Duplex stainless steel composite steel plate for sea water desalination and manufacturing method thereof

Abstract

The invention discloses a duplex stainless steel composite steel plate for sea water desalination and manufacturing method thereof, and a base material is carbon steel, and the base material comprisesthe following components of, in percentage by weight, less than or equal to 0.24% of C, less than or equal to 0.55% of Si, less than or equal to 1.6% of Mn, less than or equal to 0.035% of P, less than or equal to 0.035% of S, less than or equal to 0.3% of Cr, less than or equal to 0.3% of Ni, less than or equal to 0.3% of Cu and the balance Fe and inevitable impurity elements. A composite material is bidirectional stainless steel, and the composite material comprises the following components of, in percentage by weight, less than or equal to 0.03% of C, less than or equal to 2.0% of Mn, lessthan or equal to 1.0% of Si, less than or equal to 0.030% of P, less than or equal to 0.020% of S, 22%-23% of Cr, 4.5%-6.5% of Ni, 3%-3.5% of Mo, 0.14%-0.20% of N, 0.020%-0.030% of Nb and the balanceFe and inevitable impurity elements. The Nb is added into the composite material S32205, so that reduction of corrosion resistance, particularly intergranular corrosion, caused by reduction of chromium element concentration due to chromium carbide formed by combination of chromium and carbon in steel is prevented. The composite plate is good in composite effect, the shear strength of an interfaceis 350 MPa or above, and flaw detection can meet I-level requirements of the standard bonding rate of GB / T8165 (stainless steel composite steel plates and steel strips), namely 100% bonding.

Description

technical field [0001] The invention relates to a composite plate, in particular to a duplex stainless steel composite steel plate for seawater desalination and a manufacturing method thereof. Background technique [0002] With the development of modern industry and the emergence of various new technologies and materials, people have higher requirements for the performance of materials, and the performance of single component materials has been difficult to meet the requirements. An important direction of development in the field of engineering. The layered metal composite board is composed of two metal plates with different properties through special processing and preparation methods. Compared with a single metal component, the layered composite board after reasonable design and combination combines two metal components With their respective advantages, physical and chemical properties that a single metal does not have can be obtained. [0003] At present, stainless stee...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a duplex stainless steel clad steel plate for seawater desalination and its manufacturing method, which solves the problem that the strength and corrosion resistance cannot be matched. The corrosion resistance, shear strength and bonding strength all maintain a high level, fully meeting the requirements of steel for seawater desalination engineering composite panels

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