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Steel-aluminum bronze bimetal material compounding method

An aluminum bronze and bimetal technology is applied in the field of metal composite material preparation to achieve the effect of improving the interface bonding strength and avoiding adverse effects

Inactive Publication Date: 2014-05-21
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the composite method of a steel-aluminum bronze bimetal plate in the present invention is: eliminate the adverse effect of the pure metal layer remaining at the interface of the steel-aluminum bronze bimetal plate on the interface bonding strength

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] Example 1 Composite of 42CrMo steel and QAl7 aluminum bronze

[0032] (1) First, heat the 42CrMo steel plate at about 850°C and keep it warm for about 1 hour, then transfer it to a furnace at about 680°C and keep it warm for 10 hours, and then slowly cool to room temperature with the furnace, and the elongation of the steel plate is about 40%. Heat the QAl7 aluminum bronze to 650°C and keep it warm for 1h, and then cool it slowly to room temperature with the furnace. At this time, the elongation of the copper plate is about 45%.

[0033] (2) The 42CrMo steel after surface cleaning and activation is hot-dip aluminized in 710 ℃ aluminum liquid. The immersion plating time and extraction speed are controlled so that the thickness of the pure aluminum layer is about 20 μm.

[0034] (3) After surface cleaning and roughening again, the aluminum-plated 42CrMo steel and QAl7 aluminum bronze are laminated, and the steel and aluminum bronze are cold-rolled and composited with 50%...

Embodiment 2

[0039] Example 2 Composite of 42CrMo steel and QAl7 aluminum bronze

[0040] (1) First, heat the 42CrMo steel plate at about 850°C and keep it warm for about 1h, then transfer it to a furnace at about 680°C and keep it warm for 10h, and then slowly cool to room temperature with the furnace, at which time the elongation of the steel plate is about 40%. Heat the QAl7 aluminum bronze to 650°C and keep it warm for 1h, and then cool it slowly to room temperature with the furnace. At this time, the elongation of the copper plate is about 45%.

[0041] (2) The 42CrMo steel after surface cleaning and activation is hot-dipped in aluminum liquid at 680°C. The immersion plating time and extraction speed are controlled so that the thickness of the pure aluminum layer is about 60 μm.

[0042] (3) After surface cleaning and roughening again, the aluminum-plated 42CrMo steel and QAl7 aluminum bronze are laminated, and the steel and aluminum bronze are cold-rolled and composited with 80% sin...

Embodiment 3

[0047] Example 3 Composite of 42CrMo steel and QAl7 aluminum bronze

[0048] (1) First, heat the 42CrMo steel plate at about 850°C and keep it warm for about 1h, then transfer it to a furnace at about 680°C and keep it warm for 10h, and then slowly cool to room temperature with the furnace, at which time the elongation of the steel plate is about 40%. Heat the QAl7 aluminum bronze to 650°C and keep it warm for 1h, and then cool it slowly to room temperature with the furnace. At this time, the elongation of the copper plate is about 45%.

[0049] (2) The 42CrMo steel after surface cleaning and activation is hot dipped in aluminum liquid at 690 ℃. The immersion plating time and extraction speed are controlled so that the thickness of the pure aluminum layer is about 40 μm.

[0050](3) After surface cleaning and roughening again, the aluminum-plated 42CrMo steel and QAl7 aluminum bronze are laminated, and the steel and aluminum bronze are cold-rolled and composited with 60% sing...

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Abstract

The invention provides a compounding method of a steel-aluminum bronze bimetal plate. The method comprises the following steps of: annealing for lowering the strength of steel and aluminum bronze respectively to increase the plastic deformation capability; thermally dipping a layer of pure aluminum on a steel surface at a temperature which does not surpass a eutectoid transformation temperature; compounding aluminum-plated steel with aluminum bronze by performing cold rolling at one time at a large deformation amount; performing liquid phase diffusion annealing in a temperature range which is higher than the melting point of aluminum and lower than steel eutectoid transformation temperature; performing warm rolling immediately after diffusion annealing; finely rolling to a required size of a finished product, and flattening a plate surface; and performing stress relief annealing at last. Due to the adoption of the compounding method, the adverse effect of residual of a pure aluminum layer on an interface can be avoided, and the interface bonding performance of a steel-aluminum bronze bimetal material is improved greatly.

Description

technical field [0001] The invention relates to a method for preparing metal composite materials, in particular to a method for rolling and compounding steel-aluminum bronze bimetal plates. Background technique [0002] Aluminum bronze has excellent properties such as high strength, corrosion resistance, wear resistance and friction reduction, and is widely used in the machine parts manufacturing industry. Aluminum bronze is a copper alloy with aluminum as the main alloying element. When the aluminum content is less than or equal to 9.4%, the alloy is a single-phase α copper-based solid solution, and its mechanical properties are mainly improved by deformation strengthening methods such as extrusion and rolling. Typical alloys include QAl5, QAl7, QAl9 and other grades; and when the aluminum content is 9.4-16.0%, due to the β→α+γ eutectoid transformation in the phase diagram and the martensitic transformation during rapid cooling, the alloy has the characteristics of heat tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/01B21B1/38C21D1/26C23C2/06C21D8/02
Inventor 李海王芝秀徐丹陆海徐一铭
Owner CHANGZHOU UNIV
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