8 results about "Chromium nickel" patented technology

The invention relates to the field of furnace lining materials, in particular to a rapid repairing material for a tapping hole and a furnace lining of an intermediate frequency furnace. The rapid repairing material comprises the following components in parts by weight: 50-70 parts of tabular corundum, 10-20 parts of fused magnesite, 8-15 parts of alumina micro powder, 3-8 parts of nano zirconia, 5-12 parts of silicon carbide, 10-15 parts of silica sol and 2-5 parts of a reinforcing agent. Wherein the reinforcing agent is titanium calcium aluminate coated with chromium nickel boride. The tabular corundum is mainly used as an integral framework; the fused magnesite is matched with the alumina micro powder to form magnesium aluminate spinel with a high melting point; the nano zirconium oxide can fill pores and is excellent in toughness; the silicon carbide has the advantages of high hardness, high thermal conductivity and high melting point; the reinforcing agent is titanium calcium aluminate coated with chromium nickel boride, although the adding amount is small, the high-temperature strength, toughness and thermal shock resistance of the repairing material can be remarkably improved, and especially the long-term corrosion resistance can be remarkably improved.

The application discloses a manufacturing method of high-toughness steel guide, and relates to the technical field of metallurgy.The high-toughness steel guide is based on a 4Cr18Ni alloy of medium-carbon high-chromium nickel, and the element composition of the 4Cr18Ni alloy comprises C: 0.35-0.45%, Cr: 17-19%, Ni: 0.8-1.2%, Si: 0.5-1.0%, Mn: 0.5-1.0%, and the rest is Fe and inevitable impurities.Based on the element composition, the high-toughness steel guide is subjected to high-temperature normalizing-tempering heat treatment technology, so that the toughness of the guide material is greatly improved, the hardness and wear resistance of the guide material are considered, compared with a conventional quenching or annealing process, the heat treatment equipment and time cost are reduced, and the high-toughness steel guide has high production application value.

The traditional hydrogen-rich equipment adopts plastic and metal materials, and heavy metals such as plasticizer, antimony, chromium nickel iron and lead cadmium are easily separated out, and long-term drinking is easy to accumulate in the body and induce chronic diseases, and the existing water quality standard only limits the limit value, and the trace pollution hidden danger cannot be eradicated. The application discloses a kind of hydrogen-rich drinking water preparation device of stone hydrogen, which is composed of natural mineral compound formula and quartz ceramic reaction kettle;The mineral raw material contains three types of main mineral components, modified raw materials and slow-release fillers, and the long-acting slow-release hydrogen is compounded in proportion;The equipment cavity adopts high-purity quartz and special ceramic inert materials, and there is no corrosion and harmful substance separation, which guarantees the long-term drinking safety of hydrogen-rich drinking water from the source.

The present application relates to a kind of high chromium nickel-based superalloy 3D printing structural member heat treatment method.The above-mentioned heat treatment method includes the following steps: high chromium nickel-based superalloy 3D printing structural member is placed into heat treatment furnace;Vacuumizing treatment is carried out to heat treatment furnace;High chromium nickel-based superalloy 3D printing structural member in vacuum environment is heated for the first time, until heated to 600 ℃±10 ℃;High chromium nickel-based superalloy 3D printing structural member is kept for the first preset time period;High chromium nickel-based superalloy 3D printing structural member in vacuum environment is heated for the second time, until heated to 800 ℃±10 ℃;High chromium nickel-based superalloy 3D printing structural member is kept for the second preset time period;High chromium nickel-based superalloy 3D printing structural member is cooled to room temperature.The use of heat treatment method can improve the processing efficiency of high chromium nickel-based superalloy 3D printing structural member, reduce processing cost, improve high temperature endurance performance, so that tensile property, elongation and impact performance are all beyond the level of forging.

The application discloses a kind of vehicle-mounted new energy TMR auger surfacing structure and process, it is related to the manufacturing technology field of livestock machinery, including: auger matrix, buffer corrosion-proof layer on the outer edge wear-resistant area of spiral blade of the auger matrix and hard antifriction wear-resistant layer on the outer surface of the buffer corrosion-proof layer;The buffer corrosion-proof layer is high-chromium nickel-based alloy layer;The hard antifriction wear-resistant layer is the high-chromium cast iron composite layer containing coarse tungsten carbide particles;The hard antifriction wear-resistant layer is discontinuous fish scale array distribution.The application is designed by toughness corrosion-proof buffer layer and high-hardness wear-resistant surface layer compound, and adopts discontinuous fish scale array surfacing process, realizes the significant improvement of comprehensive performance, and the wear-resistant surface layer of coarse tungsten carbide and high-chromium cast iron constitutes high hardness, can absorb new energy drive system instantaneous impact and hard foreign matter impact energy, avoid hard wear-resistant layer collapse and fall off.

The invention relates to the technical field of smelting, and discloses vacuum smelting equipment for high-chromium nickel-based cast superalloy, which comprises a smelting furnace, a crucible is arranged in the smelting furnace, and the smelting furnace is rotatably mounted on a base; the feeding mechanism comprises a feeding bin located above the smelting furnace, the interior of the feeding bin is divided into a plurality of containing units through a plurality of rotating plates, casting raw materials of the high-chromium nickel-based cast high-temperature alloy can be placed in each containing unit, and a discharging opening is formed in the bottom of the feeding bin; the discharging mechanism comprises a material guide pipe inserted into the smelting furnace, the material guide pipe is located in a flow guide cylinder, the flow guide cylinder is rotationally connected with the side wall of the smelting furnace, the flow guide cylinder is installed on the base, and the smelting furnace inclines to enable a liquid metal material in a crucible to flow into the flow guide pipe and enter a pouring cavity. The smelting furnace, the guide cylinder and the pouring cavity are communicated with one another, the chance of making contact with the external environment in the feeding and discharging process is reduced, the preset vacuum degree can be well kept, and feeding and discharging are convenient.

The application discloses a production method of medium-high-chromium nickel-reduced austenitic stainless steel strip, which comprises the steps of continuous casting, heating in a heating furnace, rough rolling, finish rolling and the like, wherein the process parameters of the continuous casting step are adjusted to lay a foundation for rough rolling, and the temperature settings of each stage in the heating furnace ensure that the temperature inside and outside the slab is uniform; and because the heating speed is moderate, the slab will not be cracked due to excessive local thermal stress; the target temperature T in the second heating section is calculated according to a formula according to the actual composition; the setting of the target temperature can ensure that the continuous casting blank is heated away from the high-temperature two-phase zone temperature, and the growth of ferrite in high-temperature production is avoided, thereby reducing the risk of edge cracking and ensuring that the high-nitrogen continuous casting blank obtains the necessary heating temperature, and the phenomenon of being unable to be rolled in the rolling process is avoided. Through the whole-process process adjustment and optimization, the medium-high-chromium nickel-reduced austenitic stainless steel coil obtained is free of edge cracking, has good surface quality, and only has sporadic peeling defects or no peeling defects.

This application belongs to the field of metallurgical technology, and particularly relates to a smelting method for improving the purity of high-temperature alloys. Because chromium has a strong affinity for oxygen when the chromium content in high-chromium nickel-based high-temperature alloys is high, if titanium is directly added for alloying, titanium will preferentially react with residual oxygen and nitrogen to form TiO2 and TiN inclusions, resulting in extremely low titanium yield and deterioration of purity. The embodiments of this application break through the limitations of traditional single deoxidation modes. Based on the thermodynamic coupling reaction characteristics of oxygen, nitrogen, and titanium in the high-temperature alloy smelting process, a multi-stage thermodynamic deoxidation technology route with synergistic matching of temperature, deoxidizer type, and deoxidation depth is constructed. Through a sequential combination of carbon pre-deoxidation – strong deoxidizing metal + rare earth enhanced deoxidation – low-temperature titanium alloying, a controllable metallurgical transformation from high-oxygen-content raw materials to ultra-pure high-titanium melt is achieved. This solves the technical contradiction of difficulty in simultaneously achieving purity and precise composition control in high-chromium, high-titanium nickel-based high-temperature alloys due to the high activity of titanium and the difficulty in controlling oxygen and nitrogen.