Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation process for improving bending forming of copper-tin alloy strip

A bending forming and preparation process technology is applied in the field of improving the preparation process of the bending forming of copper-tin alloy strips, and can solve the problems such as the inability to meet the use requirements of the connector support strength, the reduction of the bending formability of the material, the insufficient softening resistance, and the like. Excellent comprehensive performance indicators, improved heat resistance, and the effect of surface cleaning

Active Publication Date: 2022-05-27
中铝洛阳铜加工有限公司
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the tin content is below 0.2wt.%, the effect of strengthening the material by heat treatment is not obvious. It is necessary to improve the strength of the material through work hardening (hardness Hv≥128, tensile strength Rm≥430Mpa), but it will lead to bending formability of the material. Reduction (elongation A50≥2%), especially when the material thickness t meets 1.0mm≤t≤3.0mm, and the ratio of the bending radius R of 90° bending to the material thickness t, that is, R / t is less than 2.0, the problem of bending cracking occurs , has become one of the main factors limiting the wide application of copper alloy materials with a tin content below 0.2%
At the same time, since the material only contains a trace amount of tin, the material has insufficient softening resistance. Relying on the existing process to improve the plasticity of the material will significantly reduce the material strength, which cannot meet the support strength requirements of the connector.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The process steps are: batching→melting→casting→sawing→heating→hot rolling→milling→intermediate rolling→edge trimming→pickling→finished product rolling→two-stage low temperature annealing→cleaning→performance testing→finished product shearing→ Packaging and storage.

Embodiment 2

[0045] The first step, ingredients: use standard cathode copper, return the old materials in the process of processing, and weigh the small metals respectively, and reserve them;

[0046] The content of the copper alloy components is:

[0047] 0.1wt.%-0.2wt.% Sn, 0.01wt.%-0.03wt.% other metal elements, the other metal elements are Cr, Ni, Si, P, Mg, Zn, Fe, Mn, Al One or more combinations of , the remainder is copper and inevitable impurities, and the sum of the weights of the above components is 100%;

[0048] The second step, smelting: put the ingredients into a 10t intermediate frequency induction furnace for non-vacuum smelting, and use graphite powder and dehydrated charcoal to mix for covering, the covering thickness is not less than 150mm, the smelting furnace is smelted by electric heating, and melted to 1050 ~ 1250 ℃ the melt;

[0049] Sampling and analysis of the melt;

[0050] In order to ensure the quality of the melt, the raw materials and covering agents used ...

Embodiment 3

[0058] The fourth step, sawing: sawing the ingot on the sawing machine according to the required length;

[0059] The fifth step, heating: the ingot is heated by a walking heating furnace, the heating temperature is 780-980 ° C, the heating time is 2-8 hours, the heat preservation is 3-7 hours, and the ingot is heated evenly and then released;

[0060] The sixth step, hot rolling: after the ingot is released from the furnace, use a high-pressure spray gun to remove the surface oxide scale before hot rolling, and perform hot rolling on the hot rolling equipment. One, after the final pass of hot rolling, water spray cooling is carried out on the hot rolling table;

[0061] The seventh step, milling surface: perform strip milling and edge milling on a double-sided milling machine, the milling cutter speed is 700-900r / min, the milling speed is 8-20m / min, and the surface has no peeling, no oxidation pits, no adhesion chips;

[0062] The eighth step, intermediate rolling: intermed...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
yield strengthaaaaaaaaaa
elongationaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation technology for improving bending forming of a copper-tin alloy strip. The technological process comprises the steps of burdening, smelting, casting, saw cutting, heating, hot rolling, face milling, intermediate rolling, edge shearing, acid pickling, finished product rolling, two-stage low-temperature annealing, cleaning, performance detection, finished product shearing and packaging and warehousing. According to the invention, the production process and method of the copper alloy material containing less than 0.2 wt.% of trace tin meet the requirements of high strength and good formability of the material at the same time.

Description

technical field [0001] The invention relates to the field of non-ferrous metal processing, in particular to a preparation process for improving the bending and forming of copper-tin alloy strips. Background technique [0002] In recent years, with the wide application of tin-phosphor bronze materials, there has been a boom in the research and development of tin-containing copper alloy materials. Among them, tin-containing copper alloys with a tin content of less than 0.2wt. The advantages of low cost and other advantages have quickly seized the connector market in some medium and high temperature working environments, becoming one of the hottest materials in the near future. Since the tin content is less than 0.2wt.%, the effect of improving the performance of the material by heat treatment is not obvious. It is necessary to improve the strength of the material by work hardening (hardness Hv≥128, tensile strength Rm≥430Mpa), but it will lead to bending formability of the mat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B23P23/04B22D11/111C21D9/52C22C1/02C22C9/02C22F1/02C22F1/08C23G1/10C23G3/02
CPCB23P23/04C22C1/02C22C9/02B22D11/004B22D11/111C23G1/103C23G3/02C21D9/52C22F1/08C22F1/02Y02P10/20
Inventor 郭慧稳万建牛立业许春伟
Owner 中铝洛阳铜加工有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com