6results about How to "Improve deep drawing performance" patented technology

This application relates to the field of metallic materials technology, disclosing a highly formable aluminum alloy material, an aluminum alloy sheet, and a method for preparing the same. The aluminum alloy sheet, by mass percentage, comprises: Fe 0.8%~1.2%, Mn 0.4%~0.8%, Zr 0.1%~0.3%, Si 0%~0.05%, Cr 0.1%~0.3%, with the remainder being Al and other unavoidable impurity elements. The total content of Fe and Mn ranges from 1.45% to 1.6%. The method for preparing the aluminum alloy sheet includes: preparing an aluminum alloy melt; continuously casting the aluminum alloy melt to obtain a billet; continuously rolling the billet to obtain a hot-rolled sheet; and performing a first cold rolling on the hot-rolled sheet to obtain the aluminum alloy sheet. This application can improve the strength, plasticity, and deep-drawing performance of the aluminum alloy material, achieve high formability, simplify the process flow, improve efficiency, and reduce energy consumption.

The invention discloses a production method of a cold-rolled steel strip for a welding wire. The production method comprises the working procedures of converter smelting, continuous casting, hot rolling, cold rolling, continuous annealing and flattening. Refining treatment is not carried out; continuous annealing is adopted in the annealing process, and a heating device is arranged behind the rapid cooling section. According to the cold-rolled steel strip produced through the method, the yield strength Rp0.2 is smaller than or equal to 190 MPa, the tensile strength Rm is 280-350 MPa, the percentage elongation after fracture A80 mm is larger than or equal to 44%, the cold-rolled steel strip has good formability, welding performance and drawing machining performance, the surface quality is good after drawing, surface defects such as orange peel and wrinkling do not exist, and meanwhile the production cost is low.

This application relates to a clean steel and its preparation method. The clean steel composition includes: C: ≤0.0030%; N ≤0.0020%. Such a pure composition meets the requirements of steel used in high-end fields. The method obtains clean steel through electric furnace smelting of all scrap steel or high scrap ratio steel, ladle refining process, continuous casting, heating, and rolling. It effectively controls the nitrogen and oxygen content in the molten steel, ensuring the high purity of the steel. In particular, at the end of the decarburization treatment of the RH vacuum circulation degassing refining process, a certain amount of methane is mixed into the bottom blowing gas. The methane reacts with the oxygen in the molten steel to generate a large number of CO bubbles, which enhances the stirring of the molten steel, promotes the flotation of inclusions, and improves the cleanliness of the molten steel. At the same time, the CO bubble effect improves the denitrification efficiency of the molten steel. Furthermore, since the methane gas consumes some of the oxygen in the molten steel, the oxygen content of the molten steel is reduced at the end of the decarburization treatment, thereby reducing the amount of aluminum alloy used for deoxidation and further improving the cleanliness of the molten steel.

The application provides a method for preparing a ferrite-rolled ultra-low-carbon bake-hardening steel in an ultra-short process and a steel strip, and belongs to the technical field of metallurgy. The method completely omits the cold rolling and continuous annealing process, and comprises the following steps: heating a slab with a predetermined chemical composition; rough rolling the slab in an austenite zone to obtain an intermediate slab; finish rolling the intermediate slab in a ferrite zone, wherein the cumulative equivalent strain of the finish rolling is greater than or equal to 2.3, and a steel strip is obtained; coiling the steel strip, wherein the coiling temperature is 680-720 DEG C, and the coiling is kept for 30-60 min, and then the steel strip is cooled to room temperature to obtain a target steel strip. The method for preparing a ferrite-rolled ultra-low-carbon bake-hardening steel in an ultra-short process can directly obtain an ULCBH steel with high deep-drawing performance and high bake-hardening performance in a hot-rolled state.

The invention belongs to the technical field of aluminum-based materials, and particularly relates to a high-strength and high-elongation 1100D aluminum foil and a preparation method thereof. Through composite addition of multiple elements such as RE and Zr and fine process control, the material strength is remarkably improved while good plasticity and machinability of the aluminum foil are guaranteed, the prepared aluminum foil overcomes the problem that the strength of a traditional 1100 series alloy is low or the ductility is sharply reduced after the strength is improved, and the comprehensive mechanical property of the aluminum foil is superior to that of a conventional product.

The invention provides a cover annealing furnace production method of an SPCC cold-rolled steel plate with a plastic strain ratio r90 value greater than or equal to 2.3, which comprises the following steps: controlling the chemical components of molten steel in percentage by weight: 0.03-0.05% of C, less than or equal to 0.06% of Si, 0.12-0.22% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S and 0.020-0.040% of Alt, and annealing a cold hard coil in a cover annealing furnace; firstly heating to 350 DEG C at a full speed, then heating from 350 DEG C to 710 DEG C at a controlled slow speed, and controlling the heating time at the section to be 500 minutes; and preserving heat according to the thickness of the steel plate after the temperature reaches 710 DEG C, and then cooling and discharging according to a conventional process. The deep drawing forming performance of the product is greatly improved.