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Preparation method of high-strength superfine dual-phase laminated QAl10-4-4 aluminum bronze alloy plates

An alloy sheet and aluminum bronze technology, which is applied in the field of preparation of high-strength and toughness ultra-fine double-phase layered structure QAl10-4-4 aluminum bronze alloy, can solve the problems of limited material size, lack of wide application, complicated melting process, etc. The effect of excellent comprehensive mechanical properties, ultra-refinement of microstructure, and excellent comprehensive mechanical properties

Active Publication Date: 2019-01-04
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the invention patent CN104388749A, a manganese-aluminum bronze alloy and its preparation method are disclosed, and the smelting process is complicated due to the large amount of added elements
At present, there have been reports on the preparation of ultrafine and nanocrystalline pure copper or copper alloys by SPD technology, but due to the limitations of the size and preparation equipment of the prepared materials, they have not been widely used.
At present, there are few reports on the preparation of large-scale lamellar bulk copper alloys with high strength and high plasticity and toughness by strong deformation asynchronous rolling or asynchronous synchronous mixed rolling.

Method used

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  • Preparation method of high-strength superfine dual-phase laminated QAl10-4-4 aluminum bronze alloy plates
  • Preparation method of high-strength superfine dual-phase laminated QAl10-4-4 aluminum bronze alloy plates
  • Preparation method of high-strength superfine dual-phase laminated QAl10-4-4 aluminum bronze alloy plates

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Embodiment 1

[0029] The steps of preparing the high-strength and toughness ultrafine dual-phase lamellar structure QAl10-4-4 aluminum-bronze alloy sheet with the ordinary QAl10-4-4 aluminum-bronze alloy sheet in the hot-rolled state as the initial material are as follows:

[0030] Step 1, dual-phase microstructure control preheating treatment: place the QAl10-4-4 aluminum bronze alloy sheet with an initial thickness of 10 mm in the hot-rolled state in a heat treatment furnace at 900 ° C for 5 hours to obtain a uniform dual-phase microstructure The first semi-finished plate, the obtained structure is equiaxed α phase, β phase and granular k2 phase, and its typical metallographic structure is shown in the appendix figure 1 ;

[0031]Step 2, strong deformation asymmetric medium temperature continuous rolling: the first semi-finished plate obtained after the heat treatment of step 1 is immediately subjected to large deformation asymmetric rolling treatment, and the shearing effect generated in...

Embodiment 2

[0035] The steps of preparing the high-strength and toughness ultrafine dual-phase lamellar structure QAl10-4-4 aluminum-bronze alloy sheet with the ordinary QAl10-4-4 aluminum-bronze alloy sheet in the annealed state as the initial material are as follows:

[0036] Step 1, dual-phase microstructure control preheating treatment: place the QAl10-4-4 aluminum bronze alloy sheet with an initial thickness of 10 mm in the hot-rolled state in a heat treatment furnace at 850 ° C for 2 hours to obtain a uniform dual-phase microstructure The first semi-finished panel;

[0037] Step 2, strong deformation asymmetric medium-temperature continuous rolling: the first semi-finished plate obtained after step 1 heat treatment is immediately subjected to large deformation asymmetric rolling treatment, the initial temperature of the roll is room temperature, and the linear speed ratio of the rolls on the upper and lower surfaces of the plate is 1.2 : 1, the asymmetric rolling is divided into two...

Embodiment 3

[0041] The common QAl10-4-4 aluminum-bronze alloy plate under the solid solution aging state is the preparation method of the high-strength and toughness dual-phase lamellar structure QAl10-4-4 aluminum-bronze alloy plate as initial material, and its steps are basically the same as embodiment 2, different The difference is that step 1 is omitted. The tensile strength of the obtained plate exceeds 1100MPa, the yield strength exceeds 900MPa, and the elongation at break is close to 8.5%.

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Abstract

The invention relates to a preparation method of high-strength superfine dual-phase laminated QAl10-4-4 aluminum bronze alloy plates. According to the preparation method, firstly, a dual-phase organization is regulated and heated, a raw material of QAl10-4-4 aluminum bronze alloy is treated in a thermal treatment furnace for 2-5 hours at a temperature of 850-920 DEG C, then the heated material issubjected to severe deformation through asymmetric continuous rolling and symmetric continuous rolling sequentially, and finally the rolled material is subjected to thermal treatment after deformation. An alpha phase of a face-centered cubic Cu-based solid solution and a beta phase of a body-centered cubic structure in an obtained structure obtained from thermal treatment are distributed in laminations, and a large amount of k phases of intermetallic compounds are dispersed inside the laminations and at boundaries of the laminations. The high-strength superfine dual-phase laminated QAl10-4-4 aluminum bronze alloy plates have the advantages that yield strength is not smaller than 900MPa, tensile strength is not smaller than 1000MPa, hardness is not smaller than 390HV, and elongation at break is not smaller than 8%. Compared with the prior art, the preparation method not only can improve performance of the QAl10-4-4 aluminum bronze alloy, but also is simple in process, easy to operate and low in cost, and can be used to realize preparation of the large-size QAl10-4-4 aluminum bronze alloy plates.

Description

technical field [0001] The invention belongs to the technical field of copper alloy material processing, and in particular relates to a preparation method of a QAl10-4-4 aluminum bronze alloy with a high-strength, toughness and ultrafine dual-phase lamellar structure. Background technique [0002] QAl10-4-4 aluminum bronze alloy has good casting properties, mechanical properties and corrosion resistance, and is an important structural material widely used in industrial fields. The alloy is relatively cheap and has been put into large-scale industrial production since the 1950s. Nowadays, it has been widely used in wear-resistant parts working under high stress in civilian industries such as household appliances and machinery, and in military industries such as artillery shells, ships, aircrafts, and ships. In addition, QAl10-4-4 aluminum bronze alloy also has broad application prospects in welding, explosion-proof devices, shape memory alloys and seawater desalination. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/08
CPCC22F1/002C22F1/08
Inventor 马硕付立铭单爱党
Owner SHANGHAI JIAO TONG UNIV
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