature of the welding flux constant; heating the welding base metal and carrying out ultrasonic-assisted vibration on the welding base metal; opening a discharge outlet of the constant-temperature injecting machine to start to inject the welding flux; shifting an in-situ induction heater and the constant-temperature injecting machine by 20 mm, then applying specific pressures on original positions of welding seams by the aid of rolling pressure heads, keeping the rolling pressure heads to move towards non-welded regions along the welding seams at the speeds identical to the speeds of the in-situ induction heater and the constant-temperature injecting machine, keeping the specific pressures unchanged in moving procedures and ultimately obtaining welded components. The components which are high in mechanical property and good in service performance can be obtained by the aid of the ultrasonic-assisted semi-solid welding method by means of welding, and the ultrasonic-assisted semi-solid welding method has the advantages of wide applicable material ranges, high production efficiency, good welding conditions and the like. Besides, the ultrasonic-assisted semi-solid welding method has great development prospects and application spaces.

Description

technical field [0001] The invention relates to a welding method, in particular to an ultrasonic-assisted semi-solid welding method. Background technique [0002] Semi-solid connection is developed on the basis of semi-solid processing technology. It is a method of connecting metals or alloys in the temperature range between solidus and liquidus. Semi-solid diffusion brazing technology means that the base metal is above the recrystallization temperature, and the filling solder is within the semi-solid temperature range. Through the mutual diffusion of the base metal and solder interface, a eutectic composition with a low melting point is formed and continues to diffuse, and The subsequent homogenization and recrystallization process finally forms a weld joint that is uniform and consistent with the composition of the base metal. Compared with ordinary brazing technology, semi-solid diffusion brazing technology has many advantages such as good high temperature resistance, hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/14B23K1/06B23K1/20
CPCB23K1/06B23K1/14B23K1/20
Inventor 陈刚赵洪运韩柳娜宋晓国冯吉才
Owner HARBIN INST OF TECH AT WEIHAI
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