Amorphous high-entropy solder alloy for brazing tantalum Ta1 and 1Cr18Ni9 stainless steel and preparation method thereof

A 1cr18ni9, high-entropy alloy technology, applied in the field of amorphous high-entropy alloy solder and its preparation, can solve problems such as cracking and difficulty in obtaining, and achieve excellent strength, easy control, and good adaptability

Inactive Publication Date: 2018-11-30
XIAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of amorphous state high-entropy alloy solder and its preparation method for brazing tantalum Ta1 and 1Cr18Ni9 stainless steel, solve existing welding method and easily form hard and brittle intermetallic compound to cause cracking, be difficult to obtain high Problems with Performance Artifacts

Method used

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  • Amorphous high-entropy solder alloy for brazing tantalum Ta1 and 1Cr18Ni9 stainless steel and preparation method thereof

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preparation example Construction

[0025] The amorphous alloy solder foil obtained by the above-mentioned preparation method, when assembling the sample joint of brazing tantalum / steel, first place the foil between the tantalum to be welded and the steel to be welded interface, and then vacuum The brazing method heats, heats, cools and solidifies the assembled joints to realize the brazing of tantalum / steel.

[0026] Table 1 is the solder composition distribution table of four embodiments of the present invention

[0027]

Embodiment 1

[0029] The quality of the high-purity metals of each component was determined according to the molar percentages in Example 1 in Table 1, and the above-mentioned brazing filler metal preparation steps were implemented, and the prepared amorphous alloy brazing filler metal foil was about 60 μm thick. Using the amorphous alloy brazing filler metal foil, Ta1 and 0Cr18Ni9Ti were brazed in a furnace at a brazing temperature of 1090°C and held for 5 minutes to obtain a joint with a shear strength of 210.0MPa.

Embodiment 2

[0031] According to the molar percentages in Example 2 in Table 1, the quality of the high-purity metals of each component was determined, and the above-mentioned solder preparation steps were implemented to prepare a state-of-the-art amorphous alloy solder foil with a thickness of about 55 μm. Using the amorphous alloy brazing filler metal foil, Ta2 and 0Cr18Ni9Ti were brazed in a furnace at a brazing temperature of 1070°C and held for 5 minutes to obtain a joint with a shear strength of 221.0MPa.

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Abstract

The invention discloses amorphous high-entropy solder alloy for brazing tantalum Ta1 and 1Cr18Ni9 stainless steel and a preparation method thereof. The amorphous high-entropy solder alloy is preparedfrom the following components in mole percentage: 7.0-9.0% of Cr, 5.0-8.0% of Si, 5.0-7.0% of Fe, 6.0-8.0% of Zr, 2.0-3.0% of Ta, 2.5-4.5% of B and the rest Ni. The preparation method comprises the steps: respectively melting and preparing Ni40Cr10Ta and Zr20Cr20Ta intermediate alloy by a vacuum arc furnace, then putting the two kinds of intermediate alloy and the rest of Ni, Fe, Si, B, etc in a crucible; melting and preparing master solder alloy in the vacuum arc furnace; conducting rapidly quenched solidification for master alloy melt, and thus obtaining amorphous high-entropy solder alloy foil. The melting point of the amorphous high-entropy solder alloy is between 980-1050, the brazing temperature is lower than the grain coarsening temperature of steel, and the performance of a brazingjoint is high. The solder alloy has good flexibility and is conveniently processed and assembled. During welding, the wettability of the solder alloy with tantalum and steel is good, and the corrosion resistance of a brazing seam is good. The mechanical property of the joint is good.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to an amorphous high-entropy alloy solder used for brazing tantalum Ta1 and 1Cr18Ni9 stainless steel and a preparation method thereof. Background technique [0002] Industrial pure tantalum Ta1 has excellent high-temperature performance, extremely high corrosion resistance, and high ductility, and is widely used in chemical, electronic, medical, and atomic energy industries. However, as a rare and precious metal, tantalum is often used in the form of steel structure linings. This tantalum-clad stainless steel composite structure has both the performance advantages of tantalum and stainless steel, but its preparation and use inevitably involve the welding of tantalum and stainless steel. [0003] At present, the welding methods for tantalum / steel at home and abroad include electron beam welding, argon arc welding, and helium arc welding. The melting point of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K103/18
CPCB23K35/0233B23K35/3033
Inventor 翟秋亚徐锦锋刘京召
Owner XIAN UNIV OF TECH
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