摘要:
An object of the present invention is to provide copper alloy which has a dimensionless performance index value M satisfying an inequality: M>400 in either a binary system alloy composition containing Cu and Zr, or a ternary system alloy composition containing Cu, Zr, and B. In the copper alloy of the present invention, a composition by atomic percent is expressed by a composition formula: Cu100−(a+b)ZraBb, and a dual phase structure having a layered structure including a plurality of Cu matrices constituted by grain particles and an eutectic phase constituted by the Cu matrix and any of a Cu—Zr compound and a Cu—Zr—B compound is constituted. Part of each of the grain particles contacts other grain particles, and the “a”, the “b”, and the “(a+b)” satisfy 0.05≦a≦8.0, 0≦b≦4.0, and a+b≦8.0.
摘要翻译:本发明的目的是提供一种铜合金,该铜合金在含有Cu和Zr的二元系合金组合物中含有满足不等式M> 400的无量纲性能指标值M,或含有Cu,Zr和 B.在本发明的铜合金中,原子百分比的组成由下列组成式表示:Cu 100 - (a + b)Z a B B 并且具有层叠结构的双相结构,该双相结构包括由晶粒和由Cu基构成的共晶相和由Cu-Zr化合物和Cu-Zr-B中的任一种构成的多个Cu基体 化合物构成。 “a”,“b”和“(a + b)”分别满足0.05 <= a <= 8.0,0 <= b <= 4.0,以及 a + b <= 8.0。
摘要:
A challenge of the present invention is to develop a method for repeatedly forming a reverse transferred pattern in a simple and efficient manner onto the surfaces of Zr based, Ti based, Cu based, Ni based and Fe based metallic glass that have supercooled liquid temperatures of not lower than 400° C. and are also required to be molded at not lower than 400° C. (a) An image pattern is converted into bitmap data being mirror reversed with respect to a real image, (b) high energy density light 15 is repeatedly flashed, and the surface of a mold 20 is scanned while one of dot holes 24 is formed by one-time irradiation, to form an image pattern as dots assembled pattern 21 onto the surface of the mold 20 in accordance with the bitmap data, and (c) the dots assembled pattern 21 is reverse-transfer molded onto a metallic glass 1 within a supercooled liquid temperature range Tg-Tx by means of the mold 20 which is for dots assembled pattern formation.
摘要:
A chill vent made of copper or copper alloy has a concave section and a convex section, each being subjected to removal of flat parting portions on both side surfaces, and a gas exhaust passage is formed over the entire width region. These gas exhaust passage portions have side surfaces and back surfaces which are enclosed in hard U-shaped guide frames. It is possible to effectively avoid occurrence of leakage or flashing of molten metal due to a plastic deformation of the chill vent by a mold fastening force applied upon assembly of a die-casting mold, which may occur when a copper or copper alloy having a superior cooling property as the material for chill vent.
摘要:
A continuous repetitive method of rolling a series combination of asymmetric rolling and skin pass rolling operations is provided. Differential-speed rolling is performed as the asymmetric rolling, and a winder temporarily winds a metal strip with a collapsed plate shape by traverse winding (loose winding which allows the metal strip to be wound in a zigzag manner). Then, the skin pass rolling is performed, and orderly winding is performed in a coil form. In the flow of rolling, tandem rolling may be performed by arranging two or more rolling mills side by side so that the asymmetric rolling and the skin pass rolling operations are continuously performed without the traverse winding therebetween.
摘要:
A beryllium copper alloy is provided, having a thickness “t” in a range from 0.05 mm to 0.5 mm and having an alloy composition consisting by weight (or mass %), of Cu100−(a+b)NiaBeb, wherein 1.0≦a≦2.0, 0.15≦b≦0.35, and 5.5 ≦a/b≦6.5. The beryllium copper alloy also exhibits a 0.2% proof stress equal to or above 650 MPa, an electric conductivity equal to or above 70% IACS, and a bending formability defined by a ratio of R/t=0, wherein “R” is a maximum bend radius before cracking at a bent portion when the beryllium copper alloy is bent into a V shape at a right angle.
摘要翻译:提供铍铜合金,其厚度“t”在0.05mm至0.5mm的范围内,并具有由Cu100-(a + b)NiaBeb的重量(或质量%)组成的合金组成,其中1.0 <= a <= 2.0,0.15 <= b <= 0.35和5.5 <= a / b <= 6.5。 铍铜合金还表现出等于或高于650MPa,电导率等于或高于70%IACS的0.2%屈服应力和由R / t = 0的比率定义的弯曲成形性,其中“R”为 当铍铜合金以直角弯曲成V形时,在弯曲部分开裂之前的最大弯曲半径。
摘要:
A copper base rolled alloy has a copper base alloy composition containing 0.05 percent by mass or more, and 10 percent by mass or less of at least one type of element selected from Be, Mg, Al, Si, P, Ti, Cr, Mn, Fe, Co, Ni, Zr, and Sn, wherein the X-ray diffraction intensity ratio I(111)/I(200) of (hkl)plane measured with respect to a rolled surface is 2.0 or more.
摘要:
An injection mold for casting a semi-solidified Fe alloy includes a scalping gate for eliminating surface oxide film of a semi-solidified Fe alloy injected into the mold cavity from a pressure chamber. The scalping gate is arranged between the pressure chamber and a runner that is in communication with the mold cavity. The mold halves and the scalping gate are each formed of a copper alloy having a thermal conductivity of not less than 120 W/(m·K) and a hardness of not less than 180 HB. The mold halves and the scalping gate each have a cermet layer consisting essentially of at least one member selected from a group consisting of Co, Cu, Cr and Ni. The cermet layer is formed by electro-spark deposition, via an intermediate layer of Ni alloy, which is also formed by electro-spark deposition.
摘要:
In the production equipment for a precipitation hardened alloy strip, a solution treatment unit includes a heating chamber provided to heat the material alloy strip having a precipitation hardening alloy composition to a temperature of not lower than a recrystallization temperature but not higher than a melting point, a cooling chamber located adjacent to the heating chamber, and a pair of cooling rolls incorporated in the cooling chamber to hold therebetween and cool down the material alloy strip heated in the heating chamber. This production equipment can quench the material alloy strip to form a solid solution supersaturated with precipitation hardening elements and thereby forming a precipitation hardened alloy strip having a good shape and a favorable surface condition.
摘要:
A heat treatment method according to the present invention includes a preliminary-state-generating step of heat-treating an alloy that undergoes multiple-step transformation with temperature by bringing the alloy in contact with a contact-type heating element for 0.01 sec or more and 3.0 sec or less, the contact-type heating element being adjusted to a particular temperature within a preliminary-state-generating temperature region determined on the basis of a first temperature related to a particular first transformation of the alloy and a second temperature, which is higher than the first temperature, related to a particular second transformation of the alloy so as to generate a preliminary state in the alloy.
摘要:
The present invention provides a metal sheet rolling method of rolling a metal sheet with a pair of rolls, as well as a rolled sheet manufactured by the metal sheet rolling method. In the metal sheet rolling method, respective interfaces between the pair of rolls and the metal sheet have mutually different frictions. Additionally at least one of the interfaces may be lubricated by a procedure other than lubrication by coating of a liquid lubricant agent. Alternatively at least one of the interfaces may be subjected to surface treatment by a procedure other than lubrication, or otherwise the pair of rolls may be made of mutually different materials.