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Method for preparation of quick setting flat alloy welding wire

An alloy welding wire, flat technology, which is applied in the field of preparation of molten alloy direct spray casting flat alloy wire, can solve the problems of difficulty in controlling the shape and size of the welding wire, long processing procedures and production cycles, adverse effects on welding performance, etc., and achieve dimensional stability , shorten the processing technology, good effect of fatigue resistance

Inactive Publication Date: 2002-07-17
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flat welding wire prepared by this method is difficult to control the impurity content, which has an adverse effect on its welding performance
Due to the long process and many factors involved, it is difficult to control the outer dimensions of the welding wire
Moreover, some brittle alloys cannot even be made into flat welding wires of the required size, which limits the application of some solder alloys with excellent performance and low price in the precision welding industry.
At the same time, due to the long processing procedure and production cycle, the investment in equipment and workshops is large, so the cost is high

Method used

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  • Method for preparation of quick setting flat alloy welding wire
  • Method for preparation of quick setting flat alloy welding wire
  • Method for preparation of quick setting flat alloy welding wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] by Ag 5 Cu 65 sn 30 The ingredients are batched, smelted and cast into Ag using known techniques 5 Cu 65 sn 30 Welding wire alloy ingots.

[0032] The welding wire alloy ingot is packed into the crucible 6 of the flat alloy welding wire spray casting machine, the crucible is made of graphite, after the crucible gland 22 is covered, the distance from the nozzle 32 of the nozzle 9 to the roller surface of the cooling roller 10 is adjusted to be 0.4 mm , The spout of flow nozzle 9 is a circular spout, and the diameter of the circular spout is 0.6 millimeters, connects metal flexible pipe 1 and thermocouple and sleeve pipe 2 thereof etc. Cover the furnace top cover 29 and install the collection tube 28, after opening the electromagnetic valve 20, start the mechanical pump and the diffusion pump 15 in turn, so that the vacuum degree of the vacuum chamber 11 and the crucible 6 reaches 10 -4 Torr is 1.33×10 -2 Pa, and then fill the crucible 6 and the vacuum chamber 11 w...

Embodiment 2

[0034] Its method of operation and equipment are basically the same as embodiment 1, only difference is that AlSi 12.6 The flat alloy ingot is used as the raw material, and the welding wire alloy does not contain medium and high vapor pressure elements. It does not need to be filled with protective gas during smelting, and it is carried out in a vacuum environment. AlSi 12.6 Welding wire alloy ingot is raw material, takes by weighing material weight 150 grams, makes the vacuum degree of vacuum chamber 11 and crucible 6 reach 10 -4 Torr, namely 1.33×10 -2 Pa, heated to 790°C with intermediate frequency induction, smelted at 790°C, and kept at a temperature of 790°C for 5 minutes. The spout of nozzle 9 is a circular spout, the diameter of the circular spout is 0.4mm, the back pressure suffered by the melt is 10KPa, the rotating speed of the cooling roll is 15 m / s, the inlet temperature of the cooling water is 15°C, and the roll is cleaned The speed of the machine is 6 m / s. T...

Embodiment 3

[0036] Its method of operation and equipment are basically the same as embodiment 2, the difference is that AlSi 1 Flat alloy ingots are used as raw materials. The flat welding wire alloy does not contain medium and high vapor pressure elements, with oAlSi 1 Welding wire alloy ingot is raw material, takes by weighing material weight 150 grams, makes the vacuum degree of vacuum chamber 11 and crucible 6 reach 10 -4 Torr, namely 1.33×10 -2 Pa, heated to 850°C with intermediate frequency induction, smelted at 850°C, and kept at a temperature of 850°C for 20 minutes, the distance from nozzle 32 of nozzle 9 to the roller surface of cooling roller 10 is 0.5 mm, The nozzle 32 of the nozzle 9 is a circular nozzle, the diameter of the circular nozzle is 0.6 mm, the back pressure of the melt is 14KPa, the rotating speed of the cooling roller 10 is 12 m / s, and the rotating speed of the cleaning roller is 8 m / s . The obtained flat alloy welding wire has a cross-sectional size of 0.045...

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Abstract

A process for preparing the quickly setting flat welding alloy wire used precise welding in electronic industry includes such technological steps as smelting raw materials in vacum or inert gas atmosphere, keeping the temp, passing inert gas into crucible to apply 2-1000 KPa to molten alloy,and forcing the molten alloy to flow via nozzle onto the surface of cooling roller rotating in vacuum chamber. Its advantages are excellent performance of obtained welding alloy wire, shorter productive route and period and low cost.

Description

1. Technical field [0001] The invention relates to a preparation method for directly spray-casting flat alloy wires from molten alloys. This is a method particularly suitable for preparing flat alloy wires for precision welding in the electronics industry. 2. Background technology [0002] Chinese patent document CN1178144A reports a method for manufacturing a wire made of a metal material with a rectangular cross-section. The method comprises at least one rolling stage and at least one heat treatment to produce a sheet metal having a thickness equal to the first dimension of the cross-section of the obtained wire, the structure and mechanical properties of which correspond to the predetermined structure and predetermined The mechanical properties of the wire are cut along a number of longitudinal parallel tangents so that the spacing between the cuts of two adjacent lines is equal to the second dimension of the wire. This method can also be used to prepare wire for weldin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/06B23K35/40
Inventor 朱学新张少明徐柱天李永伟贺会军石力开
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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