Method for plating surfaces of Ni-Cr alloy wires with zinc at low temperature

A technology of alloy wire and ni-cr, which is applied in metal processing equipment, welding/welding/cutting items, manufacturing tools, etc., can solve the problems that the film removal method is difficult to work, the crystal is hard, and the reliability is low, so as to improve the performance of the joint , good metallurgical bonding, the effect of improving strength and reliability

Active Publication Date: 2016-05-25
深圳市昌龙盛机电技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a layer of oxide film on the surface of Ni-Cr alloy wire, its main component is Cr?O?, which is insoluble in water, alcohol, acid and alkali, and is extremely stable to light, atmosphere, high temperature and corrosive gases, and the crystal is hard , the method of removing the film by chemical dissolution of a single flux used in general brazing methods is difficult to work
Therefore also cause the brazing method of prior art all can not make tin and Ni-Cr alloy wire form good metallurgical bonding, reliability is low

Method used

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  • Method for plating surfaces of Ni-Cr alloy wires with zinc at low temperature
  • Method for plating surfaces of Ni-Cr alloy wires with zinc at low temperature
  • Method for plating surfaces of Ni-Cr alloy wires with zinc at low temperature

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Embodiment 1

[0030] The invention discloses a process method for low-temperature tin plating on the surface of Ni-Cr alloy wire, using Sn-10Pb as solder.

[0031] Such as figure 1 As shown, melt the Sn-10Pb solder 1 in the tin melting furnace 4, so that the solder liquid level is enough to immerse the ultrasonic welding head, and at the same time, it is convenient to hold the Ni-Cr alloy wire 2 and extend into the solder liquid surface to carry out welding; Sn- The melting point of 10Pb solder 1 is about 183°C, then adjust the temperature of the tin melting furnace 4 to 230°C, and set the parameters of the ultrasonic generator at the same time, so that the vibration time of the ultrasonic welding head is 8 seconds, the vibration frequency is 25KHz, and the amplitude is 20μm; KBrO 3 - the hydrochloric acid mixed solution is coated on the welding surface of the Ni-Cr alloy wire 2, the KBrO 3 -in a mixed solution of hydrochloric acid, KBrO 3 The percentage by mass is 0.1%; the ultrasonic w...

Embodiment 2

[0034] A process method for low-temperature tin plating on the surface of Ni-Cr alloy wire, using Sn-9Bi as solder.

[0035] Such as figure 1 As shown, melt the Sn-9Bi solder 1 in the tin melting furnace 4, so that the solder liquid level is enough to immerse the ultrasonic welding head, and at the same time, it is convenient to hold the Ni-Cr alloy wire 2 and extend into the following solder liquid level for welding; then adjust The temperature of the tin melting furnace 4 reaches 180° C., and the melting point of the Sn-9Bi solder 1 is about 145° C. At the same time, the parameters of the ultrasonic generator are set so that the ultrasonic welding head vibrates for 5 seconds, the vibration frequency is 20 KHz, and the amplitude is 10 μm; KBrO 3 - the hydrochloric acid mixed solution is coated on the welding surface of the Ni-Cr alloy wire 2, the KBrO 3 -in a mixed solution of hydrochloric acid, KBrO 3 The percentage by mass is 5%; the ultrasonic welding head is immersed i...

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Abstract

The invention provides a method for plating the surfaces of Ni-Cr alloy wires with zinc at a low temperature. The method includes the following steps of melting zinc base brazing filler metal in a zinc melting device, adjusting the temperature in the zinc melting device till the zinc base brazing filler metal is molten and the brazing temperature is 120-250 DEG C, conducting chemical dissolution on welding surfaces of the Ni-Cr alloy wires, soaking the Ni-Cr alloy wires and an ultrasonic welding head of an ultrasonic welding device in the molten zinc base brazing filler metal so that the Ni-Cr alloy wires can be perpendicular to an ultrasonic welding rod of an ultrasonic welding device and make contact with the bottom of the ultrasonic welding rod, starting an ultrasonic generator of the ultrasonic welding device, and taking out the Ni-Cr alloy wires after ultrasonic vibration is conducted for 2-60 seconds to complete the zinc plating process. By means of the technical scheme, surface chemical dissolution is combined with ultrasonic cavitation treatment, quite good alloy combination between Sn base welding flux and the Ni-Cr alloy wires is achieved at a low temperature, and welding reliability is improved.

Description

technical field [0001] The invention relates to a method for tinning a metal surface, in particular to a method for low-temperature tinning on the surface of a Ni-Cr alloy wire. Background technique [0002] Nickel-chromium alloy has many advantages such as high resistivity, good corrosion resistance, excellent high-temperature mechanical properties, strong plasticity and high reliability. In industry, nickel-chromium alloys are used to manufacture electric heating elements such as electric furnaces and electric soldering irons, and resistive elements such as potentiometers and sliding rheostats. Ni-Cr resistance wire is usually used in the manufacture of potentiometers. It is made of nickel-chromium alloy and impurity alloys such as iron, aluminum, silicon, carbon, and sulfur. It is wound on Cu coated with an organic insulating layer. core surface and requires a metallurgical connection to the Al contacts. Since there is a polymer insulating layer between the Cu core and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/00B23K1/08B23K1/20B23K103/18
CPCB23K1/0008B23K1/08B23K1/206B23K2103/18
Inventor 肖勇张志恒盛玮东腾用进
Owner 深圳市昌龙盛机电技术有限公司
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