摘要:
The present disclosure is directed to methods and compositions for boronizing metal and in particular ferrous surfaces. It has been discovered that if hydrocarbons are processed in metallic equipment which have been previously boronized, that coke formation and deposition which is commonly experienced at high temperatures can be minimized if not totally eliminated. The compositions utilized for this purpose are comprised of boron or boron compounds contained in an organic solvent or carrier together with specific activating materials.
摘要:
This invention is addressed to a process for the diffusion coating of metals which are capable of forming a compound or a solid solution with boron by contacting the metal with boron at a temperature greater than 1350.degree. F.
摘要:
A method of producing highly abrasion resistant plastification screws and plastification cylinders for injection molding machines in which plastic materials with abrasive fillers are processed, the machined plastification elements being borided in a boron carbide packing and then hardened or tempered, the method involving the selection of a tool steel or temper steel whose austenitization temperature is below the highest boriding temperature, so that the elements can be hardened or tempered immediately after the boriding treatment, by chilling them with an inert gas, while they are still in contact with the boriding packing.
摘要:
The present invention relates to powdered boriding compositions for the production of single-phase boride layers on metal articles being substantially free from cracks in the case of mechanical stress, which comprise an activator and a mixture of a boron-releasing agent and an unreactive refractory material, such as silicon carbide.
摘要:
This invention is addressed to a process for the diffusion coating of metals which are capable of forming a compound or a solid solution with boron by contacting the metal with boron at a temperature greater than 1350.degree.F.
摘要:
The disclosure provides a method of manufacturing a cutting blade for an agricultural implement. The method includes forming the cutting blade to define a final shape having an exterior surface. The cutting blade is treated with a surface diffusion hardening process to form a surface hardened layer disposed over a core layer. The surface hardened layer is very thin, approximately 0.1 mm, and exhibits an apparent hardness equal to or greater than 1000 HV. After the surface diffusion hardening process, the cutting blade is treated with a through hardening process, such that the core layer exhibits a Rockwell Hardness C Scale value between the range of thirty five (35) and fifty five (55).
摘要:
A process comprising: placing a boronizing powder composition in the interior of a metal pipe comprising a first end, a second end, an inside surface and an outside surface; heating the pipe in a vessel having an interior, to a temperature from 1400° F. to 1900° F., thereby forming spent boronizing reaction gases and a borided layer on the inside surface, wherein the vessel interior has an atmosphere that surrounds the outside surface of the metal pipe; and flowing the spent boronizing reaction gases into the atmosphere surrounding the outside surface of the pipe, thereby forming an oxygen-depleted atmosphere.
摘要:
A method for treating metal parts is provided that includes positioning a metal part within a reactor chamber, and positioning a boron containing solid form having a porosity of at least 10% by volume in the reactor chamber adjacent to the metal part. A halide containing gas may be introduced to the reactor chamber that the boron containing solid form is present in. The at least one halide containing gas and the boron containing form react to provide a gas that borides the metal part.
摘要:
An article having good wear resistance includes a first component including a boride coating and a second component including a cobalt-chromium-molybdenum coating that is in sliding contact with the boride coating of the first component.