3D amorphous alloy network reinforced boron-steel-based composite material with inlaid in-situ carbide particles, and preparation method of material

Abstract

The invention discloses a 3D amorphous alloy network reinforced boron-steel-based composite material with inlaid in-situ carbide particles, and a preparation method of the material. The preparation method mainly comprises the preparation process that strong carbide elementary metal powder and carbon black or graphite powder are mixed, are subjected to high-energy ball milling and then are subjected to low-temperature calcination to obtain an intermediate phase alloyed powder with the high reaction activity; high-energy ball milling is used to enable each intermediate phase alloy particle to becladded with a nickel layer on the surface; then iron powder, boron powder, molybdenum powder and nickel powder are added, high-energy ball milling is carried out to make partial iron powder have thenanometer size, and a compact blocky blank is obtained by utilizing high pressure; and the blank is placed into a vacuum dual-chamber thermal treatment furnace for vacuum sintering and is subjected to quick air cooling after sintering is completed, and the final needed composite material is obtained. The 3D amorphous alloy network reinforced boron-steel-based composite material with the inlaid in-situ carbide particles shows ultra-high elastic modulus, strength and hardness, and good plasticity and toughness, is simple in technology and easy for large-scale production to be carried out, and can be suitable for developing products such as gears, bearings, connecting rods, liner plates, rollers, tools and dies, and the products can be long in service life on the working conditions with hightemperature, high stress, hard abrasive wear and the like.

Description

technical field [0001] The invention relates to a steel-based metal composite material, in particular to a 3D amorphous alloy network reinforced boron steel-based composite material embedded with in-situ carbide particles and a preparation method thereof. Background technique [0002] In recent years, the study of amorphous alloy materials has become one of the research hotspots in the fields of ultra-high mechanical properties materials and soft magnetic materials. Although amorphous alloy material (also known as metallic glass) is a metastable material, it can only be transformed into a stable crystalline structure under certain conditions, so it can maintain its stable amorphous state for a long time. Compared with the crystalline phase of the same composition, amorphous alloys have more excellent mechanical properties (such as hardness, strength, wear resistance, corrosion resistance, and soft ferromagnetism, etc.), so their application potential is huge. At present, th...

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Problems solved by technology

At present, the amorphous alloy systems studied at home and abroad mainly include Fe-based, Co-based, Ni-based, Ti-based, Zr-based, Cu-based, Mg-based, La-based, etc., but the common problems are small size, high brittleness, high production cost, High requirements on equipment and process conditions greatly limit the practical application range of related materials

Chinese patent (CN106282849) discloses a method for preparing amorphous composite structural steel by copper mold casting (material formula: C 0.02-0.2%; Mn 13%-16%; Si 3%-5%; Cr10%-12% ; rare earth Re 0~2%, the rest is Fe element), the prepared composite structural steel has good mechanical properties (fracture strength is 2430~3280MPa, fracture strain is 12.64~26.96%), but it should be used as a structural material For use, its yield strength is obviously low (400-500MPa), and it is easy to undergo plastic deformation under low working stress, so it is difficult to take advantage of its high strength

The main disadvantages of this method are: it is not easy to make complex special-shaped parts; due to sand casting, there will be a large number of macro / micro defects in the composite material; the strength of the powder core skeleton is low, and under the action of casting impact, columnar carbides formed in situ uneven distribution

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