[Object] To provide a cobalt-chromium alloy member suitable for use in a medical or aerospace device.

[Solving Means] There is provided a cobalt-chromium alloy member, which is obtained by performing heat treatment for 1 minute or more and 60 minutes or less at a temperature exceeding a recrystallization temperature of a cobalt-chromium alloy material and not more than 1100° C. on a cobalt-chromium alloy as-processed material obtained by causing a cobalt-chromium alloy material to be subjected to cold plastic working into a predetermined shape, the cobalt-chromium alloy material having a composition of, in terms of mass %, 23 to 32% of Ni, 37 to 48% of Co, and 8 to 12% of Mo, a remainder thereof containing Cr and an unavoidable impurity, the composition satisfying a relationship of 20≤[Cr %]+[Mo %]+[unavoidable impurity %]≤40, the cobalt-chromium alloy member having a tensile strength of 800 to 1200 MPa, a uniform elongation of 25 to 60%, and a breaking elongation of 30 to 80%.

A device and a method for continuous temperature gradient heat treatment of a rod-shaped material are disclosed. The furnace body of the device includes an upper heating zone and a lower heating zone inside, which are independently controlled in temperature by means of an upper heating power supply and a lower heating power supply. Moreover, both the upper heating zone and the lower heating zone are closed heating zones. The closed heat insulation plates could prevent heat loss and ensure precise temperature control of the upper heating zone and the lower heating zone. In the device, a vacuum pumping equipment is included; an annular radiation screen is configured between the upper heating zone and the lower heating zone, and the rod-shaped material is not in contact with the annular radiation screen The rod-shaped material conducts one-dimensional heat transfer along the axial direction.

A probe pin material including a Ag—Pd—Cu-based alloy essentially including Ag, Pd and Cu, B as a first additive element, and at least any element of Zn, Bi and Sn, as a second additive element. A concentration of the first additive element is 0.1 mass % or more and 1.5 mass % or less, and a concentration of the second additive element is 0.1 mass % or more and 1.0 mass % or less. A Ag concentration, a Pd concentration and a Cu concentration in the Ag—Pd—Cu-based alloy are required as follows: a Ag concentration (S.sub.Ag), a Pd concentration (S.sub.Pd) and a Cu concentration (S.sub.Cu) converted as given that a Ag—Pd—Cu ternary alloy is formed from only such three elements all fall within a predetermined range in a Ag—Pd—Cu ternary system phase diagram. The probe pin material is excellent in resistance value and hardness/wear resistance, and also is enhanced in bending resistance.

The disclosure relates to a method for manufacturing a biocompatible wire, a biocompatible wire comprising a biocompatible metallic material and a medical device comprising such wire.

The method for manufacturing a biocompatible wire comprises providing a workpiece of a biocompatible metallic material, cold working the workpiece into a wire, and annealing the wire, wherein a cold work percentage is 97 to 99%, wherein the cold working is a drawing with a die reduction per pass ratio in a range of 6 to 40%, and wherein the annealing is done in a range of 850 to 1100° C.

A demountable wire carrier 100 is for supporting loops of wire W and comprises a lower end-stop 110, an upper end-stop 120 and a plurality of frame members 130 extending between the end-stops. The carrier is shown standing inside a cylindrical loop-forming container 140 into which the wire W has been fed in the direction of Arrow A, so that the wire forms loops around the inside of the container wall. The introduction of the wire takes place when, prior to assembly of the carrier, only the lower end-stop 110 is positioned inside the container, so that the loops of wire rest on the lower end-stop 110. After all the wire has been introduced into the container 140, the frame members are connected to the lower end-stop, and the upper end stop is then connected to the frame members to complete assembly of the carrier.

The present disclosure relates an alloy wire rod and a preparation method and application thereof. The alloy wire rod is made of a tungsten alloy, and the tungsten alloy contains tungsten and an oxide of lanthanum. The alloy wire rod has a wire diameter of equal to or less than 100 μm; and the alloy wire rod has a tensile strength of greater than 3,800 MPa. The wire diameter of the alloy wire rod is equal to or less than 60 μm; the diameter of a push-pull core wire of the alloy wire rod is less than 350 μm; the elastic ultimate strength of the alloy wire rod is greater than 2,500 MPa; and the tensile strength of the alloy wire is greater than 4,200 MPa. In the present disclosure, the alloy wire rod having ultra-high strength and good toughness is obtained by doping an oxide of lanthanum.

A manufacturing process of a high-strength aluminum alloy wire/strip includes the following steps: A. subjecting an alloy to smelting and spray forming to obtain a high-strength Al—Zn—Mg—Cu aluminum alloy blank; B. subjecting the blank to semi-solid upset forging to form an ingot; C. subjecting the ingot to hot extrusion and then to vacuum annealing to form a coiled material; D. subjecting the coiled material to hot continuous rolling to obtain a wire blank; and E. subjecting the wire blank to solution heat treatment, multiple stretching treatments, annealing, and multiple continuous stretching treatments to obtain the high-strength aluminum alloy wire/strip. The high-strength aluminum alloy wire/strip has the characteristics of fine and compact grains, uniform structure, clear grain boundaries, no precipitates, and no layered structure affecting the stretching performance.

Carbon steel for a rack bar contains 0.50 to 0.55% by weight of carbon (C), 0.15 to 0.35% by weight of silicon (Si), 0.75 to 0.95% by weight of manganese (Mn), 0.025% by weight or less of phosphorus (P), 0.025% by weight or less of sulfur (S), 0.65 to 0.85% by weight of chrome (Cr), 0.20% by weight or less of molybdenum (Mo), 0.001 to 0.02% by weight of aluminum (Al), 5 to 50 ppm of boron (B), and iron (Fe) as a remainder and unavoidable impurities. A method for manufacturing the rack bar includes quenching, tempering, and drawing the carbon steel and warm forging the drawn carbon steel.

A spring wire which can be cold formed well at diameters of at least 9 mm, but has improved mechanical properties. The spring wire is manufactured from a steel including, in % by weight, C: 0.35-0.42%, Si: 1.5-1.8%, Mn: 0.5-0.8%, Cr: 0.05-0.25%, Nb: 0.020-0.10%, V: 0.020-0.10%, N: 0.0040-0.0120%, Al: ≤0.03% and as the remainder iron and unavoidable impurities, wherein the total content of impurities is limited to at most 0.2% and the impurities include up to 0.025% P and up to 0.025% S. The spring wire is in particular suitable for the manufacture of a tension clamp with optimized usage properties. Also, a method which enables the practice-oriented production of the spring wire.

Method for producing a steel part comprising providing a semi-finished product made of a steel comprising, by weight: 0.35%≤C≤0.60%; 0.15%≤Si≤0.5%; 0.8%≤Mn≤2.0%; 0.0003%≤B≤0.01%; 0.003%≤Mo≤1.0%; 1.0%≤Cr≤2.0%; 0.01%≤Ti≤0.04%; 0.003%≤N≤0.01%; S≤0.015%; P≤0.015%; 0.01%≤Ni≤1.0%; 0.01%≤Nb≤0.1%; optionally 0≤Al≤0.1%; 0≤V≤0.5%; and the remainder consisting of iron and unavoidable impurities. The method further including annealing this semi-finished product at a temperature strictly lower than the Ac1 temperature of the steel; cold forming the semi-finished product into a cold formed product; subjecting the cold formed product to a heat treatment comprising heating the cold formed product to a temperature greater than or equal to the Ac3 temperature of the steel; and holding the product at a holding temperature comprised between 300° C. and 400° C. for a time comprised between 15 minutes and 2 hours.