Alterant for ADC12 aluminum alloy and alteration method of alloy

A technology of ADC12 and aluminum alloy, which is applied in the field of modifiers for aluminum alloys, can solve the problems of poor mechanical properties, easy decay, unstable refinement effect of modifiers, etc., and achieve excellent performance, not easy to decay, and stable refinement effect

Inactive Publication Date: 2014-03-19
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the refinement effect of the modifier of the existing ADC12 aluminum alloy is unstable and easy to decline, and the as-cast structure of the ADC12 aluminum alloy is coarse α-Al dendrite and needle-like eutectic silicon, and the mechanical properties are poor. problem, and provide a modification agent for ADC12 aluminum alloy and its modification method

Method used

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  • Alterant for ADC12 aluminum alloy and alteration method of alloy
  • Alterant for ADC12 aluminum alloy and alteration method of alloy
  • Alterant for ADC12 aluminum alloy and alteration method of alloy

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specific Embodiment approach 1

[0019] Specific embodiment 1: This embodiment is a modification agent for ADC12 aluminum alloy consisting of Al-5Ti-B master alloy and Al-10RE master alloy; the mass percentage of Ti in the Al-5Ti-B master alloy is 0.01 % to 0.06%; the mass percentage of B in the Al-5Ti-B master alloy is 0.002% to 0.012%; the mass percentage of RE in the Al-10RE master alloy is 0.2% to 1.0%.

[0020] The advantages of this embodiment: 1. The refinement effect of this embodiment is stable and not easy to decline; 2. This embodiment refines the α-Al dendrites and eutectic silicon in the ADC12 alloy structure, which improves the strength of the ADC12 aluminum alloy. Performance; 3. This embodiment solves the problems of severe splitting and poor mechanical properties of ADC12 aluminum alloy. The tensile strength is 230MPa-237MPa, the tensile strength is increased by 25%-30%, and the elongation is 3.0%-3.6%. Increased by 2 times to 2.6 times, expanding the scope of use of the ADC12 aluminum alloy;...

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the mass percentage of Ti in the Al-5Ti-B master alloy is 0.02% to 0.04%; The mass percentage of B is 0.002% to 0.008%. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: The difference between this embodiment and Embodiment 1 or Embodiment 2 is that the mass percentage of RE in the Al-10RE master alloy is 0.4%-0.8%. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to an alterant for an aluminum alloy and an alteration method of the alloy, and particularly relates to an alterant for an ADC12 aluminum alloy and an alteration method of the alloy. The invention aims to solve the problems that an existing alterant for the ADC12 aluminum alloy is unstable in refining effect and easy to decline, and an ADC12 aluminum alloy as-cast structure is massive alpha-Al treelike crystal and flaky cocrystallized silicon and is poor in mechanical property. The alterant of the ADC12 aluminum alloy, which is disclosed by the invention, consists of an Al-5Ti-B intermediate alloy and an Al-10RE intermediate alloy. The alteration method comprises the following steps: 1, smelting; 2, refining; 3, adding the Al-5Ti-B intermediate alloy; 4, adding the Al-10RE intermediate alloy; and 5, pouring. The alterant disclosed by the invention has the advantages that 1, the refining effect is stable, 2, the problems of serious separation and poor mechanical property of the ADC12 aluminum alloy are solved, and the tensile strength is improved by 25-30%, and 3, the alterant is easy to obtain and the cost can be saved. According to the alternant and the alteration method, the ADC12 aluminum alloy with excellent property can be obtained.

Description

technical field [0001] The invention relates to a modifier of aluminum alloy and a modification method thereof. Background technique [0002] Al-Si alloy is an important casting alloy. It has the advantages of low density, high specific strength, small thermal expansion coefficient, good thermal stability, wear resistance and corrosion resistance. ADC12 alloy is a eutectic Al-Si alloy. , has good casting properties (good fluidity, low shrinkage), high specific strength, small thermal expansion coefficient and corrosion resistance. Therefore, it is widely used in automobile, motorcycle and other manufacturing industries, such as: engine case, transmission case, cylinder head, locomotive shock absorber, engine gearbox and other parts. However, the as-cast structure of ADC12 aluminum alloy without modification and refinement treatment is coarse α-Al dendrites and eutectic silicon needles, which severely split the aluminum matrix and deteriorate the mechanical properties of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/04C22C1/03
Inventor 陈玉勇朱明冬肖树龙冯玉凤阮志林贾爱民
Owner HARBIN INST OF TECH
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