Preparation method of ultra-large aluminum alloy ring forge piece

A super-large ring, aluminum alloy technology, applied in metal processing equipment and other directions, can solve the problems of small anisotropy of mechanical properties of ring forgings, anisotropy of ring parts, etc., to reduce smelting defects, optimize structure, and improve alloy toughness. Effect

Active Publication Date: 2022-05-31
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to propose a method for preparing an aluminum alloy super-large ring forging, to overcome the deficiencies of the prior art, the mechanical properties of the prepared ring forging are anisotropic Small, solves the problem of ring anisotropy

Method used

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  • Preparation method of ultra-large aluminum alloy ring forge piece

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Embodiment 1

[0042] This embodiment provides a preparation method of an aluminum alloy super-large ring forging, and the preparation method includes the following steps:

[0043] (1) Control the above-mentioned aluminum alloy (in terms of weight per hundred parts of aluminum alloy, composition: 0.1 part of Cu, 1.8 part of Mg, 5.0 part of Zn, 0.1 part of Ti, 0.2 part of Cr, 0.0003 part of Be) to smelt at a certain temperature , specifically, the melting temperature is 740 °C;

[0044] (2) After the charge is all melted, add a refining agent at 740°C, carry out refining treatment on the melt, and remove the slag after holding for 20 minutes;

[0045] (3) refining and degassing the refined melt in a vacuum state, the temperature is controlled at 740° C. for 20 minutes, followed by semi-continuous casting, and an aluminum alloy round ingot is obtained after cooling;

[0046] (4) the ingot-forming aluminum alloy processed by the above steps is subjected to heat preservation and homogenization ...

Embodiment 2

[0055] This embodiment provides a preparation method of an aluminum alloy super-large ring forging, and the preparation method includes the following steps:

[0056] (1) Control the above-mentioned aluminum alloy (in terms of weight per hundred parts of aluminum alloy, composition: 0.1 part of Cu, 1.8 part of Mg, 5.0 part of Zn, 0.1 part of Ti, 0.2 part of Cr, 0.0003 part of Be) to smelt at a certain temperature , specifically, the melting temperature is 740 °C;

[0057] (2) After the charge is all melted, add a refining agent at 740°C, carry out refining treatment on the melt, and remove the slag after holding for 20 minutes;

[0058] (3) refining and degassing the refined melt in a vacuum state, the temperature is controlled at 740° C. for 20 minutes, followed by semi-continuous casting, and an aluminum alloy round ingot is obtained after cooling;

[0059] (4) the ingot-forming aluminum alloy processed by the above steps is subjected to heat preservation and homogenization ...

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Abstract

The invention relates to a preparation method of an ultra-large aluminum alloy ring forge piece. The method comprises the following steps: controlling the aluminum alloy to be molten at a certain temperature, refining, degassing in vacuum, filtering, semi-continuous casting, milling, homogenizing before forging, pre-deforming before forging, recrystallizing before forging, forging, quickly die-cutting, ring rolling forming, heat treatment and the like. The aluminum alloy is subjected to component optimization, and forging forming comprises the steps that a cast ingot is directly upset to be in a cake shape; rapidly punching holes in the round cake by adopting a die; remelting for the second time for heat preservation homogenization treatment for eliminating internal stress; and forging into an annular forge piece on a numerical control ring rolling machine. The aluminum alloy is subjected to treatment such as recrystallization after pre-deformation before component optimization and forging, so that impurity phases such as Fe and Si are converted from grain boundary aggregation to intragranular distribution through recrystallization, and meanwhile, the forging structure is refined. The ultra-large aluminum alloy ring forging prepared by the method has the advantages of uniform and symmetrical stress distribution, small anisotropy of three-direction mechanical properties of the ring forging and the like.

Description

technical field [0001] The invention relates to the technical field of plastic processing of metal materials, in particular, to a preparation method of an aluminum alloy super-large ring forging. Background technique [0002] The manufacture of super-large forgings is one of the key technologies in the manufacture of major equipment, and its quality directly affects the overall level and operational reliability of major equipment. The premise of equipment manufacturing. [0003] The characteristics of super-large forgings are large tonnage and large size, including forgings such as rings, shafts, and cakes. Cold deformation and aging, in which the billet can be cast ingot, or can be prepared into rolled sheet, extruded material or free forging by rolling, extrusion and free forging. The microstructure and properties of the billet play a decisive role in the final properties of the forging. [0004] The published patent documents use ingots or extruded materials as blanks,...

Claims

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Application Information

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IPC IPC(8): B21J5/00B21J5/08C22C1/02C22C1/06C22F1/053
CPCB21J5/002B21J5/08C22C1/026C22C1/06C22F1/053
Inventor 王磊陈哲
Owner SHANGHAI JIAO TONG UNIV
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