摘要:
A method of depositing tantalum to form a tantalum coating on substrates is provided. The method comprises preparing a tantalum-containing mixture having a tantalum donor, a halide activator, and a tantalum halide activator; preparing a substrate for deposition of the tantalum from the tantalum-containing mixture; and heating the substrate and the tantalum-containing mixture to a given temperature to deposit the tantalum on the substrate.
摘要:
A method and a device for forming a flange at the end of a tubular, thin-walled element of a synthetic resin, said method comprising the steps arranging the element on a cylindrical moulding body having a gradually flaring, radial guide surface, introducing the end slipped onto the moulding body into a space containing a heating medium in order to heat the synthetic resin up to the softening point, producing an axial pressure between the element and the moulding body in order to shift the wall of the element over a given length along the guide surface, introducing the moulding body with the element into a space containing a cooling medium and finally by separating the mould from the moulded element, said device is principally distinguished in that the moulding body is provided with a cylindrical guide surface and a radially extending guide surface, between which surfaces a gradual junction is formed.
摘要:
Mechanical parts of ferrous alloys are provided with a coating consisting essentially of FeSn.sub.2, FeSn and FeSnC.sub.x with x ranging from 0.7-1.3 by holding the part to be treated in an oven at a temperature ranging from 400.degree. to 700.degree. C while the gaseous atmosphere inside the oven is comprised of a mixture of a vapor of a tin halide and a reducing gas.
摘要:
A case-hardening method for forming a hardened layer on the surface of carbon steel of high toughness and hardness is provided which comprises forming a powdered mixture of titanium in an amount of 5 to 30% by weight of said mixture, chromium in an amount such that the weight ratio of chromium to titanium is within the range of 2 to 10, alumina and a catalyst, embedding carbon steel in said powder mixture, and then subjecting said mixture to a heat treatment to form a hardened layer mainly composed of titanium carbide. The method may also be carried out by coating the surface of carbon steel with alumina, preparing a powder mixture containing titanium in an amount of 5 to 30% by weight of said mixture chromium in an amount such that the weight ratio of chromium to titanium is within the range of 2 to 10, alumina and a catalyst, then embedding said alumina-coated carbon steel in said powder mixture, and then subjecting said mixture to a heat treatment to form a hardened layer mainly composed of titanium carbide.
摘要:
A method for forming a carbide layer of a metal selected from Ti, Zr, Hf, V, Nb, Ta, Mo and N or mixtures thereof on the surface of an iron or ferrous alloy article in a powdery treating material comprising packing said article in the mixed powders of a tetrafluoroborate and said metal and heating said article within said mixed powders, thereby forming a very hard carbide layer of said metal on the surface of said article. The method of this invention can be carried out without employing a nonoxidation atmosphere and can improve greatly the wear resistance of iron and ferrous alloy articles.
摘要:
According to an exemplary embodiment, a gas turbine element made of a hardened titanium alloy may be provided. The hardened titanium alloy may be made by a process which may include but may not be limited to, obtaining an element made of titanium alloy, treating a surface of the element made of titanium alloy with beryllium using diffusion process, and forming a titanium beryllide diffusion layer to a predetermined depth from the surface.
摘要:
Disclosed is a process for producing an alloyed, in particular multiple-alloyed aluminide or chromide layer on a component by alitizing or chromizing. First a green compact layer (9) consisting of a binder (5) and metal particles (7) is deposited on the component (1) to be coated and then alitizing or chromizing is carried out, binder and metal particles being deposited on the component separately from one another, first the binder and then the metal particles. A turbine component produced by this process is also disclosed.
摘要:
Method for manufacturing a zinc-coated nonferrous metal component for the production of a corrosion-protected vehicle body in a mixed construction includes providing an untreated nonferrous metal component and applying a coating by zinc diffusion onto the nonferrous metal component. A zinc dust mixture is diffused at a temperature of from 300 to 600° C. so as to form a zinc diffusion layer.
摘要:
Methods and apparatus for forming a metal coating on a surface of a workpiece are provided. The method includes positioning the workpiece in a microwavable chamber, positioning a coating material in the microwavable chamber, and heating at least the workpiece and the coating material using microwave range electromagnetic energy such that a diffusion coating of the coating material is formed on the surface of the workpiece.
摘要:
This invention, in one aspect, relates to a method of applying a corrosion-resistant coating on an article and is particularly, but not exclusively, concerned with a method of applying a corrosion-resistant coating on an Nd—Fe—B magnet. In another aspect, the present invention relates to a method of applying a coherent coating on the surfaces of the particles of a powder. Such powder may be one which is susceptible to oxidative corrosion and/or one which is used to form a magnet (e.g Nd—Fe—B powder).