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Surface strengthening method for beryllium copper casting-rolling roller sleeve

A technology for surface strengthening and casting rolls, applied in the field of material processing, can solve problems such as poor mechanical properties, achieve the effects of improving mechanical properties, simplifying the processing process, and making up for uneven metallography

Inactive Publication Date: 2018-08-21
YANTAI WANLONG VACUUM METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims at the problem of poor mechanical properties of existing beryllium copper cast roll sleeves, and provides a surface strengthening method for beryllium copper cast roll sleeves

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for strengthening the surface of a beryllium copper cast roll sleeve, comprising the following steps:

[0018] 1) Pretreatment: Select beryllium-copper alloys containing 3wt% beryllium, 0.1wt% nickel, 0.1wt% cobalt and 96.8wt% copper to prepare beryllium-copper cast roll sleeves, and spray common quartz sand on the roll sleeves after turning to increase the Beryllium copper alloy laser absorption rate;

[0019] 2) Laser remelting: set the laser remelting process, the laser power is 3kW, the scanning rate is 100mm / min, the spot diameter is 3mm, and the overlap rate is 15%, and the surface of the beryllium copper cast roll sleeve is scanned to form a surface with a depth of 0.5mm remelted layer;

[0020] 3) Aging treatment: place the beryllium copper cast roll sleeve after laser remelting in a vacuum furnace or an atmosphere protection furnace, heat it to 300-500°C, and keep it warm for 6-10 hours;

[0021] 4) Post-processing: Carry out surface grinding and pol...

Embodiment 2

[0023] A method for strengthening the surface of a beryllium copper cast roll sleeve, comprising the following steps:

[0024] 1) Pretreatment: Select beryllium-copper alloy containing 1.5wt% beryllium, 2wt% nickel, 2wt% cobalt and 94.5wt% copper to prepare beryllium-copper cast roll sleeves, and spray common quartz sand on the roll sleeves after turning to increase beryllium Copper alloy laser absorption rate;

[0025] 2) Laser remelting: set the laser remelting process, the laser power is 4.5kW, the scanning rate is 1000mm / min, the spot diameter is 6.5mm, and the overlap rate is 20%. The surface of the beryllium copper cast roll sleeve is scanned to form a depth of 0.8mm The surface remelted layer;

[0026] 3) Aging treatment: place the beryllium copper cast roll sleeve after laser remelting in a vacuum furnace or an atmosphere protection furnace, heat it to 300-500°C, and keep it warm for 6-10 hours;

[0027] 4) Post-processing: Carry out surface grinding and polishing on...

Embodiment 3

[0029] A method for strengthening the surface of a beryllium copper cast roll sleeve, comprising the following steps:

[0030] 1) Pretreatment: select the beryllium-copper alloy containing 0.1wt% of beryllium, 4wt% of nickel, 4wt% of cobalt and 91.9wt% of copper to prepare beryllium-copper casting roll sleeves, and spray common quartz sand on the roll sleeves after turning to increase the beryllium Copper alloy laser absorption rate;

[0031] 2) Laser remelting: set the laser remelting process, the laser power is 6kW, the scanning rate is 2000mm / min, the spot diameter is 10mm, and the overlap rate is 30%, and the surface of the beryllium copper cast roll sleeve is scanned to form a surface with a depth of 1.2mm remelted layer;

[0032] 3) Aging treatment: place the beryllium copper cast roll sleeve after laser remelting in a vacuum furnace or an atmosphere protection furnace, heat it to 300-500°C, and keep it warm for 6-10 hours;

[0033] 4) Post-processing: Carry out surfac...

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PUM

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Abstract

The invention discloses a surface strengthening method for a beryllium copper casting-rolling roller sleeve. The surface strengthening method comprises the following steps: spraying common quartz sandon the beryllium copper casting-rolling roller sleeve for performing pre-treatment; performing laser re-melting on the surface of the beryllium copper casting-rolling roller sleeve; after the laser re-melting is performed, performing subsequent treatment, such as aging treatment, bathing and grinding and polishing. The surface strengthening method has the beneficial effects that the beryllium copper casting-rolling roller sleeve which is machined by using a conventional process is subjected to surface laser re-melting treatment, melting, solidifying and solid solution treatment are completedquickly, and supersaturated solid solution of beryllium is obtained; then, a dispersed gamma-phase is separated from the supersaturated solid solution by utilizing the aging treatment, so that a high-strength and high-conductivity surface strengthened layer is obtained; other strengthening materials are not molten into a surface laser re-melting treatment step, and the component proportion of a beryllium-copper alloy is not damaged, so that the performance potential of the beryllium-copper alloy can be fully played by the aging treatment; the defect that a metallographic phase is treated non-uniformly by surface laser re-melting is overcome; the mechanical performance of the beryllium copper casting-rolling roller sleeve is greatly improved.

Description

technical field [0001] The invention relates to the field of material processing, in particular to a method for strengthening the surface of a beryllium copper cast roll sleeve. Background technique [0002] Beryllium copper alloy has been regarded as an ideal material for casting roll sleeves because of its high thermal conductivity and excellent high temperature mechanical properties. At present, the beryllium copper alloy used in the manufacture of casting roll sleeves is generally produced by the conventional process of casting billet, hot forging and mechanical processing, it is difficult to obtain uniform and fine grain structure, and the mechanical properties and thermal conductivity of the prepared beryllium copper casting roll sleeve are relatively low Difference. Beryllium-copper alloy is a typical precipitation-strengthened alloy. When it is in solid solution, a supersaturated solid solution of beryllium can be obtained. The supersaturated solid solution precipit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06C22C9/00C22F1/08C22F3/00
Inventor 汤德林王肇飞刘力维史戈宁周舟张倩倩柳青
Owner YANTAI WANLONG VACUUM METALLURGY
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