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High strength heat resistant alloy

A technology of heat-resistant alloys and aluminum alloys, which is applied in the field of cast aluminum-silicon alloys, high-strength and hot aluminum alloys, can solve problems such as undiscovered alloy materials reported in literature, and achieve performance stability problems, small structures, and low cost. Effect

Inactive Publication Date: 2006-01-11
XIAN POLYTECHNIC COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0010] After searching in existing information systems and networks, it has not been found that there are completely identical bibliographical reports with the alloy material and performance of the present invention

Method used

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Embodiment 1

[0044] see figure 1 , the alloy of the present invention is welded by alloy smelting method, and its chemical composition (wt%) is as follows: Si: 14.5, Cu: 2.7, Ni: 1.5, Mn: 0.7, Mg: 0.6, Ti: 0.1, Fe: 0.3, B: 0.08 , Zr: 0.04, Cd: 0.2, P: 0.03, and the rest are aluminum. Put industrial pure aluminum, pure magnesium, crystalline Si, electrolytic nickel Ni, electrolytic copper Cu, titanium Ti, manganese Mn or Al-Si, Al-Cu, Al-Ti, Al-Mn, Al-Ni master alloy in the crucible furnace Melting, pouring parts after refining, metamorphism, and static. The room temperature tensile strength of the obtained material is 320-380MPa, and the high-temperature (350°C) tensile strength is 120-160MPa, which is 3-4 times of the high-temperature strength of common aluminum-silicon alloys. The hardness is 50% higher than that of the aluminum-silicon matrix alloy, and the elastic modulus is 40% higher than that of the aluminum-silicon matrix alloy. figure 1 is the heat treatment metallographic stru...

Embodiment 2

[0047] The preparation method is the same as in Example 1, and the alloy of the present invention is prepared by using the alloy smelting technology. Its chemical composition (wt%) is as follows: Si: 7.0, Cu: 2..0, Ni: 1.5, Mn: 0.7, Mg: 0.6, Ti: 0.15, Fe: 0.3, B: 0.08, Zr: 0.04, Cd: 0.2, P: 0.005, the rest is aluminum, the room temperature tensile strength of the obtained material is 320-400MPa, the high temperature (350°C) tensile strength is 120-140MPa, and the hardness is 32% higher than that of the aluminum-silicon matrix alloy. image 3 It is the as-cast metallographic structure photo of the alloy

Embodiment 3

[0049] The preparation method is the same as in Example 1, and the alloy of the present invention is prepared by using the alloy smelting technology. Its chemical composition (wt%) is as follows: Si 7, Cu 2, Ni 0.5, Mn 0.2, Mg 0.6, Ti 0.08, Fe 0.3, B 0.02, Zr0.04, Cd 0.15, P 0.01, the rest is aluminum, because the alloy including evenly distributed L1 2 Crystal structure of Al 3 X particles (X is Ti, Zr, Ni) and TiB with hcc crystal structure 2 , their lattice parameters are coherent with the aluminum matrix, have good high temperature stability, and play the role of grain refinement and high temperature strengthening in the alloy. The room temperature tensile strength of the obtained material is 340-410MPa, the high-temperature (350°C) tensile strength is 80-120MPa, and the hardness is 30% higher than that of the aluminum-silicon matrix (aluminum-silicon binary alloy with the same silicon content) alloy. Figure 4 is the alloy coherent nanophase Al 3 TEM topography of Ti;...

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Abstract

A high-strength refractory Al alloy with high strength, size stability and resistance to high temp (350-400 deg.C) and wearing contains proportionally Si, Cu, Ni, Mn, Mg, Ti, B, Zr, Cd, P and Al. It features that it contains the uniformly distributed Al3X particles with LI2 crystal structure and TiB2 particles with hcc crystal structure.

Description

technical field [0001] The invention relates to metal materials, in particular to cast aluminum-silicon alloys used at high temperatures, specifically high-strength and thermal aluminum alloys. Background technique [0002] Aluminum alloy is a light metal structure material with high specific strength and specific modulus, excellent machining performance, good corrosion resistance, excellent vibration damping performance and cutting performance, and can withstand certain shock and vibration loads , the use of aluminum alloys can reduce the weight of the product, reduce processing energy, and reduce energy consumption, so aluminum alloys are widely used in aircraft, automobiles, motorcycles and other industries. [0003] Aluminum-silicon alloy is the most widely used aluminum alloy, accounting for 85% to 90% of aluminum alloy castings in the automotive industry. According to the silicon content, it can be divided into: hypoeutectic aluminum-silicon alloy (<12wt%Si), eutec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/02
Inventor 李建平杨忠杨觉民郭永春李高宏夏峰杨通
Owner XIAN POLYTECHNIC COLLEGE
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