A short-flow forming process for high-tin bronze wire

A technology of high-tin bronze and forming process, which is applied in the field of short-process forming process of high-tin bronze wire, can solve the problems of difficult processing of high-tin bronze and low production efficiency, and achieve reduction of processing passes, low production cost and high efficiency high effect

Inactive Publication Date: 2018-06-29
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a short-flow process for high-tin bronze alloy wire, which can solve the problems that high-tin bronze is difficult to process and the production efficiency is not high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: φ1mm Sn content is the tin bronze wire material forming process of 8.5%wt

[0015] The tin bronze (Sn content is 8.5%wt) wire billet is prepared by horizontal continuous casting method, the temperature of the molten metal is controlled at 1100°C during casting, and the diameter of the billet is φ10mm; The amount is gradually increased, the maximum temperature in the deformation zone is set to 650°C, the drawing speed is set to 1mm / s, the distance between the cold and heat sources is 12mm, water cooling is adopted, the heating zone is protected by nitrogen, and it is drawn to φ2mm through multiple passes Wire material; the surface of the wire material is cleaned with dilute nitric acid; the tin bronze wire material after cleaning is drawn to φ1mm by multiple passes, and the deformation amount of each pass is 10-25%. Annealing treatment under the protection of hydrogen for 0.5h.

Embodiment 2

[0016] Embodiment 2: φ0.8mm Sn content is the tin bronze wire material forming process of 13%wt

[0017] The tin bronze wire billet with Sn content of 13%wt is prepared by horizontal continuous casting method, the temperature of molten metal is controlled at 1060°C during casting, and the diameter of billet is φ10mm; Gradually increase, the maximum temperature in the deformation zone is set to 650°C, the drawing speed is set to 0.7mm / s, the distance between the cold and heat sources is 12mm, water cooling is adopted, the heating zone is protected by nitrogen gas, and drawn into φ1 through multiple passes .8mm wire; the surface of the wire is cleaned with dilute nitric acid; the cleaned tin bronze wire is drawn to φ0.8mm through multiple passes, and the deformation of each pass is 10-25%. When the cold deformation reaches 60%, the Annealed at 570°C / 0.5h under the protection of hydrogen.

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Abstract

The invention discloses a short-process high-tin bronze wire material forming technology. The technology comprises the steps of preparing a high-tin bronze (8-15% wt) wire blank through a horizontal continuous casting method; dielessly drawing the casted wire blank into a wire material, wherein the single-gate deformation is 20-60%, the maximum temperature of a deformation zone is controlled to be 550-750 DEG C, the drawing speed is 0.5-10 mm / s,and the distance between a cold source and a heat source is 10-40 mm; pickling and mechanically scrubbing the surface of the dielessly drawn wire material; drawing the wire material into a microwire, wherein the single-gate deformation is 10-25%, an oil-lubricating mode is adopted, when the cold deformation is 50-59%, annealing treatment is adopted, the annealing temperature is 500-650 DEG C, and the annealing time is 0.2-1 hour.

Description

technical field [0001] The invention relates to a short-flow forming process of high-tin bronze wire with a Sn content of 8-15%wt. Background technique [0002] With the advantages of low resistivity, high electromigration life and connection reliability, tin bronze has great application potential in the field of connection between large-scale integrated circuits and chips. Due to the serious segregation of the high-tin bronze alloy and the appearance of δ phase (solid solution based on the compound Cu31Sn8) in the cast structure, the high-tin bronze alloy material is hard and brittle and difficult to process. So far, the main production method of high-tin bronze wire and wire rod is casting → hot extrusion → cold rolling into wire (Xiao Aiying et al., Mining and Metallurgy Engineering, 1981 (4), 35-41), the production process of this method is relatively Long, equipment investment is big; And spray deposition→rolling method (Wang Xiaofeng etc., a kind of preparation method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/045C22F1/08C22F1/02B21C1/02
CPCB21C1/02B22D11/005B22D11/045C22F1/02C22F1/08
Inventor 罗奕兵戴晓元彭伟杰
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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