58results about How to "High heat and corrosion resistance" patented technology

A Ni-based alloy hardened with the γ′ phase, which is able to exhibit not only superior strength at high temperatures, but also excellent hot corrosion resistance and oxidation resistance at high temperatures in spite of containing no Re or reducing the amount of Re. The Ni-based superalloy contains, by weight, C: 0.01 to 0.5%, B: 0.01 to 0.04%, Hf: 0.1 to 2.5%, Co: 0.8 to 15%, Ta: more than 0% but less than 8.5%, Cr: 1.5 to 16%, Mo: more than 0% but less than 1.0%, W: 5 to 14%, Ti: 0.1 to 4.75%, Al: 2.5 to 7%, Nb: more than 0% but less than 4%, V: 0 to less than 1.0%, Zr: 0 to less than 0.1%, Re: 0 to less than 9%, at least one of platinum group elements: 0 to less than 0.5% in total, at least one of rare earth elements: 0 to less than 0.1% in total, and the rest being Ni except for unavoidable impurities.

The invention discloses a powder core wire material for preparing a nickel-based coating, a preparation method and application of the coating, and belongs to the field of thermal spraying in material processing engineering. The atomic percentage of the drug core composition is: Cr: 20-35at.%; B: 30-55at.%; C: 2.5-5.5at.%; Ni: balance; the tape used for the powder core wire sheath is Ni-Cr tape ;Powder core wire material filling rate: 32%. When preparing nickel-based coatings containing Cr23C6 ceramic particles reinforced phase by arc spraying, the substrate needs to be pretreated first. Spraying process: voltage 28-34V; current 160-220A; spraying distance 190-210mm; compressed air pressure 0.5-0.6MPa . The invention can obtain a coating with high hardness, good wear resistance and corrosion resistance, and improves the service stability of water-cooled wall tubes and superheater tubes in waste recycling WTE garbage incinerators.

The invention discloses an anti-molten aluminum corrosion coating. The coating is characterized by comprising at least three sub-coatings, namely the alloy layer arranged on the surface of a substratein a coating mode, a ceramic layer arranged on the surface of the alloy layer in a coating mode and a hole sealing layer arranged on the surface of the ceramic layer in a coating mode. The anti-molten aluminum corrosion coating has high-temperature abrasion resistance, aluminum sticking resistance, molten aluminum corrosion resistance, large bonding strength and excellent thermal shock resistance. Moreover, a preparation method of the anti-molten aluminum corrosion coating is easy to implement, coating materials are easy to obtain, and the production cost is reduced.

The invention relates to a high-temperature alloy core rod applied to planetary rolling mill for rolling copper and copper and a preparation method of the high-temperature alloy core rod, and belongsto the technical field of metal machining. The high-temperature alloy core rod comprises 11.50-14.00% of Cr, 3.80-5.2% of Mo, 5.50-6.50% of Al, 0.50-1.00% of Ti, 1.80-2.80% of Nb and Ta, 0.005-0.020%of B, 0.08-0.20% of C, 0.050-0.20% of Zr, 0-0.50% of Si, 0-0.50% of Mn, 0-0.015% of P, 0-0.015% of S, 0-2.50% of Fe and the balance Ni. In the preparation process, a mother alloy cast ingot is prepared through vacuum induction smelting, vacuum induction remelting is carried out, a high-temperature alloy core rod blank is prepared through investment casting, the blank is subjected to hot isostaticpressure treatment and subsequent heat treatment, then the blank is polished and subjected to finish machining, and finally the core rod is subjected to surface aluminizing treatment to improve the surface hardness and corrosion resistance at high temperature. The high-temperature alloy core rod prepared through the preparation method has relatively high comprehensive mechanical property, long infatigue life and high in high-temperature strength, the service life of a die is obviously prolonged, the preparation process is simple, and the process is short.

The invention discloses magnesium-silicon-containing chromium-free zinc-aluminum coating anti-corrosive paint which comprises an A component and a B component at a mass ratio of 3:1, wherein the A component comprises the following raw materials: allumen powder, nano-silica, sodium lignosulphonate, benzotriazole, sulpho-diethylene glycol, triphenylphosphine and deionized water; the B component comprises the following raw materials: zirconium tetrafluoride, gamma-aminopropyl triethoxy silane, inositol hexaphosphate, cellulose acetate-butyrate, ethanol and deionized water; and the allumen powder comprises Zn, Al, Mg and Si. The paint has the characteristics of no toxicity, harmlessness, no pollution, low-temperature immediate processing, easiness in operation, extensive raw material sources, low price, cleaner production and the like.

The invention provides a high-temperature alloy for an electronic firework push rod and a preparation process and application of the high-temperature alloy. The high-temperature alloy comprises the following chemical components in percentage by mass: 23-25% of Cr, not more than 1.0% of Fe, 3.15-4.15% of Nb, 10.0-12.0% of Mo, 1.0-2.0% of Co, not more than 0.06% of C, not more than 0.5% of Mn, not more than 0.5% of Si, not more than 0.015% of S, not more than 0.015% of P, not more than 0.07% of Cu, not more than 0.4% of Al, not more than 0.4% of Ti and the balance of Ni. The high-temperature alloy for the electronic firework push rod solves the problems of poor high-temperature mechanical property and short service life of the high-temperature alloy in the prior art, has good thermal stability and mechanical property at room temperature and 1100 DEG C, and can be used for the electronic firework push rod.

The invention discloses a manganese containing anticorrosion paint with chromium-free zinc aluminium coating, and the A and B two-component are composed according to 3:1 mass ratio, wherein, A component comprises the following raw materials: zinc aluminium alloy powder, nanometer silica, sodium lignosulfonate, benzotriazol, sulfo diethylene glycol, triphenyl phosphine and deionized water; B component comprises the following raw materials: zirconium tetrafluoride, gamma-amino propyl triethoxysilane, inositol hexaphosphate, cellulose acetate butyrate, ethanol and deionized water. The zinc aluminium alloy powder is composed of Zn, Al, Ti and Mn. The product has the characteristics of nontoxicity, innocuity, no pollution, low temperature rapid treatment, simple operation, wide raw material source, low price, cleaning production, etc.

The invention discloses a bimetal combined piston ring, an internal combustion engine adopting same and a piston sealing method. Specifically, the bimetal combined piston ring comprises a metal firstpiston ring and a metal second piston ring; the cross section of a main body of the first piston ring is stepped; the stepped surface is positioned on the inner circumferential side of the first piston ring; the inner circumferential surface of the lower section of a step is a conical surface inclined inwards towards the vertical surface of the step by 15-75 DEG; the cross section of a main body of the second piston ring is stepped; the stepped surface is positioned on the outer circumferential side of the second piston ring; and the outer circumferential surface of an upper section of the step is an outer inclined conical surface complementary to the cone angle of the inner inclined conical surface of the first piston ring. By applying the piston ring, the dynamic property of the internalcombustion engine can be improved, and meanwhile, the wear rate of the piston ring is reduced, so that the service life of the ring is prolonged.