43 results about "Malleable iron" patented technology

A method for surface modification of cast iron, which uses high-energy superposition to modify the surface of cast iron materials, specifically a new type of surface modification technology for cast iron materials using electric explosion, gas explosion, and plasma energy superposition. This technology has the characteristics of one, two or more of the three surface modification technologies of plasma surface modification, gas explosion and electric explosion, and can be processed in an atmospheric environment with low cost and high processing efficiency. A reinforced modified layer with a thickness of 70‑150 μm is formed on the surface of the parts, which can improve the wear resistance, corrosion resistance and service life of cast iron parts by 1‑6 times. The invention is suitable for surface modification treatment of gray cast iron, malleable cast iron, nodular cast iron, vermicular graphite cast iron and alloy cast iron parts, and can be widely used in the fields of machinery industry, aviation manufacturing and the like.

The invention discloses a nano-modified aluminum alloy material and its preparation method and the energy-saving and environment-friendly electric fittings produced therefrom. The method comprises the following steps: 1) preparing silicon-coated carbon nanotubes: mixing silicon powder and carbon nanotubes Mechanical ball milling to fully mix silicon powder and carbon nanotubes to construct a core-shell structure to obtain silicon-coated carbon nanotubes; 2) Preparation of nano-modified aluminum alloy materials: adding silicon-coated carbon nanotubes obtained in step 1) to aluminum alloy Semi-solid stirring is carried out in the matrix, so that the added silicon-coated carbon nanotubes are uniformly dispersed in the aluminum alloy matrix, and then the temperature is raised for casting to obtain cast rods of nano-modified aluminum alloy materials. Compared with traditional malleable cast iron materials for electric fittings, the nano-modified aluminum alloy material prepared by the invention has the advantages of light weight, high strength and no galvanizing, and has higher strength than conventional aluminum alloys.

The invention provides a heat-resistant malleable cast iron material and a preparation method thereof. The heat-resistant malleable cast iron material has good performance; and the preparation method is simple in process, low in production cost and suitable for industrial production. Malleable cast iron is utilized as a substrate for the heat-resistant malleable cast iron material, wherein metal wire clusters formed by medium carbon steel wires and iron wires are distributed on the substrate; the diameter of the medium carbon steel wires and diameter of the iron wires are 1-2mm; the medium carbon steel wires and the iron wires account for 5-40% of the material by volume; and the diameter of the metal wire clusters is 10-15cm.

The invention provides an abrasion resistant malleable cast iron material and a preparation method thereof. The material has good performance, and the preparation method for the material is simple in process and low in production cost, and is suitable for industrial production. The abrasion resistant malleable cast-iron material takes malleable cast iron as a matrix; a metal wire group formed by high carbon steel wires and iron wires is distributed in the matrix; both the diameter of the used high carbon steel wires and the diameter of the used iron wires are 1 to 2 millimeters; the material contains 5 to 40 volume percent of the high carbon steel wires and the iron wires; and the diameter of the metal wire group is 10 to 15 centimeters.

The invention relates to a method for producing a malleable iron pipe by using reclaiming waste. The method is characterized in that a medium frequency furnace smelting process is adopted, foundry pig iron with waste machine iron, and raw materials include, by weight, 45-55 parts of foundry returns, 10-30 parts of waste rolled steel, 20-35 parts of the machine iron, 0.6-1 part of a carburetant, 0.25-0.5 part of ferrosilicon and 0-10 parts of malleable cast iron chippings. According to the method, the raw material structure and the matching process are optimized, the matrix structure of a cast workblank piece is improved, the product performance is stabilized, the phenomenon of casting grey pieces is reduced, and the rejection rate of cast products is reduced.

The invention belongs to the technical field of material preparation, in particular to a preparation method of a corrosion-resistant ductile malleable iron material. A forming device used in the method comprises a bottom plate, a rotating shaft is rotatably installed on the top of the bottom plate, and a driving motor is fixed on the top of the bottom plate A rotating wheel is fixed on the top of the drive motor, a rotating ring is fixed on the surface of the rotating shaft, a synchronous belt is movably connected between the rotating wheel and the rotating ring, a placing table is fixed on the top of the rotating shaft, and the top of the placing table is There is a placing groove, the placing groove is used for placing the casting mold, and two brackets are fixed on the side wall of the placing platform; the invention presses and produces a sheet-shaped corrosion-resistant layer, so that the corrosion-resistant layer is distributed on the surface of the ductile malleable iron material, and is compatible with the ductile malleable cast iron material. The ductile malleable iron material is integrated into one, and it can still protect the ductile malleable iron material when forging, and at the same time reduce the use of nickel and chromium, reduce the cost of use, and retain the characteristics of the ductile malleable iron material to the maximum extent.

The invention discloses a galvanized and dipped varnish malleable steel pipe fitting. A galvanized and dipped malleable steel pipe fitting, comprising a malleable steel pipe fitting base body, the surface of the malleable steel pipe fitting base body has a galvanized layer and a varnish layer in turn, the galvanized layer is an inner layer, and the varnish layer is an outer layer; the thickness of the galvanized layer is 50‑80μm; the thickness of the impregnated paint layer is 40‑70um, the adhesion is ≤ grade 1, and the impact resistance is ≥70kg.cm. In the present invention, since the galvanized malleable steel pipe fittings are impregnated with epoxy resin, the thickness of the galvanized layer of the present invention reaches 50-80 μm; the thickness of the impregnated paint layer reaches 40-70 μm, the adhesion is ≤ grade 1, and the impact resistance is ≥ 70 kg .cm; galvanized and dipped malleable steel pipe fittings also overcome the problem that galvanized malleable steel pipe fittings cannot withstand acidic and alkaline environment corrosion; also solve the problem of the surface color of traditional malleable steel galvanized pipe fittings and other pipelines and their connectors used in conjunction with it The problem of color mismatch; at the same time, it also improves the antirust effect of galvanized and dipped malleable steel pipe fittings.