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Preparation method of coated alloy wire

A technology of alloy wire and cladding, which is applied in the field of preparation of cladding alloy wire, can solve problems such as poor passability, uneven distribution, and excessive carbide particle size, and achieve the effect of reducing hardness difference and improving elongation

Active Publication Date: 2020-09-22
JIANGSU ZHONGTIAN TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The improvement of the tensile strength of the existing aluminum-clad Invar wire is mainly through the adjustment of the chemical composition system of the wire rod and the subsequent cold work hardening. After the adjustment of the chemical composition of the wire rod, especially the adjustment of V, Cr, Mo and other elements, the resulting Large-sized carbide particles, and non-dispersed distribution, affect the wire rod's passability, and are prone to wire breakage during the drawing process
Subsequent cold work hardening with high compression rate can effectively increase the tensile strength of aluminum-clad invar, but it also brings about a sharp drop in the elongation of aluminum-clad invar, which restricts the preparation and application of double-capacity wire
[0004] At present, the Invar wire is mainly heat-treated through pit furnaces and cover furnaces, followed by aluminum cladding and bimetallic continuous drawing processes, in which the passability of the material is poor, and the carbide particle size is too large and unevenly distributed , it is easy to cause wire breakage during the drawing process, and the final tensile strength and elongation of the aluminum-clad invar wire are low

Method used

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  • Preparation method of coated alloy wire
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  • Preparation method of coated alloy wire

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preparation example Construction

[0032] see figure 1 , the present application relates to a preparation method of clad alloy wire, comprising the following steps:

[0033] Step S1, performing continuous heat treatment on the alloy wire rod, and then obtaining the alloy core material through surface treatment; wherein, the heating temperature of the continuous heat treatment is 680-820°C, the wire speed is 1.5-5m / min, and the alloy wire rod includes Invar wire rod or One of the iron-nickel alloy wire rods.

[0034] The main components of existing invar wire rods or iron-nickel alloy wire rods are Ni, Mo, V, Cr, C and other main chemical elements, and the structure, tensile strength, and linear expansion of invar materials are optimized by adjusting the chemical composition ratio. coefficient. In general Invar wire rod or iron-nickel alloy wire rod (such as 4J36, 4J38, etc.), the mass fraction of V element is between 0.4% and 1.2%, the mass fraction of Mo element is between 0.5% and 2.8%, and the mass fractio...

Embodiment 1

[0072] Invar wire rods with a diameter of 4.0 mm were sequentially processed on-line in a natural gas continuous heat treatment furnace, on-line abrasive belt polishing, and on-line 5 MPa high-pressure water washing to obtain Invar core materials. Among them, the heating temperature of the heat treatment furnace is 700°C, the running speed of the Invar wire rod is 3.6m / min, the strength of the Invar wire rod after treatment is 1120MPa, and the elongation is 12.2%; the mesh number of the abrasive belt is 120, and the rotation coefficient of the abrasive belt is is 0.6.

[0073]A uniformly coated aluminum layer is formed on the surface of the Invar core material by continuous extrusion cladding technology, and the cladding wire is formed. Wherein, the cladding temperature is 420° C., the cladding speed is 130 m / min, and the diameter of the cladding wire is 4.50 mm.

[0074] Calcium stearate was used as the lubricant to carry out 6-pass bimetal synchronous drawing on the coated ...

Embodiment 2

[0076] The 4J36 iron-nickel alloy wire rod with a diameter of 4.4mm was sequentially processed on-line in a natural gas continuous heat treatment furnace, on-line abrasive belt polishing and on-line 10MPa high-pressure water washing to obtain an iron-nickel alloy core material. Among them, the heating temperature of the heat treatment furnace is 720°C, the running speed of the iron-nickel alloy wire rod is 3.3m / min, the strength of the iron-nickel alloy wire rod after treatment is 1100MPa, and the elongation is 11.4%; the mesh number of the abrasive belt is 120, the belt rotation coefficient is 0.7.

[0077] A uniformly coated aluminum alloy layer is formed on the surface of the iron-nickel alloy core material by continuous extrusion cladding technology, and the cladding wire is formed. Wherein, the cladding temperature is 430° C., the cladding speed is 130 m / min, and the diameter of the cladding wire is 4.95 mm.

[0078] Sodium stearate was used as lubricant to carry out 6-p...

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Abstract

The invention provides a preparation method of a coated alloy wire. The preparation method comprises the following steps that an alloy steel wire rod is subjected to continuous heat treatment, and then surface treatment is carried out to obtain an alloy core material; the surface of the alloy core material is subjected to continuous extrusion coating to form the coated wire rod; and double metal is adopted to synchronously pull the coated wire rod to form the coated alloy wire. According to the preparation method of the coated alloy wire, a continuous heat treatment furnace is used for treating, the alloy steel wire rod with good matching of strength and elongation is obtained, then the binding force of the alloy core material and a coated material is improved by combining with the surfacetreatment, finally, the elongation of the coated alloy wire is improved by synchronously pulling the double metal, and the hardness difference of the cross section of the coated alloy wire is reduced.

Description

[0001] This application claims the priority of the Chinese patent application with the application number 201911136518.7 and the invention title "Preparation Method of Coated Alloy Wire" filed with the China Patent Office on November 19, 2019, the entire contents of which are incorporated by reference in this application . technical field [0002] The present application relates to the technical field of metal manufacturing, in particular to a preparation method of clad alloy wire. Background technique [0003] Aluminum-clad steel wire for electrical purposes, especially aluminum-clad Invar wire, is a bimetallic material composed of alloy steel wire rod and aluminum rod based on continuous extrusion coating technology. It has high strength, corrosion resistance, and low linear expansion. Coefficient and other characteristics, widely used in double-capacity overhead transmission and distribution lines. With the further improvement of the span and transmission capacity of tra...

Claims

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Application Information

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IPC IPC(8): B21C37/04C21D9/52
CPCB21C37/045C21D9/525B21C23/005B21C37/042B24B5/38B21C9/02B21C1/003C21D8/065C21D2251/02C21D1/42C21D1/74B24B21/006Y02P10/25
Inventor 王文辉李发才戴志成吴明埝郭宸轩何仓平谢书鸿薛济萍
Owner JIANGSU ZHONGTIAN TECH CO LTD
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