9 results about "Base metal" patented technology

A welder for welding a base metal. The welder may include a first electrode for forming a first arc with the base metal and a second electrode for forming a second arc between the first and second electrodes. A compact welder, welding system, and method are also provided.

The invention provides a welding wire material for austenitic stainless steel. The welding wire material comprises the following chemical ingredients in percentage by weight: 0.011 to 0.078 percent of C, 0.15 to 0.32 percent of Si, 1.57 to 2.39 percent of Mn, less than or equal to 0.023 percent of P, less than or equal to 0.013 percent of S, 25.59 to 25.82 percent of Cr, 8.17 to 8.87 percent of Ni, less than or equal to 0.43 percent of Mo, less than or equal to 0.058 percent of N, 0.09 to 0.39 percent of Cu, 0.03 to 0.042 percent of rare-earth element Re and the balance of Fe and inevitable impurities. Aiming at the austenitic stainless steel containing the rare-earth element and the austenitic stainless steel and ordinary steel, the invention provides the welding wire material for the austenitic stainless steel, which is scientific in design, convenient to use and high in deposition rate, the sensitivity of metal cold cracks at weld joints after welding is low, and the performance of metal at the weld joints is close to that of base metal.

A chemical looping combustion (CLC) process for sour gas combustion includes a number of reaction zones and is configured to provide in-situ oxygen production and in-situ removal of S02 from a product gas stream by reacting the SO2 with a calcium-based sorbent at a location within one reaction zone. The CLC process is also configured such that the in-situ oxygen production results from the use of a metal oxide oxygen carrier which is purposely located such that it does not directly contact the sour gas, thereby eliminating the generation of undesirable sulfur-based metal oxides.

A method for concentrating platinum and palladium from platinum-palladium flotation concentrates is composed of the following steps of adding sulfur of which the mass accounts for 0.2%-10% of the platinum-palladium flotation concentrates according to the mass ratio (1:3-9) of the platinum-palladium flotation concentrate to sulfuric acid solutions with the concentration of 150-250 g/L; leaching for1-5h under the oxygen partial pressure of 0.5-1.0 MPa, at the leaching temperature of 120-160 DEG C, pH of less than 0.5, and the stirring speed of 400-600 r/min; after leaching, maintaining the original stirring speed, cooling to 108-114 DEG C at the rate of 0.2-0.5 DEG C/min, and holding for 1-3h; continuously cooling to room temperature at the rate of 0.4-1.0 DEG C/min and the stirring speed of 150-300 r/min; and filtering to obtain leachate and leaching residues, and screening the leaching residues with a 100-mesh screen to obtain platinum-palladium concentrates and tailings. The method is simple in operation, and the purposes of concentrating precious metal including platinum and palladium as well as three-phase separation of base metal including copper, nickel, zinc, iron and silicate tailings are achieved synchronously; and the content and enrichment ratio of the precious metal in the platinum-palladium concentrates are high, and the subsequent separation cost is reduced obviously.

Provided is a method for manufacturing wire wherein a cylindrical outer layer body constituted of a magnetic metal containing iron and a core body having an outside diameter with a ratio to the insidediameter of the outer layer body of 85.1-99.4% are prepared, the inside surface of the outer layer body and the outside surface of the core body are mechanically polished, at least one of the insidesurface of the outer layer body and the outside surface of the core body is treated with hydrochloric acid, a base metal is obtained by disposing the core body inside the outer layer body, and the base metal is passed through a wire drawing die, thereby obtaining a wire having a core conductor that is formed by the core body and an outer layer that is formed by the outer layer body and covers thecore conductor.

The invention discloses an alkali-resistant anticorrosive paint. The paint consists of two components A and B, wherein the component A consists of the following raw materials in parts by weight: 67-74 parts of epoxy resin E44, 20-25 parts of high chlorinated polyethylene resin, 10-16 parts of mica powder, 4-6 parts of titanium dioxide, 5-7 parts of sodium carboxy methyl cellulose, 4-6 parts dimethyl terephthalate, 4-6 parts of glycerol, 2-4 parts of ethyl acrylate, 2-3 parts of tung oil, 2-3 parts of polyacrylamide, 2-3 parts of diethylamine, 2-3 parts of triethyl O-acetylcitrate, 3-4 parts of ammonium dihydrogen phosphate, 4-5 parts of sodium molybdate, 2-4 parts of 2, 6-butylated hydroxytoluene, 9-12 parts of a compound modifying agent, 25-30 parts of dimethyl benzene, 8-10 parts of n-butyl alcohol, 0.8-1 part of anilino-methyl-triethoxysilane and 0.5-1 part of dimethicone. The produced paint has the advantages of good adhesion with metal, small structural pores, compact structure, excellent adhesion, good flexibility, high shock strength, strong corrosion resistance and efficient base metal protection function.

The invention discloses an intermediate layer alloy applied to resistance spot-welding of tantalum Ta1 and Q235 and a preparation method thereof. The intermediate layer alloy is prepared from the components in percentage by atom: 5%-10% of Ta, 5%-10% of Fe, 20%-25% of Ni, 15%-23% of Cr, 15%-22% of Cu, 20%-25% of Co, and the total atom percentage of the components is 100%. A certain thickness of intermediate layer alloy foil is placed between Ta1 and Q235 sheets to be welded, resistance spot-welding is used for welding operation to enable the intermediate layer alloy and partial base metal aresubjected to heat fusing by interface resistance, and the high performance welding of Ta1/Q235 is realized. According to the method and the intermediate layer alloy thereof, the matching between tantalum and stainless steel during welding is good, a single phase Fcc solid solution structure is used as nugget, joint comprehensive mechanical properties are remarkably improved, and the preparation method of the intermediate layer alloy foil is simple in process and low in cost.

The invention relates to the field of hardware tools, in particular to a separating preventing hard alloy maintenance tool. The separating preventing hard alloy maintenance tool comprises a communicating rod, a base metal main body, an inclined surface, penetration mounting holes and alloy components; the lower part of the communicating rod is connected with the base metal main body; the inclined surface is arranged at the edge of the upper part of the base metal main body; the penetration mounting holes are formed in the inclined surface; the alloy components are embedded into the penetration mounting holes; each alloy component comprises a hollow sleeve, a super-hard core body and a connecting shaft assembly; each super-hard core body is arranged in the corresponding hollow sleeve in a sleeving manner and is fixedly connected with the corresponding connecting shaft assembly. According to the separating preventing hard alloy maintenance tool, through the arrangement of the penetration mounting holes and the hollow sleeves, the super-hard core bodies can be subjected to dual protection, and the problem of separating of the super-hard core bodies caused by the difference of thermal expansion coefficients is prevented; through the arrangement of the inclined surface, direct impact pressure in a furnace is favourably transferred to one side so as to reduce a pressure coefficient.