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Ferrum-base block non-crystalline alloy material

A technology of amorphous alloys and large blocks, which is applied in the field of amorphous alloys, can solve the problems of increased difficulty of amorphous alloys, relatively high requirements for raw material purity, and increased raw material prices, and achieve good amorphous formation capabilities, low cost, and The effect of cost reduction

Inactive Publication Date: 2007-09-12
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, when preparing iron-based bulk amorphous alloys, the atomic percentage of Fe element is usually less than 50%, which virtually increases the price of raw materials
In addition, the purity requirements for raw materials are relatively high, and the purity of raw materials is usually required to be above 99.9%, so it is difficult to prepare iron-based bulk amorphous alloys.

Method used

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  • Ferrum-base block non-crystalline alloy material
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  • Ferrum-base block non-crystalline alloy material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The industrially used pure metals Fe, Ni, Cr, Mo, Y, C and the industrially used Fe-B alloy are prepared according to the required atomic percentage as raw materials, and are arc melted in an argon protective atmosphere where zirconium absorbs oxygen. The electric arc furnace is equipped with suction casting equipment. After remelting the smelted alloy, suction casting is carried out. After the alloy is injected into the copper mold, Fe with uniform composition is formed. 55 Ni 2 Cr 12 Mo 10 C 13 B 6 Y 2 Large piece of amorphous alloy with a diameter of 4mm. The XRD diffraction pattern proves that the alloy is an amorphous alloy. From the DSC curve, it can be measured that the glass transition temperature (Tg) of the amorphous alloy is 809K, and the initial crystallization temperature (Tg) x1 ) is 841K, melting point (T m ) is 1392K, liquidus temperature (T 1 ) is 1425K, the width of the supercooled liquid phase region (ΔT x ) is 32K, the parameter (γ) is 0.37...

Embodiment 2

[0032] Technical scheme is as embodiment 1, preparation composition is Fe 55 Cu 2 Cr 12 Mo 10 C 13 B 6 Y 2 A bulk amorphous alloy obtained by replacing Ni in the alloy with Cu. Using the technical scheme described in Example 1, an amorphous cylindrical rod with a diameter of 4 mm can be prepared. The glass transition temperature of the alloy is 815K, the initial crystallization temperature is 848K, the melting point is 1385K, and the liquidus temperature (T 1 ) is 1436K, the width of the supercooled liquid phase region (ΔT x ) is 33K, the parameter (γ) is 0.3767, the approximate glass transition temperature is 0.568, and the Vickers hardness is 1253. The passivation potential of the alloy also reached 1.5V in 5% NaCl solution and 1mol / L HCl corrosion solution. The passivation current densities in NaCl solution and HCl solution were 2×10 -3 mA / mm 2 and 5×10 -3 mA / mm 2 . Than Fe 55 Ni 2 Cr 12 Mo 10 C 13 B 6 Y 2 The passivation current density of amorphous al...

Embodiment 3

[0034] Technical scheme is as embodiment 1, uses the Fe-Nb alloy preparation composition of industrial application to be Fe 55 Nb 2 Cr 12 Mo 10 C 13 B 6 Y 2 A bulk amorphous alloy obtained by replacing Ni in the alloy with Nb. Using the technical scheme described in Example 1, an amorphous cylindrical rod with a diameter of 2 mm can be prepared. The glass transition temperature of the alloy is 794K, the initial crystallization temperature is 841K, the melting point is 1390K, and the Vickers hardness is 1325. The temperature of the supercooled liquid phase region of this alloy is 47K, and the liquid phase temperature (T 1 ) is 1422K, and the parameter (γ) is 0.3795, but the approximate glass transition temperature is 0.558. Considering that the amorphous formation ability of this alloy is not as good as that of Fe 55 Ni 2 Cr 12 Mo 10 C 13 B 6 Y 2 and Fe 55 Cu 2 Cr 12 Mo 10 C 13 B 6 Y 2 The alloy has strong amorphous forming ability. The passivation potenti...

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Abstract

This invention relates to a Fe based bulk non-crystal alloy material with the following chemical formula: FeaMbCrcModCeBfYg, and a is greater than 45 and smaller than 60, b is greater than 1 and smaller than 5, c is greater than 5 and smaller than 20, d is greater than 5 and smaller than 15, e is greater than 5 and smaller than 15, f is greater than 0.5 but smaller than 10 and g is greater than 0.5 and smaller han 3, in which, a, b, c, d, e, f and g are atomic percentages, the the weight percentage of the content sum of unavoidable impurities Si, S, P and O is less than 0.5%, and M in the formula is Ni, Cu or Nb.

Description

technical field [0001] The metal material of the invention belongs to the field of amorphous alloys, in particular to an iron-based bulk amorphous alloy material. Background technique [0002] In the prior art, the formation of bulk amorphous alloys, that is, metallic glasses, is usually prepared under extreme conditions. The molten metal alloy is cooled below the glass transition temperature at a relatively fast cooling rate. During the rapid cooling process The formation and growth of crystal nuclei are inhibited, and a long-range disordered amorphous alloy is formed by direct solidification. Amorphous alloys were successfully prepared by Duwez et al. in 1960 by the rapid quenching method of Au 75 Si 25 Strip (document 1, W.Klement, R.H.Wilens and Duwez, Nature, 1960, vol.187, pp869-870.), the cooling rate reaches 10 5 -10 6 K / s, due to the limitation of cooling rate, amorphous alloys can only be prepared into micron-scale thin strips, filaments, and fine powders. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02
Inventor 卢志超郭金花倪晓俊周少雄吴嘉伟薄希辉赵新彬李德仁孙克
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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