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Iron-based bulk metallic glass alloy with large supercooled liquid phase region
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A technology of supercooled liquid phase region and bulk metal, applied in the field of new materials, can solve problems such as the use of difficult-to-metal glass alloys and low stability of supercooled liquids, and achieve the effects of low cost, low production cost and high practical value
Active Publication Date: 2015-02-18
DALIAN UNIV OF TECH
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[0008] It can be seen that although the T of the above two iron-based metallic glass alloys g low, but the stability of its supercooled liquid is very low, ΔT x are all lower than 40 ℃, it is difficult to use as a metallic glass alloy for superplastic processing
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Embodiment 1
[0036] Fe 55 co 10 Ni 5 Mo 5 P 10 C 10 B 5 Preparation, testing and superplastic processing of metallic glass alloys.
[0037] (1) High-purity elements are used for compounding according to the chemical composition ratio of the alloy. Phosphorus is added through the iron-phosphorus alloy. The purity of the elements in terms of mass percentage is: iron: 99.9%, cobalt: 99.9%, nickel: 99.9%, molybdenum : 99.9%, carbon: 99.999%, boron: 99.5%, iron phosphorus: 99.9%.
[0038] (2) Put the proportioned raw materials into the crucible of the induction melting furnace, and evacuate to 2×10 -3 Pa, filled with argon, in the argon atmosphere, using high-frequency induction melting 4 times, to obtain a master alloy ingot with uniform composition.
[0039] (3) Break the master alloy ingot and put it into a quartz tube with a small hole at the bottom. After vacuuming, fill it with argon gas. In the argon atmosphere, first heat the master alloy to a molten state by high-frequency ind...
Embodiment 2
[0048] Fe 55 Ni 15 Mo 5 P 10 C 10 B 5 Preparation, testing and superplastic processing of metallic glass alloys. Step is with embodiment 1, and concrete data is listed in attached table.
Embodiment 3
[0050] Fe 65 Ni 5 Mo 5 P 10 C 10 B 5 Preparation, testing and superplastic processing of metallic glass alloys. Step is with embodiment 1, and concrete data is listed in attached table.
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Abstract
The invention relates to an iron-based bulk metallic glass alloy with a large supercooled liquid phase region and belongs to the technical field of novel materials. The iron-based bulk metallic glass alloy with the large supercooled liquid phase region is characterized by consisting of iron, nickel, cobalt, molybdenum, chromium, tungsten, phosphorus, carbon, boron and silicon and having a composition expression of FexNiyCozMoaCrbWcPdCeBfSig, wherein x, y, z, a, b, c, d, e, f and g respectively represent atom percent content of each corresponding component; x is 50 to 70 percent; y is 0 to 20 percent; z is 0 to 15 percent; a is 2 to 6 percent; b is 0 to 4 percent; c is 0 to 3 percent; d is 8 to 15 percent; e is 10 to 12 percent; f is 2 to 6 percent; g is 0 to 2 percent; x+y+z is 50 to 75 percent; a+b+c is 4 to 10 percent; and x+y+z+a+b+c+d+e+f+g is equal to 100 percent. The alloy has the typical composition expression of Fe55Co10Ni5Mo5P10C10B5. The iron-based bulk metallic glass alloy has the effects and the benefits that the alloy simultaneously has the advantages of low glass transition temperature, large supercooled liquid phase interval, high glass-forming ability, low coercive force, excellent mechanical performance, low viscosity coefficient in a cold liquid phase interval and the like, can implement micron-grade and nano-grade superplasticity processing, and is a novel iron-based soft magnetic metallic glass alloy for superplasticity processing, with low production cost.
Description
technical field [0001] The invention belongs to the technical field of new materials, and relates to an iron-based metallic glass alloy which can be used for superplastic processing and has a large supercooled liquid phase interval, a low glass transition temperature, strong glass forming ability, excellent mechanical properties and good soft magnetic properties and its preparation method. Background technique [0002] Due to their special atomic arrangement structure, metallic glasses (amorphous alloys) have functional properties unmatched by ordinary crystalline metal materials, such as high strength, high specific strength, large elastic limit, excellent soft magnetic properties, high resistance Corrosion performance, supercooled liquid viscous flow characteristics, and precision casting formability, etc., are gradually being applied in fields such as energy, environment, electronics, and biomedicine. However, due to the influence of the glass forming ability of the allo...
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