Corrosion-resistant high-damping Fe-Cr-Mo-Cu alloy and preparation method thereof
A high-damping alloy, fe-cr-mo technology, applied in the field of improving the damping performance and corrosion resistance of Fe-Cr-Mo-based alloys, can solve the problems of unsatisfactory vibration damping effect and unsatisfactory corrosion resistance, etc., to achieve Excellent mechanical properties, low cost, and the effect of expanding the scope of application
Inactive Publication Date: 2012-07-04
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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[0004] The purpose of the present invention is to provide a Fe-Cr-Mo-Cu vibration damping alloy with high damping performance and good corrosion resistance and its preparation method, to solve the problem that the vibration damping effect of Fe-Cr-Mo alloy in the prior art needs to be improved , unsatisfactory corrosion resistance and other issues
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[0021] Industrial pure iron and 99.9wt.% high-purity metals Cr, Mo, and Cu are used as raw materials, and the composition of the alloy is: 13wt.% Cr, 2.5wt.% Mo, 0.5wt.% Cu, and the rest is Fe. The alloy is smelted in a vacuum induction furnace. The specific processing technology and heat treatment system are as follows: Forging technology is used to reduce defects such as porosity, pores, and segregation in the alloy, so as to reduce the hindrance to the movement of the magnetic domain wall. After annealing at 1100±10°C for 20 minutes and then furnace cooling, a Fe-Cr-Mo-Cu alloy with a complete ferrite structure is obtained. The damping performance of the alloy is 0.052 (ε=3.5×10 -5 ), which is twice the damping performance of the alloy before adding Cu (such as figure 1 ). The pitting loss mass fraction of the alloy was also significantly reduced, from 37% to 20% (such as figure 2 ). As shown in Figure 3(a)-(b), it can be seen from the grain boundary SEM results of the...
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The invention relates to improvement technology of the damping performance and corrosion resistance of Fe-Cr-Mo alloy, and particularly relates to a Fe-Cr-Mo-Cu corrosion-resistant high-damping alloy and a preparation method thereof. Fe-Cr-Mo damping alloy is used as a base, and other alloy elements are added to improve the damping performance and corrosion resistance of the alloy. According to the invention, through processes of vacuum melting, forging, heat treatment and the like, the precipitation of grain boundary carbides is inhibited; chromium depleted regions near the crystal boundary are effectively reduced; the alloy damping performance is greatly improved; and the corrosion resistance of the alloy is improved. The corrosion-resistant high-damping alloy of the invention is melted by a vacuum induction melting method; after casting, forging begins at 1100+ / -10 DEG C, and the forging finishing temperature is 900+ / -10 DEG C. The heat treatment process comprises: performing heat preservation at 1100+ / -10 DEG C for 15-25 min, cooling the furnace to room temperature. The corrosion-resistant high-damping alloy of the invention has excellent comprehensive performance such as comparable mechanical properties to common austenitic stainless steel, a wide application temperature range, good processing performance, and the like, and can be used as a high damping structure material.
Description
Technical field: [0001] The invention relates to a technology for improving the damping performance and corrosion resistance of Fe-Cr-Mo-based alloys, in particular to a Fe-Cr-Mo-Cu corrosion-resistant high-damping alloy and a preparation method thereof. Background technique: [0002] With the rapid development of industry, the vibration and noise generated by mechanical parts have seriously affected the precision of instruments and the service life of equipment. In the field of national defense and aerospace technology, vibration and noise reduction is very important. Therefore, reducing mechanical vibration and equipment noise has become a subject of increasing concern, and finding more effective methods of reducing vibration and noise has become one of the research directions. The vibration and noise reduction methods that people usually use are based on the dynamics of vibration, through special design or increasing the mass of components to reduce the radiation transmi...
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Inventor 胡小锋李秀艳张波戎利建李依依
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI