5results about How to "Eliminate brittleness" patented technology

The invention discloses a dissimilar material integrated manned lunar rover wheel hub and a forging-material adding-re-forging integral forming method thereof, and relates to manned lunar rover wheel hubs and forming methods thereof. The invention aims to solve the problem that the wheel-shaped component made of the dissimilar aluminum alloy material is difficult to integrally form. An integrated manned lunar rover wheel hub made of dissimilar materials is formed by connecting a rim and a spoke, the rim is composed of a rim body, an outer ring assembling ring and strip-shaped reinforcing ribs, and the spoke is composed of a plurality of Y-shaped sheet-shaped thin plates, an axle assembling flange and a transition area. The method comprises the steps of 1, blank making; 2, forging and forming a rim and a transition area; 3, finishing an additive interface; 4, adding materials; 5, homogenizing heat treatment; sixthly, integral forging forming is conducted; 7, aging strengthening treatment; and 8, machining and forming the wheel part. The method is used for the dissimilar material integrated manned lunar rover wheel hub and forging-material adding-re-forging integral forming of the dissimilar material integrated manned lunar rover wheel hub.

The invention relates to a wear-resistant and corrosion-resistant iron-nickel alloy material and a preparation method thereof, and belongs to the technical field of alloy material preparation, and the preparation method specifically comprises the following steps: firstly, using Mo, Si and Cr to reinforce an iron-nickel alloy matrix, mixing and smelting, and pouring into a cast ingot; then, the cast ingot is subjected to quenching, tempering and homogenizing heat treatment, and a primary blank is prepared; and then, the surface of the primary blank is roughened and pre-oxidized, the primary blank is coated with a nano TiN and WC enhanced NiCrBSi material, and finally the wear-resistant and corrosion-resistant iron-nickel alloy material is obtained. According to the prepared alloy, the hardness, the strength, the wear resistance and the corrosion resistance are remarkably improved, due to the solid solution and the compound formed by the reinforcing elements and the compact coating structure reinforced by the nano-particles, wear and corrosion are effectively resisted, and the service life is prolonged.

The invention provides steel for a nitriding pot as well as a production method and application of the steel. The steel comprises the following components: 0.0015%-0.0035% of C, 0.09%-0.20% of Mn, less than or equal to 0.012% of S, less than or equal to 0.015% of P, less than or equal to 0.030% of Si, 0.020%-0.040% of Al, less than or equal to 0.0030% of N, 0.035%-0.050% of Ti and the balance of Fe and other inevitable impurities. Compared with the prior art, by controlling the content of carbon, manganese, titanium and the like in the steel, it can be guaranteed that the steel has certain strength, the problem of embrittlement of the nitriding pot is solved when the nitriding pot is prepared, and meanwhile it can be guaranteed that the steel has certain strength and also has good formability. By controlling the temperature parameters of the cold rolling process and cooperating with the hot rolling coiling temperature, a metallographic structure with the grain size of 8-10 levels is obtained, the stamping performance of the steel is improved, and the corrosion resistance of the steel is improved to a certain extent.

The invention discloses a tellurium-copper alloy material and a preparation method and application thereof, and the tellurium-copper alloy material comprises the following components in percentage by mass: 0.4-0.7% of Te, 0.004-0.012% of P, 0.05-0.15% of Zr, 0.01-0.05% of Cd, 0.01-0.05% of Ge, less than or equal to 9 ppm of oxygen, and the balance of copper and inevitable impurities. Wherein the tellurium-copper alloy material contains intermetallic compounds Te2Zr, TeCd and GeTe, the particle diameter of the intermetallic compounds is 1-20 nm, and the number of the intermetallic compounds per 0.1 mm < 2 > area is more than 1000. Metal zirconium, cadmium and germanium are added into the tellurium-copper alloy and react with metal tellurium to generate an intermetallic compound, enrichment of tellurium particles at the grain boundary is reduced or eliminated, and meanwhile, in the casting process, stepped heating is adopted, extrusion parameters are controlled, and the tellurium-copper alloy material with excellent machining performance and the like is obtained. The method is simple, short in process and high in production efficiency, and has wide application prospects in the fields of electronic appliances and the like.