35results about How to "Content adjustment" patented technology

The invention discloses an Al-Si-Cu-Mg series distortion aluminum alloy and the manufacturing method. The alloy is made up from 9.0-12.0wt% Si, 3.0-4.0wt% Cu, 0.3-0.6wt% Mg, <0.30% Fe, <0.20% Zn, and other impurity <=0.15wt%, and the rest is Al. The method includes the following steps: smelting and refining the raw materials in reflecting smelter, after processing the allow liquation by Al-Sr intermediate alloy, gaining cast rod through hemicontinuous casting, extruding the cast rod and after forging and T6 thermal treatment to gain the product. The tensile strength of the alloy is over 397MPa, and broken tensile stretch is 6%, and rigidity is 136-141HB. It is mainly used to make wheel for vehicle and motorcycle, piston, bearing, bidirectional sloping cam plate, etc.

The invention discloses a microwave sintering manufacturing process of a high-density polycrystalline diamond wire drawing die. A microwave sintering method is used to form an insert. The sleeve, the polycrystalline diamond core and the steel sleeve are microwave sintered to form a polycrystalline diamond wire drawing die; the sintering atmosphere is N2+H2, the initial input power is 300-320W, and the temperature rises to 380-400°C, and the input power is adjusted to 380 ‑400W, the temperature rises to 450‑480°C and the input power is adjusted to 300‑320W, the temperature rises to 520‑540°C and keeps warm at this temperature. Using microwave sintering, the grains lack the growth time to obtain fine grain structure, so as to obtain more excellent performance; at the same time, in the sintering process, set a reasonable initial input power, so that the incubation period of the material during the sintering process is reasonable, At the same time, the input power is adjusted according to the temperature change.

The invention belongs to the field of alloy steel smelting of iron and steel industries, and particularly provides an extra large high strength steel for a fastening part and a production method. The steel for the fastening part comprises, by mass, 0.43-0.47% of C, no more than 0.10% of Si, 0.60-0.90% of Mn, no more than 0.020% of P, no more than 0.010% of S, 0.02-0.06% of Als, 0.90-1.20% of Cr, 0.30-0.60% of Mo, 0.20-0.50% of V, 0.02-0.06% of Nb, 0.001-0.003% of B, and the balance Fe and unavoidable impurities. The production method of the steel comprises the following steps of molten iron desulfurization, converter smelting, deoxidation alloying, argon blowing, LF furnace treatment, continuous casting, casting blank heating, high line or bar rolling and stelmor control cooling. Steel inclusion produced through the method is low in grade, the extra large high strength steel is uniform in texture, good in cold heading property and hardenability and good in delayed fracture resistance, the tensile strength of wire rods reaches above 850 MPa, the depth of hardening layers of produced products reaches above 10 mm, the problem that the diameter of the large-scale fastening part needs to be increased to meet the tolerance requirements is solved to a certain extent, and the method is suitable for manufacturing the large-scale high strength fastening part.

The invention relates to a roll sleeve steel for aluminum casting and rolling mills and a heat treatment method thereof. A roll sleeve steel for aluminum casting and rolling mills, the chemical composition weight percent (%) is: carbon (C) 0.30-0.45, manganese (Mn) 0.60-0.80, silicon (Si) 0.20-0.40, phosphorus (P) ≤ 0.025 , sulfur (S) ≤ 0.025, chromium (Cr) 2.00 ~ 3.00, nickel (Ni) 0.50 ~ 1.00, molybdenum (Mo) 0.80 ~ 1.20, vanadium (V) 0.10 ~ 0.20, aluminum (Al) ≤ 0.012, the rest is iron and other impurities. The final heat treatment method of the roller sleeve steel is secondary tempering after quenching, the quenching heating temperature is 850-920°C, and quenching in engine oil after heat preservation; the first tempering roller sleeve is heated to 500-560°C, and the heat preservation is 10-20 hours. Cool in oil; the second tempering parameters are the same as the first tempering parameters. The invention improves the ability of the roller sleeve to resist thermal fatigue cracks, thereby increasing the service life of the roller sleeve, reducing production failures and reducing production costs.

The invention discloses a hot pressing and sintering manufacturing process of a polycrystalline diamond wire drawing die. The metal powder used includes, by mass percentage: 34-37wt% iron powder, 20-25wt% nickel powder, and 15-19wt% copper powder , 8‑10wt% aluminum powder, 8‑10wt% zinc powder, 1‑2wt% tin powder, 1‑2wt% magnesium powder, 2‑3wt% silver powder, 1‑2wt% phosphorus powder, 2‑ 3wt% zinc-30wt% aluminum master alloy powder. The invention improves the comprehensive performance of the wire drawing die set, so that its compressive strength, hardness, bending strength, impact toughness and wear resistance are all significantly improved. When the die is produced, it can effectively reduce the embrittlement of the die core in the sintering process, Improve the utilization rate of the mold core; during the use of the mold, it can reduce the wear of the mold by hard wire drawing, prolong the service life of the mold, improve the quality of silk products, and reduce the production cost of the enterprise.

The invention discloses the application of a chiral polymer catalyst in an asymmetric reaction, and belongs to the field of material synthesis and application. The phosphine-containing polymer consists of vinyl-containing chiral bidentate phosphine ligand BINAP (2,2'-bis(diphenylphosphino)-1,1'-binaphthyl) and its derivatives and other vinyl groups It is formed by mixing comonomers. This type of vinyl polymer material has a high specific surface area and a large porosity, and at the same time has excellent thermal stability and chemical stability. One or more of metals Ru, Rh, Ir, Pa, Au and Cu are used as active components in the heterogeneous catalyst. Because the chiral ligands are uniformly embedded and highly dispersed in the polymer skeleton, the dispersion of the metal on the catalyst is higher, and higher catalytic activity is achieved. The heterogeneous catalyst is suitable for various reaction processes such as intermittent tank reaction, continuous fixed bed reaction and trickle bed reaction. When it is applied to catalytic tank type asymmetric hydrogenation reaction, high yield of target product and enantioselectivity greater than 96% can be obtained.

The invention discloses a hot-work die steel. The hot-work die steel consists of the following components in percentage by weight: 0.30 to 0.50 percent of C, 0.80 to 1.20 percent of Si, 1.50 to 1.70 percent of Mn, 4.50 to 5.50 percent of Cr, 1.60 to 2.00 percent of W, 0.10 to 0.30 percent of Mo, 1.60 to 1.80 percent of V, 1.20 to 1.60 percent of Ni, 0.2 to 0.4 percent of Co, 0.5 to 0.7 percent of Nb, less than or equal to 0.05 percent of S, less than or equal to 0.03 percent of P and the balance of Fe.

The invention relates to an aluminum-copper-magnesium alloy wire rod and a manufacturing technique of the aluminum-copper-magnesium alloy wire rod. The aluminum-copper-magnesium alloy wire rod is formed by the following raw materials in percentage by weight: 0.2-2.5% of copper, 0.2-2.8% of magnesium, 0.1-0.6% of silicon, 0.2-0.7% of iron, 0.03-0.5% of boron, 0.03% of manganese, 0.03% of zinc, 0.03% of chrome, 0.01% of titanium, and 96%-98% of aluminum. The manufacturing technique comprises the following steps: (1), smelting of aluminum alloy, (2), online treatment of aluminum alloy, (3), casting of aluminum alloy, (4), rolling of aluminum alloy wire rod, and (5), carrying out online aging treatment on the rolled aluminum alloy wire rod to obtain the wire rod, wherein the drawing out temperature is not higher than 60 DEG C. The aluminum-copper-magnesium alloy wire rod meets the performance requirements on the raw material aluminum alloy wire rod in copper clad aluminum alloy in the cable industry field, in particular the requirements on the performances in the aspects of tensile strength, percentage elongation and compressive creep, and the like.