A wear-resistant and corrosion-resistant high-chromium iron-based amorphous alloy and its preparation method
A technology of amorphous alloy and high-chromium iron, which is applied in the field of iron-based amorphous alloy, can solve the problems of unfavorable industrial application, lower thermal stability, unfavorable application at high temperature, etc., and achieve excellent friction and wear resistance and high thermal stability , Excellent corrosion resistance
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Embodiment 1
[0034] The main component of the iron-based amorphous alloy of the present embodiment is (Fe 0.9 Ni 0.1 ) 36 Cr 23 Mo 18 B 6 Y 2 , wherein the content of three atomic percentages (at%) of Fe, Cr and Mo are respectively 32.5±0.4, 23.0±0.7, 18.0±0.2.
[0035] The specific preparation method is as follows:
[0036] First press (Fe 0.9 Ni 0.1 ) 36 Cr 23 Mo 18 (C 0.9 P 0.1 ) 15 B 6 Y 2 The mass ratio of the amorphous alloy is used for batching;
[0037] Then, under the condition of evacuating the prepared raw materials and filling them with high-purity argon gas, the titanium ingots are arc smelted to purify the gas in the furnace, and the raw materials are smelted repeatedly for more than 5 times by adding magnetic stirring to obtain a uniform composition. alloy ingot;
[0038] Finally, put the alloy ingot above the copper mold for suction casting, heat the alloy ingot with an electric arc until it is completely melted and keep it warm for 10-20s, open the valve ...
Embodiment 2
[0042] The main component of the iron-based amorphous alloy of this embodiment is Fe 32 Cr 25 Mo 20 (C 0.9 P 0.1 ) 15 B 6 Y 2 , where the content of three atomic percentages (at%) of Fe, Cr and Mo are respectively 32.0±0.4, 25.0±0.5, and 20.0±0.2.
[0043] 4mm alloy rods were prepared using the test method described in Example 1.
[0044] The XRD of the 4mm diameter sample that present embodiment provides (as figure 1 (B)) shows that it has a fully amorphous structure; DSC analysis shows that the system has high thermal stability, the glass transition temperature Tg reaches 905K, the crystallization initiation temperature Tx reaches 955K, the original system Tg is 838K, and Tx is 896K; the system Excellent corrosion resistance, the corrosion rate in aqua regia is only 0.67mm / a, the corrosion rate in 3.5wt.% NaCl solution is only 0.0004mm / a, and the passivation current density is 2~5*10 -6 A / cm 2 (like figure 2 (B)), the corrosion rate of the original system in aqua...
Embodiment 3
[0046] The main component of the iron-based amorphous alloy of this embodiment is Fe 28 Cr 27 Mo 22 (C 0.9 P 0.1 ) 15 B 6 Y 2 , wherein the content of three atomic percentages (at%) of Fe, Cr and Mo are respectively 28.0±0.4, 27.0±0.5, 22.0±0.2.
[0047] 4mm alloy rods were prepared using the test method described in Example 1.
[0048] The XRD of the 4mm diameter sample that present embodiment provides (as figure 1 (C)) shows that it has a fully amorphous structure; DSC analysis shows that the system has high thermal stability, the glass transition temperature Tg reaches 910K, the crystallization initiation temperature Tx reaches 959K, the original system Tg is 838K, and Tx is 896K; the system Excellent corrosion resistance, the corrosion rate in aqua regia is only 0.58mm / a, the corrosion rate in 3.5wt.% NaCl solution is only 0.00035mm / a, and the passivation current density is 2~5*10 -6 A / cm 2 (like figure 2 (C)), the corrosion rate of the original system in NaCl ...
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