Baoshan Iron & Steel Co., Ltd.

Yuling Ren

Jun Li

Jianping Zhang

Xin Liu

Yuan Ma

Yigang Dai

Dechao Xu

Lan Zhu

Hongming Chen

Zhilong Ding

Xuewei Ye

Hengfa Hu

An aluminium-zinc-hot-dipped and colour-coated steel plate having yield strength of &#x2265;500 MPa and a high elongation and a manufacturing method thereof, with the chemical components in mass percentage of a substrate of the steel plate being: 0.07-0.15% of C, 0.02-0.5% of Si, 1.3-1.8% of Mn, N&#x2264;0.004%, S&#x2264;0.01%, Ti&#x2264;0.15%, Nb&#x2264;0.050%, and the balance being Fe and other inevitable impurities, and meanwhile satisfying the conditions of: (C+Mn/6)&#x2265;0.3%; Mn/S&#x2265;150; Nb satisfying 0.01%&#x2264;(Nb-0.22C-1.1N)&#x2264;0.05% where no Ti is contained; Ti satisfying 0.5&#x2264;Ti/C&#x2264;1.5 where no Nb is contained; and 0.04%&#x2264;(Ti+Nb)&#x2264;0.2% where Ti and Nb are added in combination. The steel plate has a tensile strength of &#x2265;550 MPa, an elongation after fracture of &#x2265;15%, a good strength and toughness and an excellent corrosion resistance.

500 MPA yield strength-graded, high-stretchability hot-dip aluminum-zinc and color-coated steel plate and manufacturing method therefore

Disclosed is an aluminium-zinc hot-plated steel plate having excellent weather resistance, corrosion resistance and alkali resistance, and an environmental-friendly surface treating agent therefor, wherein after the surface treatment of the aluminium-zinc hot-plated steel plate using an environmental-friendly surface treating agent consisting of the components of a matrix resin compounded from a particular solvent-free aqueous aliphatic polyurethane dispersion and aqueous polyurethane-acrylic acid copolymer, an organic silicon compound, a matrix resin curing agent, a water-soluble metal salt compound and a high-density polyethylene lubrication auxiliary etc., the formed surface-treated aluminium-zinc hot-plated steel plate has comprehensive properties of excellent weather resistance, corrosion resistance and alkali resistance, and good machine formability etc.

Aluminium-zinc hot-plated steel plate having excellent weather resistance, corrosion resistance and alkali resistance, and manufacturing method and surface treating agent therefor

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Shanghai, China

Yuling Ren