80results about How to "Improve galvanizing effect" patented technology

The invention belongs to the technical field of steel for high-strength automobiles and particularly relates to 1000 MPa low-carbon hot-galvanized dual-phase steel and a preparation method thereof. The 1000 MPa low-carbon hot-galvanized dual-phase steel comprises, by weight, 0.05-0.10% of C, 0.20-0.60% of Si, 1.40-1.90% of Mn, 0.20-0.70% of Cr, 0.20-0.50% of Mo, 0.02-0.06% of Al, 0.020-0.050% of Ti, 0.010-0.040% of Nb, 0.0010-0.0030% of B, less than or equal to 0.015% of P, less than or equal to 0.005% of S, less than or equal to 0.006% of N, and the balance Fe and inevitable impurities. The 1000 MPa low-carbon hot-galvanized dual-phase steel has the high forming property and high welding property and the excellent galvanizing property and mechanical property. The 1000 MPa low-carbon hot-galvanized dual-phase steel is 630-700 MPa in yield strength, 1010-1050 MPa in tensile strength and 11-14% in elongation.

The invention belongs to the technical field of hot-galvanizing high-strength steel for automobiles and particularly relates to 600MPa-level vanadium-containing hot-galvanizing dual-phase steel and a preparation method thereof. The dual-phase steel comprises the following components in percentage by weight: 0.04%-0.10% of C, 0.10%-0.60% of Si, 1.30%-1.90% of Mn, 0.10%-0.50% of Cr, 0.05%-0.25% of Mo, 0.01%-0.06% of Al, 0.01%-0.05% of V, less than or equal to 0.020% of P, less than or equal to 0.015% of S, less than or equal to 0.006% of N and the balance of Fe and inevitable impurities. According to the dual-phase steel, partial Cr and Mo are replaced with trace V and Si, so that the strength and hardenability of the dual-phase steel are improved, and meanwhile, the production cost is lowered; and by combining with a pre-oxidization reduction process, the surface galvanizing quality of the dual-phase steel is improved. The hot-galvanizing dual-phase steel prepared by virtue of the preparation method has excellent forming property, welding property and galvanizing property, oblivious cost advantage and remarkable economic and social benefits.

The invention relates to an improved hot galvanizing method of an iron handicraft or furniture. The method comprises the following steps: (1) uncoiling and degreasing a workpiece; (2) removing dust; (3) washing; (4) assisting plating; (5) baking; (6) galvanizing by dipping; (7) settling; (8) passivating; (9) cooling. In the method, a degreasant is changed into acidity and is composed of a sulfuric acid solution, OP-10 and di-o-tolyl-thiourea. Thus, a washing procedure can be saved; a water resource and the degreasant can be saved; the workpiece does not generate an over-cleaning phenomenon; a pickling solution is composed of a hydrochloric acid solution, phosphoric acid, alkylphenol ethoxylates, lauryl sodium sulfate and ethylenediamine tetraacetic acid, so that the pickling speed is improved, formation of acid mist and use of a complexing agent can be restricted, reduction of cadmia in galvanizing zinc is facilitated, the malleability of a zinc coating on the surface of the work-piece is improved, proper temperature and event are adopted in the subsequent galvanizing by dipping, and the thickness and the stability of the zinc coating at the surface of the workpiece are ensured. Thus, the improved hot galvanizing method is a method which is simple and convenient for operation and good in galvanized effect.

The invention relates to a preparation technique of a phase transformation induced plasticity hot galvanizing steel plate, which comprises the steps of: putting the steel plate at the temperature of 510-530 DEG C into a zinc pot, and then carrying out hot galvanizing in hot-dip galvanizing liquid at the temperature of 460-490 DEG C for 3-15 seconds, wherein the galvanizing liquid comprises the components by weight percent: 0.20-0.24% of Al, 0.01-0.10% of Ni, the balance of Zn and unavoidable trace impurities; the steel plate comprises the components by weight percent: 0.10-0.20% of C, less than or equal to 0.60% of Si, 0.50-1.00% of Al, 1.30-2.0% of Mn, 0.10-0.30% of Nb, and one or more element(s) selected from 1.0-2.0% of Cr, 0.01-0.05% of Mo, 0.01-1.0% of V, 0.005-0.1% of Ti, 0.01-0.10% of Ni and 0.003-0.01% of B; and the steel plate also comprises less than or equal to 0.015% of P, less than or equal to 0.015% of S, the balance of Fe and the unavoidable impurities. The preparation technique is easy to popularize and apply, and the prepared phase transformation induced plasticity hot galvanizing steel plate is good in phase transformation induced plasticity, galvanizing performance and adhesion property of a zinc layer.

The invention relates to an ultra-high-strength hot dip galvanizing complex-phase steel and a production method thereof, and belongs to the technical field of complex-phase steel metallurgy. The hot-dip zinc complex-phase steel comprises the chemical components of 0.09%-0.16% of C, 0.20%-0.50% of Si, 1.70%-2. 50% of Mn, equal to or less than 0.025% of P, equal to or less than 0.005% of S, 0.20%-0.60% of Mo, 0.02%-0.08% of Al, 0.010%-0.070% of Nb, 0.030%-0.070% of Ti, and equal to or less than 0.006% of N. The preparation method comprises steps of smelting, hot rolling, acid pickling and hot dip galvanizing annealing process, wherein a pre-oxidation reduction process is adopted in the hot dip galvanizing annealing. The forming performance, welding performance and galvanizing performance ofthe prepared hot dip galvanizing complex-phase steel are good, which reaches the requirements of high strength and high elongation.

The invention relates to the field of galvanizing, and particularly relates to a galvanized steel wire galvanizing device. The galvanized steel wire galvanizing device comprises a galvanizing tank, wherein a pair of guide rollers is mounted on the galvanizing tank, a galvanizing solution tank is dug in the galvanizing tank, a pair of limiting rollers are rotatably connected in the galvanizing solution tank, and steel wires are connected between the guide rollers and the limiting rollers; and an automatic heat preservation scraping mechanism is arranged in the galvanizing solution tank, arranged on the upper sides of the limiting rollers and comprises a cover plate. According to the galvanized steel wire galvanizing device, by arranging the corresponding mechanisms on the galvanizing tank,the solidification speed of a surface layer galvanizing solution is greatly decreased, an operator does not need to frequently conduct scraping work, meanwhile, the hands of the operator are liberated, the operator does not need to manually scrape the galvanizing solution solidified on the inner surface layer of the galvanizing tank, the whole device can be automatically removed, the safety of theoperator is greatly improved, meanwhile, the scraping efficiency is improved, the steel wire galvanizing effect is greatly improved, and the situation that the steel wires are affected by the solidified galvanizing solution is avoided.

The invention discloses economical high-aluminum and low-silicon TRIP high-strength steel for automobiles and a preparation method of the TRIP steel, and belongs to the technical field of production of high-strength steel for automobiles. The TRIP steel comprises the components of, by mass, 0.15-0.25% of C, 0.1-0.5% of Si, 1.5-3.0% of Al, 1.5-2.5% of Mn, 0.1-1.0% of Cu, 0.01% of P and Lt, 0.005% of S and Lt and the balance Fe. The preparation method comprises the following steps of smelting, pouring, forging, heat preservation, hot rolling, thatching, acid pickling, cold rolling and annealingtreatment. Micro-alloy elements contained in the steel are less, so that the steel is economical and beneficial for being recovered; Si is partially replaced by Al, the ductility is improved, and thegalvanization performance of a cold rolled steel plate is improved; a small quantity of Cu is added, the defect of Al at the aspect of strength is made up through solid solution and precipitation strengthening, and the extension strength is improved. By adopting annealing in a two-phase area and heat preservation in a bainite area in the heat treatment technology, a cold rolled plate with the extension strength being larger than 780 MPa, the ductility being over 25%, the maximum ductility reaching 30% and the plate shape and the surface quality being good is obtained. The temperature of the bainite area is higher than 460 DEG C so as to be matched with the galvanization technology to achieve integration of annealing and galvanization, and thus the high-strength galvanized plate for the automobiles is produced.

The invention discloses a novel antitheft fence. Three sets of transverse rods are arranged. Each set of transverse rods include a first transverse rod unit and a second transverse rod unit. The transverse rods are hollow square hot galvanizing steel pipes. The front side face and the rear side face of each first transverse rod unit are provided with a plurality of parallel and opposite first fixing holes. The front side face and the rear side face of each second transverse rod unit are provided with a plurality of parallel and opposite second fixing holes. Positioning holes are formed in the rear side faces of the second transverse rod units. Vertical rods are hollow square hot galvanizing steel pipes. Bolts are arranged between the first transverse rod units and the vertical rods. Nut sleeves are arranged between the second transverse rod units and the vertical rods. Each nut sleeve comprises a nut head and a sleeve, wherein tip protrusions are arranged at the two ends close to the nut head respectively. Ends of the bolts are installed in the sleeves through screw-thread fit. The tip protrusions are matched with the positioning holes. Elastic gaskets are arranged between the bolts and the first transverse rod units. The fence has the advantages of being high in corrosion resistance and long in service life, and the problem that a fence is stolen can be well solved.