57results about How to "Reduce or eliminate defects" patented technology

The invention provides a flange for a wind power drum, and a manufacturing technique thereof. The flange comprises the chemical compositions in percentage by weight: 0.15-0.22 percent of C, 0.55-0.65 percent of Si, 0.65-0.75 percent of Mn, 5-8 percent of Ni, 4-6 percent of Cr, 0.65-0.85 percent of Nb, 0.25-0.45 percent of Cu, 0.05-0.07 percent of N, 0.05-0.07 percent of Mo, 0.7-0.9 percent of Al, 0.02-0.03 percent of S, 0.08-0.09 percent of Ti, 0.01-0.04 percent of V, 0.002-0.003 percent of B, 1-2 percent of rare earth lanthanide series and the balance of Fe. According to the invention, with the heating processing procedures of two-time normalization and two-time tempering, the excellent corrosion resistance of the flange is ensured, and meanwhile, high tensile strength and high yield strength are achieved; and the flange is ensured to have smaller surface roughness, more uniform and stable tissue, and less air holes and sand holes.

An organic electroluminescent device is provided having emitting layers with materials and thicknesses that provide constructive optical interference of emitted light. The device includes additional layers that provide contrast enhancement through destructive optical interference of ambient light entering the device.

The invention discloses a semiconductor treatment technology. The semiconductor treatment technology includes the step of providing a substrate and carrying out oxidation and oxidation layer removing treatment on the substrate at least once, wherein the oxidation and oxidation layer removing treatment includes the first step of carrying out oxidation treatment on the surface of the substrate and forming an oxidation layer on the surface of the substrate, and the second step of removing the oxidation layer and exposing the substrate. The invention further provides a semiconductor device preparation method through the semiconductor treatment technology so as to improve the performance of an embedded silicon germanium device. Through the oxidation and oxidation layer removing treatment, defects on the surface of the substrate can be reduced or eliminated, so the surface of the substrate is smooth and is beneficial for the next procedure.

The invention discloses a long-life steam turbine blade. The long-life steam turbine blade consists of the following chemical components in percentage by weight: 0.29-0.31% of C, 0.16-0.19% of Si, 0.75-0.77% of Mn, 0.73-0.85% of Ni, 9.5-10.1% of Cr, 0.55-0.64% of Mo, 0.15-0.17% of Sn, 0.11-0.15% of V, 0.82-0.84% of Sr, 0.15-0.17% of Nb, 0.02%-0.03% of Cu, 0.13%-0.15% of T, 0.06-0.08% of B, not greater than 0.01% of Ca, not greater than 0.03% of S, not greater than 0.03% of P, 0.16%-0.18% of rear-earth metal, and the balance of Fe. The production process disclosed by the invention is carried out by hot-forging, annealing, blade mechanical machining, distressing thermal treatment, tempering thermal treatment, cooling, surface-enhanced thermal treatment, physical and chemical inspecting, ultrasonic-wave flaw detecting, and cleaning-packaging. The production process disclosed by the invention can greatly improve impact toughness of the blade, can improve water erosion resistance and corrosion resistance of the blade, and can prolong the service life of the blade.

The invention discloses an amorphous Ga2O3 photoelectric detector and a preparation method and a performance improvement method thereof. The amorphous Ga2O3 photoelectric detector comprises a substrate, a hydrogen-doped amorphous Ga2O3 thin film active layer deposited on the surface of the substrate and an electrode arranged on the hydrogen-doped amorphous Ga2O3 thin film active layer, wherein thehydrogen-doped amorphous Ga2O3 thin film active layer is an amorphous thin film prepared by adopting a vacuum deposition method in a hydrogen-containing atmosphere at the temperature of 20-400 DEG C;the vacuum deposition method comprises any one of magnetron sputtering, pulse laser deposition, electron beam deposition and chemical vapor deposition.

The invention discloses a large-diameter flange and a preparation process thereof. The large-diameter flange comprises the following chemical components by weight percent: 0.45 to 0.65% of C, 0.25 to 0.30% of Si, 0.85 to 0.95% of Mn, 9 to 11% of Ni, 2 to 3 % of Cr, 0.15 to 0.20% of Nb, 0.85 to 0.95% of Cu, 0.02 to 0.04% of N, 0.13 to 0.15% of Mo, 0.2 to 0.3% of Al, 0.07 to 0.09% of S, 0.03 to 0.04% of Ti, 0.02 to 0.03% of V, 0.002 to 0.004% of B, 6 to 8% of lanthanide rare earth, and the balance of Fe. The processes of twice normalizing and twice tempering and the cooling thermal treatment process are adopted, the flange is guaranteed to have high tensile strength, high yield strength and smaller surface roughness, the structure is more stable and more uniform, and air holes and sand holes are little.

The invention discloses a production technique for suspension springs. The production technique for the suspension springs comprises the following steps of winding, specifically, winding of suspension spring main bodies is conducted according to the preset heights, outer diameters and turn numbers of the springs, one-time drawing formation of hook rings at the two ends and the suspension spring main bodies is conducted at the same time, and thus primary finished suspension springs are obtained; tempering stress relief, specifically, the primary finished suspension springs are placed in a tempering furnace for tempering stress relief; flaw detection, specifically, flaw detection is conducted on the primary finished suspension springs subject to tempering stress relief; surface treatment, specifically, primary sand blasting is conducted on the primary finished suspension springs subjected to flaw detection, and secondary sand blasting is conducted on the primary finished suspension springs subjected to primary sand blasting; sorting, specifically, machined finished suspension springs are conveyed one by one through spring conveying equipment, and stacking and sorting of the finished suspension springs are achieved; and packaging, specifically, the sorted suspension springs are placed in storage bags so as to be packaged. In this way, by adoption of the production technique for the suspension springs, the winding time of the suspension springs can be shortened, the stress relaxation resistance of the suspension springs is effectively improved, and the fatigue life of the springs is prolonged.

The invention relates to a high-pressure-resistant turbine blade. The chemical components of the high-pressure-resistant turbine blade include 0.019-0.021% of C, 0.09-0.11% of Si, 0.83-0.85% of Mn, 0.55-0.57% of Ni, 1.7-1.9% of Cr, 0.11-0.13% of Mo, 3.9-4.1% Co, 4.26-4.28% of V, 0.01-0.03% of Nb, 0.03-0.05% of Cu, 6.21-6.23% of Al, 0.007-0.009% of N, 0.23-0.25% of Ti, 0.08-0.10% of rare earth metal and the balance Fe. The invention further provides a production process for the high-pressure-resistant turbine blade. The impact toughness of the blade is greatly improved, the anti-water-erosion capacity and the corrosion resistance of the blade are improved, and the service life of the blade is prolonged.

The invention discloses a production technology of a big truck hub brake spring B, and belongs to the field of the production technology of the brake spring. The technical scheme of the production technology is characterized by comprising following steps: S1, a first process step: a middle tension spring semi-finished product is manufactured by a spring eight-claw machine through winding; and a second process step: the middle tension spring semi-finished product is subjected to destressing treatment; S2, the middle tension spring is subjected to shot blasting treatment; S3, a first process step: a left drag hook semi-finished product and a right drag hook semi-finished product are manufactured by the spring eight-claw machine through winding; and a second process step: the left drag hook semi-finished product and the right drag hook semi-finished product are subjected to destressing treatment; S4, stamping assembly is carried out by an oil press die; S5, the big truck brake hub springis placed in a tempering furnace and subjected to destressing treatment; S6, the big truck hub brake spring is subjected to length direction; S7, the big truck hub brake spring processed by S6 is subjected to alramenting treatment; and S8, the big truck hub brake spring is packaged and put in storage. The production technology has the advantage of improving comprehensive performance of the big truck hub brake spring B.

The invention is a steam turbine blade which can improve the impact toughness. The mass percentage of its chemical composition is: C: 0.13-0.15%, Si: 0.8-0.9%, Mn: 0.5-0.8%, Cr: 14-16%, Ni: 0.1-0.3%, Cu: 1.3-1.5%, Mo: 0.6-1.1%, W: 0.1-0.15%, V: 0.36-0.45%, Nb: 0.5-0.8%, Al: 0.28-0.30%, Ti : 0.16-0.18%, B: 0.08-0.10%, Na: 0.45-0.48%, S≤0.02%, P≤0.03%, rare earth metal: 0.3-0.6%, the balance is Fe; the invention also provides The production process of the steam turbine blade with high toughness, the invention can greatly improve the impact toughness of the blade and improve the service life of the blade.

The invention provides a turbine blade capable of enhancing water corrosion resistance, which comprises the following chemical components: 0.26-0.28% of C, 0.13-0.15% of Si, 0.75-0.77% of Mn, 0.63-0.65% of Ni, 10.5-10.7% of Cr, 0.65-0.67% of Mo, 0.16-0.18% of V, 0.82-0.84% of Sr, 0.15-0.17% of Nb, 0.05-0.07% of Cu, 0.24-0.26% of Al, 0.13-0.15% of Ti, 0.06-0.08% of B, at most 0.03% of S, at most 0.03% of P, 0.12-0.15% of rare-earth metal and the balance of Fe. The production technique can greatly enhance the impact toughness of the blade, enhance the water corrosion resistance and corrosion resistance of the blade and prolong the service life of the blade.