A kind of hot-dip galvanized steel sheet with a tensile strength of 600mpa and its manufacturing method
A technology of tensile strength and manufacturing method, applied in the field of iron-based alloys, can solve the problems of low production efficiency and high manufacturing cost, and achieve high production efficiency, improved manufacturing reliability, high elongation and yield ratio. Effect
Active Publication Date: 2021-04-06
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology
[0008] The purpose of the present invention is to provide a hot-dip galvalume steel sheet with a tensile strength of 600MPa and its manufacturing method, which mainly solves the technical problems of high manufacturing cost and low production efficiency of a hot-dip galvanized steel sheet with a tensile strength of 600MPa in the prior art , to meet the needs of building structural parts for forming and processing high-strength hot-dip galvanized steel sheets
Method used
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Embodiment 4
[0058] Example 4 The yield strength of the hot-dip galvanized steel sheet is 389MPa, the tensile strength is 622MPa, and the elongation after fracture is A 80mm It is 22.2%, which shows that through low-cost composition design, combined with rapid heating annealing and cooling process technology, the economical dual-phase high strength, high elongation and low yield ratio galvanized sheet manufacturing is realized.
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Abstract
The invention discloses a hot-dip galvalume steel sheet with a tensile strength of 600MPa and a manufacturing method thereof, which mainly solves the technical problems of high manufacturing cost and low production efficiency of the hot-dip galvanized steel sheet with a tensile strength of 600MPa in the prior art. A hot-dip galvanized steel sheet with a tensile strength of 600MPa provided by the present invention has the following chemical composition weight percentages of the substrate: C: 0.12%-0.15%, Si: 0.1-0.2%, Mn: 1.0%-1.2%, Ti : 0.025 to 0.035%, P: 0 to 0.015%, S: 0 to 0.015%, B: 0.0020 to 0.0040%, and the rest is Fe and unavoidable inclusions. The metallographic structure of the hot-dip galvanized steel sheet of the present invention is ferrite, and the volume percentage content is 3 to 5% of martensite, cementite and fine titanium carbonitride precipitates. The hot-dip galvanized steel sheet of the present invention is mainly For building steel structure components.
Description
technical field [0001] The invention relates to a cold-rolled hot-dip aluminum-zinc steel sheet, in particular to a hot-dip aluminum-zinc steel sheet with a tensile strength of 600 MPa and a manufacturing method thereof, belonging to the technical field of iron-based alloys. Background technique [0002] Since the hot-dip galvanized steel sheet was developed in 1964, it has a wide range of industrial applications due to its excellent characteristics. Due to the protective function of aluminum in the coating, the hot-dip galvanized steel sheet has good corrosion resistance, so it is used in construction , Automobiles and home appliances and other fields are widely used. [0003] In recent years, with the increasing demand of the domestic construction steel market, the mechanical performance requirements of high-strength hot-dip galvanized products have been significantly improved, so as to meet the requirements of material thinning through high strength, and at the same time ...
Claims
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IPC IPC(8): C22C38/02C22C38/04C22C38/14C21D8/02C23C2/06C23C2/40
CPCC21D8/0226C21D8/0236C21D8/0273C21D2211/003C21D2211/004C21D2211/005C21D2211/008C22C38/02C22C38/04C22C38/14C22C38/32C23C2/06C23C2/40
Inventor 丁志龙穆海玲魏宝民闫秉昊
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD