1201results about How to "Improve corrosion resistance" patented technology

Tough ultra-strength stainless steel and method for manufacturing the same

The invention discloses a high-flexibility high-strength stainless steel and a method for making the same, wherein the method comprises the following steps of: 1) preparing parent alloy, the chemical compositions by weight percentage of which are: less than or equal to 0.03 percent of C, less than or equal to 0. 10 percent of Mn, less than or equal to 0.10 percent of Si, less than or equal to 0.002 percent of S, less than or equal to 0.006 percent of P, 6.0 to 13.0 percent of Cr, less than or equal to 0.05 percent of Al, less than or equal to 0.10 percent of Cu, less than or equal to 0.05 percent of Ti, the balance Fe and unavoidable impurities; 2) melting an electrode with a vacuum induction furnace, in which the parent alloy is prepared with pure iron, nickel, and other metal material for melting the electrode; 3) vacuum consumable remelting, at a melting speed of between 180 and 220 Kg/h; 4) forging, in which steel ingots are heated at a temperature of 1180+-20 DEG C, with the temperature maintained for 3 to 6 hours, and are upset and drawn twice, and the forging temperature is above 850 DEG C. The stainless steel of the invention has matched combination properties including 1800Mpa strength, 1400 Mpa yield strength, 50J impact ductility, more than 100 Mpa fracture toughness.

Water-based ultraviolet curing coating

The invention relates to water-based ultraviolet curing coating, containing water-based ultraviolet curing resin, a photo initiator, accessory ingredients and water; the water-based ultraviolet curingcoating is characterized in that: the water-based ultraviolet curing coating also comprises acrylic emulsion and corrosion inhibitors, all constituents are as follows by mass fraction: 15-45 percentof the water-based ultraviolet curing resin, 15-45 percent of the acrylic emulsion, 2-10 percent of photo initiators, 2-5 percent of the corrosion inhibitors, 0.2-1 percent of the accessory ingredients, and the balance of water; wherein the acrylic emulsion has the function of enhancing adhesive force, so as to greatly improve the adhesive force of the coating on a metal surface, be beneficial toimproving the anti-corrosion performance of coatings without needing reactive diluent to adjust the adhesive force of the coating and reduce the harm of the reactive diluent to environment and human body; wherein the defined amount of the corrosion inhibitors increases the anti-corrosion performance of the coating. The water-based ultraviolet curing coating is particularly suitable for protectivedecoration of the surfaces of metal bases,such as iron, aluminum, copper, nickel and the like, for a medium to long period.

High-dimension stable corrosion-resistant martensite steel and preparation method of steel structural material

The invention discloses a high-dimension stable corrosion-resistant martensite steel and a preparation method of a steel structural material. The martensite steel comprises the following chemical components of: C being less than or equal to 0.10, Cr being 14.0-15.5, Ni being 4.2-6.0, Cu being 2.0-3.5, Nb being 0.2-0.40, Mn being less than or equal to 0.7, Mo being 0.3-0.8, Si being less than or equal to 1.0, P being less than or equal to 0.02, S being less than or equal to 0.015, and the balance being Fe. The preparation method of the above steel structural material contains the following steps of: 1) weighing each component according to the weight percentage of each component; 2) carrying out vacuum induction melting; 3) casting and remelting electrode bars; 4) remelting electroslag to obtain steel ingots; 5) carrying out homogenization heat treatment; 6) forging wire rod and board strip blank materials; and 7) carrying out finishing, flaw detection and cold machining on the wire rod and board strip blank materials. By the formation of high-toughness low carbon lath-shaped martensite and enhanced means of supplementing molybdenum, copper and other alloy elements, the martensite steel with high strength and toughness, high corrosion resistance and wear resistance is obtained. The preparation method meets requirements such as strong corrosion resistance, excellent abrasion resistance, good machinery processing property, high dimension stability and ferromagnetism.

High-strength Mg-Gd-Y-Zn-Mn alloy

ActiveCN102732763AImprove room temperature toughnessImprove corrosion resistanceMechanical properties of carbon nanotubesMn alloy
The present invention relates to a high-strength Mg-Gd-Y-Zn-Mn alloy. The alloy comprises the following alloying elements distributed in the alloy, by weight, 8.2-10.2% of Gd, 5.0-6.0% of Y, 0.5-4.0% of Zn, 0.5-0.8% of Mn, and the balance of Mg and inevitable impurities. The alloy is prepared by adopting the following process: material preparing, vacuum melting and ingot casting, uniformization annealing, extrusion and heat treatment. According to the present invention, Mg, Zn, Gd and Y form a large amount of long period phases in the Mg-Gd-Y-Zn-Mn alloy so as to provide a significant dispersion strengthening effect, and the time effect treatment is adopted to introduce the strengthening effect of the metastable phase; the process is a preparation method for the high-strength deformation Mg alloy, wherein the method integrates solid solution strengthening, precipitation strengthening and deformation strengthening; the method has characteristics of simple process, strong portability, easy operation and low cost; with the method, tensile strength and yield strength of the allay at the room temperature are significantly improved, and difficulty of allay application limitation due to low mechanical property is solved so as to expand the application range of the Mg alloy.

Aluminium alloy conductor for automotive wires and manufacturing method thereof

The invention discloses an aluminium alloy conductor for automotive wires, which has the advantages of high heat resistance, conductivity, tensile strength, extensibility and fatigue resistance, and a manufacturing method thereof. The alloy contains 0.3 to 0.8 weight percent of iron, 0.05 to 0.20 percent of silicon, 0.1 to 0.5 weight percent of magnesium, 0.1 to 0.3 weight percent of copper, 0.001 to 0.04 weight percent of boron, 0.001 to 0.04 weight percent of zirconium, 0.001 to 0.04 weight percent of yttrium, and the balance of aluminium and inevitable impurities, wherein one or two elements, except the aluminium and the inevitable impurities, account for 0.1 to 2.0 weight percent. The manufacturing method comprises the following steps of: adding the iron, silicon, magnesium, copper, boron, zirconium, yttrium and aluminium into a smelting furnace; smelting, and casting and rolling; performing intermediate annealing treatment; drawing into aluminium alloy filaments with the diameterof 0.5mm; and stranding into wire cores, and performing annealing treatment. The conductor prepared by the method has the tensile strength of 210MPa and above, the elongation at break of over 10 percent, the conductivity of over 58 percent, and excellent heat resistance and flexibility.
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