86results about How to "Improve malleability" patented technology

The invention is directed toward a malleable bone putty and a flowable gel composition for application to a bone defect site to promote new bone growth at the site which comprises a new bone growth inducing compound of demineralized lyophilized allograft bone powder. The bone powder has a particle size ranging from about 100 to about 850 microns and is mixed in a high molecular weight hydrogel carrier, the hydrogel component of the carrier ranging from about 0.3 to 3.0% of the composition and having a molecular weight of about at least 10,000 Daltons. The composition contains about 25% to about 40% bone powder and can be additionally provided with BMP's and a sodium phosphate buffer.

A steel for a carburizing and a carburized steel component having a steel portion and a carburized layer with a thickness of more than 0.4 mm to less than 2 mm which is formed on an outside of the steel portion. A chemical composition of the steel for the carburizing and the steel portion of the carburized steel component satisfies simultaneously equations of a hardness parameter, a hardenability parameter, and an AlN precipitation parameter.

A method for preparing titanium metal from a titanium-containing material, comprising the steps of: preparing a M"TiF6 solution from a titanium-containing material, selectively precipitating M'2TiF6 from the solution by adding (M')aXb, utilizing the selectivity Precipitated M'2TiF6 prepares titanium. M" is a cation forming hexafluorotitanate, M' is selected from ammonium and alkali metal cations, X is selected from halides, sulfates, nitrites, acetates and nitrates Anion of , and a and b are 1 or 2.

The invention discloses super high-strength, high-toughness and wear-resistant steel and a preparation method thereof. The steel comprises the chemical composition by the weight percentage: 0.25 to 0.55 wt% of C, 1.50 to 2.50 wt% of Si, 1.50 to 2.20 wt% of Mn, 0.3 to 1.0 wt% of Cr, 0.2 to 0.8 wt% of Mo, 0.01 to 0.1 wt% of Re, less than 0.01 wt% of S, less than 0.01 wt% of P, and the balance Fe. Steel scrap or molten iron is smelted with an alloying material through an electric arc furnace or medium frequency induction furnace and then refined by VOD or LF, and molding is carried out by continuous casting or mold casting. The continuous casting billet or casting ingot is molded through rolling or forging and is subjected to special heat treatment, then the tensile strength of a part is 1800to 2000 MPa, the elongation percentage is 16 to 18%, the impact toughness aku is 60 to 80 J/cm<2>, and the hardness HRC is 55 to 62. The super strong wear-resistant steel not only has welding performance, but also has prominent plasticity, and is 2000 MPa-graded super high-strength steel having the elongation percentage at break reaching 18%.

The invention relates to a steel and a processing method for higher-strength fracture-splittable machine components that are composed of at least two fracture-splittable parts. Said steel and method are characterized in that the chemical composition of the steel (expressed in percent by weight) is as follows: C is between 0.40% and 0.60%; Si is between 0.20% and 1.00%; Mn is between 0.540% and 1.50%; Cr is between 0% and 1.00%; Ni is between 0% and 0.50%; Mo is between 0% and 0.20%; Nb is between 0% and 0.050%; V is between 0% and 0.30%; Al is between 0% and 0.05%; N is between 0.005% and 0.020%; the rest is composed of iron and smelting-related impurities and residual matter.

The invention relates to the field of steel for knitting machinery, in particular to high-wear-resistant steel for a knitting needle and a manufacturing method of the high-wear-resistant steel for the knitting needle. The high-wear-resistant steel comprises the following ingredients (weight percentage): C 0.8-1.2%, Si 0.1-0.4%, Mn 0.4-0.6%, Nb 0.1-0.15%, V 0.1-0.15%, Ni 0.1-0.3%, Cr 0.1-0.3%, and Fe and other unavoidable impurities in balance. A steel ingot casted after being subjected to smelting in an induction furnace is arranged in an electroslag remelting device as a consumable electrode for electroslag remelting, and then liquid metal drops in a water-cooling crystallizer at the bottom through a slag layer of a slag pool so as to be re-solidified to a steel ingot. After being heated a temperature range of 1000-1030 DEG C and kept for 3-5 hours, the re-solidified steel ingot is sequentially forged, bent, flattened, milled and subjected to thermal treatment to obtain cold working die steel with high combination of strength and toughness , high hardness, high wear resistance and the like.

The invention relates to an isothermal die forging technology for large-size high-strength aluminum alloy parts, and belongs to the technical field of aluminum alloy machining. According to the isothermal die forging technology, large-size aluminum alloy forging cake blanks undergo isothermal die forging formation in one step after being heated and thermally insulated for obtaining forge pieces, the forge pieces are taken out and cooled, and finally finished products are obtained; in the isothermal die forging process, the descending speed of upper dies is 0.1-0.2 mm/s. By selecting raw materials and strictly controlling forging parameters, continuous large deformation is realized on the condition that alloy crystal grains do not grow, and the large-size and high-performance aluminum alloy parts can be prepared with high efficiency and low cost. The isothermal die forging technology has the advantages that the operation is easy, the production efficiency is high, the product quality is high and the practicability is high, thereby being suitable for industrialized use and popularization.

The invention relates to the field of steel for knitting machinery and specifically relates to a high wear resistance steel for knitting needle and a manufacture method thereof. The high wear resistance steel for knitting needle comprises, by weight, 0.8-1.2% of C, 0.1-0.4% of Si, 0.4-0.6% of Mn, 0.1-0.15% of Nb, 0.1-0.15% of V, 0.1-0.3% of Ni, 0.1-0.3% of Cr and the balance of Fe and inevitable impurities. A steel ingot casted after melting in an induction furnace is employed as a consumable electrode and placed in an electroslag remelting apparatus for electroslag remelting; liquid metal passes through a slag layer of a slag bath, falls to a water cooling crystallizer below and solidifies into a steel ingot again; the steel ingot is heated to 1000-1030 DEG C, insulated for 3-5 h and treated with forging, turning, flattening and milling and heat treatment, so as to obtain a cold working die steel with characteristics of high strength and toughness cooperation, high hardness and high wear resistance, etc.

The invention relates to a method for preparing a DLC film on a surface of super martensitic stainless steel; 13Cr super martensitic stainless steel is used as a substrate for coating the film; a metal mesh cage is arranged in a vacuum cavity, a hollow glass brick with an explosion-proof port is placed in the vacuum cavity, a metal mesh cage is placed on an insulation glass brick, the front, rear,left and right faces of the metal mesh cage are opened, so that electronic escape forms a loop; the substrate is subjected to ultrasonic cleaning after polishing, and then the substrate is placed inthe metal mesh cage of the vacuum cavity for high pressure cleaning, the film to be coated of the substrate is upwards; a Si/Si-C transition layer is prepared before coating the film, so that the film-based bonding force is improved; and the DLC film is prepared through a plasma-enhanced chemical vapor deposition technology. The method has the following advantage that the high modulus of the substrate solves the problem of excessive stress during the preparation process of the DLC film. The DLC film prepared on the surface of the super martensitic stainless steel has a dense structure, obviously improves the substrate hardness and reduces friction and corrosion resistance.

An high strength forgeable Al-Mg-Si alloy and its production are both disclosed herewith. It contains Al, Si, Mg, Fe additive,Mn additive, Cr additive, Ti-B fining agent and Al-rare-earth alloy at certain ratio, prepared by: smelting, modifying in furnace, purifying, casting into bars, intimate treating, and water cooling. It has excellent tension resistance to meet demands of automotive control arm.

With notice taken of the facts that the conventional tripod joints are designed with particular attention paid to the aspect of strength, particularly the strength of the shaft and that in the aspect of durability there is some room in the ordinary use, while considering balance between strength and durability, the size of the shell of the outer joint member is reduced as much as possible, so that weight reduction and compactification of the tripod joint are achieved.

There are provided an intermetallic-compound superconductor that is high in superconducting transition temperature, and an alloy superconductor that is high in superconducting transition temperature and excels in malleability and ductility, as well as a method of making such a superconductor with good reproducibility and at a low cost of manufacture. This entirely new intermetallic compound superconductor is made of magnesium (Mg) and beryllium (Be) and has a chemical composition expressed by formula: Mg₁Be₂, has a hexagonal AlB₂ type crystallographic structure and has a superconducting transition temperature (T_c) of 35 K. An alloy containing this intermetallic compound excels in malleability and ductility and constitutes the alloy superconductor having a superconducting transition temperature (T_c) of 35 K and being low in specific resistance for normal conduction at a temperature ranging from the superconducting transition temperature to a room temperature. In the method of manufacture, a Mg containing feedstock powder and a Be containing feedstock powder are mixed together to form a mixture thereof which is, e.g., hot pressed to produce a semiconductor product.

There are provided an intermetallic compound superconductor that is high in superconducting transition temperature, and an alloy superconductor that is high in superconducting transition temperature and excels in malleability and ductility, as well as a method of making such a superconductor with good reproducibility and at a low cost of manufacture. This entirely new intermetallic compound superconductor is made of magnesium (Mg) and boron (B) and has a chemical composition expressed by formula: Mg₁B₂, has a hexagonal AlB₂ type crystallographic structure and has a superconducting transition temperature (T_c) of 39 K. An alloy containing this intermetallic compound excels in malleability and ductility and constitutes the alloy superconductor having a superconducting transition temperature (T_c) of 39 K. In the method of manufacture, a Mg containing feedstock powder and a B containing feedstock powder are mixed together to form a mixture thereof which is, e.g., hot pressed to produce a semiconductor product.