4results about How to "Excellent anti-scale explosion performance" patented technology

The invention discloses an ultra-low carbon hot-rolled steel plate with excellent enameling performance and a manufacturing method of the ultra-low carbon hot-rolled steel plate. The ultra-low carbon hot-rolled steel plate comprises the following chemical components in percentage by weight: 0.001-0.008% of C, less than or equal to 0.05% of Si, 0.1-1.0% of Mn, less than or equal to 0.035% of P, 0.015-0.050% of S, less than or equal to 0.010% of Al, less than or equal to 0.005% of N, 0.025-0.055% of O, 0.01-0.10% of Cu, 0.01-0.10% of Cr, less than or equal to 0.05% of Ni, less than or equal to 0.05% of Mo and the balance of iron and inevitable impurity elements. The yield strength of the steel plate is larger than or equal to 180 MPa, the tensile strength of the steel plate is larger than or equal to 280 MPa, the ductility of the steel plate is larger than or equal to 38%, the steel plate has excellent fish scaling resistance and adherence, pinholes, bubbles, black spots and other defects do not appear on the surface after electrostatic enamel process treatment, and good matching of the plasticity and enameling performance of the steel plate is achieved.

The invention discloses an ultra-low carbon hot-rolled steel plate with good formability and a manufacturing method thereof. The ultra-low carbon hot-rolled steel plate comprises the following chemical components in percentage by weight: 0.0005-0.004% of C, less than or equal to 0.05% of Si, 0.1-1.0% of Mn, less than or equal to 0.035% of P, 0.015-0.050% of S, less than or equal to 0.010% of Al, less than or equal to 0.005% of N, 0.025-0.055% of O, 0.02-0.10% of Nb, 0.01-0.10% of Cu, 0.01-0.10% of Cr, less than or equal to 0.05% of Ni, less than or equal to 0.05% of Mo and the balance of Fe and other inevitable impurities. The steel plate has good punch forming performance and aging resistance, the elongation rate of the steel plate is larger than or equal to 40%, the aging index (AI) of the steel plate is smaller than or equal to 45 MPa, the defects of fish scaling, bubbles, pinholes, black spots and the like generated during electrostatic enameling can be completely overcome, and the machining requirements for punching, flanging, cold rolling and the like during water heater inner container manufacturing, baking tray manufacturing and the like are met.

The invention discloses 300MPa-grade cold-rolled enamel steel and a preparation method thereof, and belongs to the technical field of cold-rolled strip production. The cold-rolled enamel steel comprises the following chemical components in percentage by mass: 0.01%-0.08% of C, less than or equal to 0.10% of Si, 0.10%-0.60% of Mn, less than or equal to 0.030% of P, 0.020%-0.040% of S, 0.010%-0.070% of Als, less than or equal to 0.0050% of N, 0.020%-0.060% of Ti and the balance of Fe and inevitable impurities. The adopted titanium-containing low-carbon steel is low in smelting cost, after a modern continuous annealing furnace is adopted for appropriate annealing process treatment, the cold-rolled enameled steel plate with the yield strength being 300 MPa or above and good fish scaling resistance is obtained, meanwhile, the original thickness specification is thinned by about 15%, and the production cost is greatly reduced. The problem that existing cold-rolled enamel steel cannot meet the requirements for excellent fish scaling resistance and thinning and cost reduction at the same time can be effectively solved.

The present application provides a kind of enamel enamel for thick hot-rolled steel plate and enamel and its preparation method.The chemical composition of the enamel enamel includes: SiO2 55%~58%, Al2O3 2.4%~3%, B2O3 11%~13%, CaO 1.5%~2.5%, SrO 0.5%~1.7%, CoO 1%~2%, NiO 0.5%~1%, Na2O 16%~19%, Li2O 1%~2%, K2O 1%~2% by weight content.The enamel enamel for thick hot-rolled steel plate provided by the present application can prepare 550MPa grade super-thick specification hot-rolled steel plate double-sided composite coating enamel with excellent performance, the coating has strong bonding force with steel plate, the adhesion strength is filamentous, resistant to citric acid A+ or above, the yield strength of enamel steel plate after enamel burning reaches 400~460MPa, and has very good anti-scaling performance.