58 results about "Interstitial element" patented technology

The present invention relates to high strength / corrosion-resistant austenitic stainless steel with a carbon-nitrogen complex additive, and particularly, to an austenitic stainless steel with a carbon (C) and nitrogen (N) complex additive containing: 8-12 wt % of manganese (Mn); 15-20 wt % of chromium (Cr); less than 2 wt % of nickel (Ni); less than 4 wt % of tungsten (W); less than 2 wt % of molybdenum (Mo); 0.6-1.0 wt % of the total content (C+N) of carbon (C) and nitrogen (N); with the remainder being iron (Fe) and other unavoidable impurities, and to a method for manufacturing same. By controlling the content of the interstitial elements (C+N, C / N) and the substitution elements (Mn+Cr, Mn / Cr, or 0.5W+Mo), the austenitic stainless steel manufactured according to the present invention has a tensile strength of more than 850 MPa and uniform elongation of more than around 45%, thereby exhibiting excellent corrosion resistance as well as improving processability, and the content of Ni, a toxic alloy element, is minimized to improve biocompatibility, making the austenite stainless steel applicable to conventional and offshore structures, desalination facilities, and materials for oil and gas facilities / drilling, transportation and the like, which require high strength and high corrosion resistance, and may also be used to manufacture various functional parts for medical prosthetic materials, and accessories such as jewelry, watches, and the like.

A titanium alloy member is characterized in that it comprise 40% by weight or more titanium (Ti), a IVa group element and / or a Va group element other than the titanium, wherein a summed amount including the IVa group element and / or the Va group element as well as the titanium is 90% by weight or more, and one or more members made in an amount of from 0.2 to 2.0% by weight and selected from an interstitial element group consisting of oxygen, nitrogen and carbon, and that its basic structure is a body-centered tetragonal crystal or a body-centered cubic crystal in which a ratio (c / a) of a distance between atoms on the c-axis with respect to a distance between atoms on the a-axis falls in a range of from 0.9 to 1.1. This titanium alloy member has such working properties that conventional titanium alloys do not have, is flexible, exhibits a high strength, and can be utilized in a variety of products.

The first source and drain regions are formed in an upper surface of a SiGe substrate. The first source and drain regions containing an N type impurity. Vacancy concentration in the first source and drain regions are reduced in order to reduce diffusion of the N type impurity contained In the first source and drain regions. The vacancy concentration Is reduced by an interstitial element or a vacancy-trapping element in the first source and drain regions. The interstitial element or the vacancy-trapping element is provided by ion-implantation.

The invention relates to a processing method for a high-end smart phone titanium alloy nut, belonging to the technical field of nut processing. It includes the following steps: vacuum melting, forging, turning, rolling, stretching and rounding, mechanical surface treatment, stretching, annealing, broaching, straightening, polishing, drawing, turning, tapping. The present invention strictly controls the content of interstitial elements C, O, N and impurity element Fe, significantly improves the toughness of nuts, and the nuts produced by this method have better plasticity, toughness, good welding performance and low-temperature use performance, and its The combination of mechanical processing and manual processing ensures the quality of the product and improves the production efficiency of the product. It has the advantages of high production pass rate and high production efficiency, and solves the problems of difficult processing and production.

A steel volume is modeled in a computer by means of a plurality of volume elements. The state of the steel volume at a given time comprises, for each volume element, characteristic quantities of an enthalpy existing at said time in the respective volume element and percentages, in which the steel is available in the respective volume element at the time in austenite, ferrite and cementite phases. For at least one volume element, the computer determines the time gradient of the characteristic quantities by resolving thermal conductivity and phase transition equations. One of the characteristic quantities is a locally invariable mean interstitial element concentration within the volume element in the austenite phase thereof.