摘要:
The present invention provides a producing method of a magnesium-based alloy wrought product capable of producing a plastic processing wrought product made of magnesium-based alloy with excellent productivity. A drawn material made of magnesium-based alloy obtained by drawing processing is subjected to plastic processing into a wrought product at processing temperature of lower than 250° C. Since the alloy structure is finely divided by the drawing processing, plastic workability can be enhanced in the plastic processing even if the processing temperature is lower than 250° C. Examples of the plastic processing are forging processing, swaging processing and bending processing.
摘要:
A steel wire of pearlite structure containing 0.8-1.0 mass % of C and 0.8-1.5 mass % of Si is disclosed. In the cross section of the steel wire the average hardness in a region up to 100 &mgr;m from the surface thereof is at least 50 higher that that in a deeper region based on micro-Vickers hardness. The steel wire is manufactured by working a wire rod having the abovementioned chemical composition through shaving, patenting and drawing processes, then strain-relief annealing the resultant wire, and thereafter subjecting the thus annealed wire to a short peening process. The steel wire can be produced through a drawing process without applying a quenching and tempering process, and are superior in heat resistance and fatigue strength.
摘要:
An evaporation material is used in manufacturing a VTR tape, a vertical magnetic recording thin film or the like. The evaporation material is a wire comprising a cobalt metal a cobalt--nickel alloy containing not more than 30 weight % of nickel, or a cobalt--chromium alloy containing not more than 30 weight % of chromium. This wire has a diameter of at least 1.0 mm and not more than 10 mm, a tensile strength of at least 400 MPa and not more than 1500 MPa, and an elongation and a reduction of area of at least 5%. The evaporation material has a prescribed crystal structure, with a face centered cubic lattice ratio of at least 0.1 and not more than 1. It is possible to obtain a wire having the above properties by heating the metal material to at least Tu.degree. C. and thereafter performing plastic working of reduction in area of at least 10% in a single pass at a temperature of at least Td.degree. C. and not more than (Tu+200).degree. C. Preferably, the cobalt metal or the cobalt--nickel alloy further contains 0.01 to 0.1 weight % of Mn, Cr, Mg, Zr or Ca. Preferably, the cobalt--chromium alloy further contains 0.01 to 0.1 weight % of Mn, Mg, Zr or Ca.
摘要:
Method for producing an elongated sintered article, characterized by the steps including filling powder material in a pipe, carrying out plastic deformation of the pipe filled with the powder material, and heating the pipe filled with the powder material to burn and/or sinter the powder material.The method of the present invention is advantageously applicable to production of wire or rod of ceramics, particularly so called new ceramics or fine ceramics, sintered alloys or their combination, which are difficult of shaping or moulding by conventional process such as wire-drawing, rolling or extrusion of powder material and are difficult of machining or processing after the powder material is sintered.
摘要:
The present invention relates to a sintered oxide superconducting wire and a method of fabricating the same. The sintered superconducting wire is made by packing powders of metal oxides, or a mixture of metal oxides and metal carbonates, each having an oxidation potential (.DELTA.G.degree.) higher than or equal to that of copper in a metallic cylinder, drawing said packed cylinder and sintering said drawn cylinder in air to form said wire.
摘要翻译:本发明涉及一种烧结氧化物超导线及其制造方法。 烧结超导线材是通过将金属氧化物或金属氧化物和金属碳酸盐的混合物的粉末包装在金属圆筒中,其氧化电位(DELTA G DEG)高于或等于铜的氧化电位(DELTA G DEG) 并在空气中将所述拉伸的圆筒烧结以形成所述线。
摘要:
The present invention relates to a sintered ceramic wire.Ceramic materials, such as A1N, Si.sub.3 N.sub.4 and Al.sub.2 O.sub.3, have various superior characteristics including heat-resistance, and sintered ceramic materials have been of interest as superconducting materials of high critical temperatures.However, various disadvantages are involved in the formation of the sintered ceramic materials as thin wires, and in the practical use thereof.The present invention elminates such disadvantages to provide a thin and long sintered ceramic wire having sufficient strength and toughness to avoid breakage.A sintered wire is made by placing powders of metal oxides, precursors of the desired sintered material, having oxidation potentials less than that of copper, in a tube of a high temperature oxidation-resistant metal. This product is worked to its final size and a sintering step is performed. The method is satisfactory for manufacture of ceramic superconductors.
摘要翻译:本发明涉及烧结陶瓷线。 诸如AlN,Si 3 N 4和Al 2 O 3的陶瓷材料具有各种优异的特性,包括耐热性,烧结陶瓷材料作为高临界温度的超导材料已成为人们所关注的焦点。 然而,作为细线的烧结陶瓷材料的形成和实际应用中涉及各种缺点。 本发明提供了这样的缺点:提供具有足够强度和韧性的薄且长的烧结陶瓷丝,以避免破损。 通过将金属氧化物(所需烧结材料的前体)的氧化电位小于铜的氧化电位的粉末放置在高温耐氧化金属管中来制造烧结丝。 将该产品加工至其最终尺寸并进行烧结步骤。 该方法对陶瓷超导体的制造是令人满意的。
摘要:
The magnesium alloy sheet disclosed herein has dispersed therein particles of an intermetallic compound containing an additive element (e.g., Al) and Mg (a typical example of which is Mg17Al12), and the ratio obtained by dividing the diffraction intensity of the main diffraction plane (4,1,1) of the intermetallic compound by the diffraction intensity of the c plane (0,0,2) of the Mg alloy phase in an XRD analysis of the surface of the sheet is 0.040 or more. The method includes: a casting step of producing a cast material composed of a magnesium alloy containing an additive element by continuous casting; a heat treatment step of holding the cast material at 400° C. or higher and then cooling the cast material at a cooling rate of 30° C/min or less to produce a heat-treated material; and a rolling step of subjecting the heat-treated material to warm rolling to produce a rolled sheet.
摘要:
A coil material capable of contributing to an improvement of the productivity of a high-strength magnesium alloy sheet and a method for manufacturing the coil material are provided. Regarding the method for manufacturing a coil material through coiling of a sheet material formed from a metal into the shape of a cylinder, so as to produce the coil material, the sheet material is a cast material of a magnesium alloy discharged from a continuous casting machine and the thickness t (mm) thereof is 7 mm or less. The sheet material 1 is coiled with a coiler while the temperature T (° C.) of the sheet material 1 just before coiling is controlled to be a temperature at which the surface strain ((t/R)×100) represented by the thickness t and the bending radius R (mm) of the sheet material 1 becomes less than or equal to the elongation at room temperature of the sheet material 1.
摘要:
There is provided a composite structural member having high rigidity even at a small thickness, the composite structural member being easily attachable to a target object. A composite structural member 1A includes a metal base material 10A, a resin formed article 11, and a resin film layer 12 that covers a surface of the metal base material 10A. The metal base material 10A is a plastically formed material formed by subjecting a flat sheet material having a thickness of 50 μm or more to press forming. The metal base material 10A and the resin film layer 12 are joined together using a constituent resin of the resin formed article 11. The composite structural member 1A includes the metal base material 10A and thus can have excellent strength and rigidity even at a smaller thickness. The composite structural member 1A includes the resin formed article 11. An attaching portion to the target object can be easily formed in the resin formed article 11. Thus, the composite structural member 1A has excellent mounting workability. The composite structural member 1A includes the resin film layer 12 and thus has excellent design properties.
摘要:
A coil material capable of contributing to an improvement of the productivity of a high-strength magnesium alloy sheet and a method for manufacturing the coil material are provided. Regarding the method for manufacturing a coil material through coiling of a sheet material formed from a metal into the shape of a cylinder, so as to produce the coil material, the sheet material is a cast material of a magnesium alloy discharged from a continuous casting machine and the thickness t (mm) thereof is 7 mm or less. The sheet material 1 is coiled with a coiler while the temperature T (° C.) of the sheet material 1 just before coiling is controlled to be a temperature at which the surface strain ((t/R)×100) represented by the thickness t and the bending radius R (mm) of the sheet material 1 becomes less than or equal to the elongation at room temperature of the sheet material 1.