Stainless steel material for doors and windows

Abstract

The invention provides a stainless steel material for doors and windows. The material is prepared from a Fe element and modified chemical element impurities. The following modified chemical elements in percentage by mass are included: 0.05 to 0.11 percent of C, 0.5 to 1 percent of Mn, 0.21 to 0.24 percent of Si, 0.006 to 0.008 percent of P, 0.002 to 0.004 percent of S, 0.093 to 0.095 percent of Nb, 0.06 to 0.08 percent of V, 2.8 to 3.1 percent of Ti, 1.5 to 1.7 percent of Al, 0.001 to 0.006 percent of N, 0.0001 to 0.0002 percent of H, 0.05 to 0.07 percent of Cu, 7.4 to 15.2 percent of Cr, 8.1 to 11.3 percent of Ni, 0.23 to 0.25 percent of Mo, 0.21 to 0.23 percent of La, 0.04 to 0.08 percent of Sr, 0.05 to 0.1 percent of Th, 0.02 to 0.03 percent of Be, 0.05 to 0.08 percent of Zr, 0.0015 to 0.002 percent of B, and 0.06 to 0.09 percent of Re. According to the stainless steel material for doors and windows provided by the invention, the element contents in stainless steel are reasonably controlled, so that the obtained stainless steel is anti-corrosion and anti-erosion; and the rare earth element lanthanum is added, so that the high-strength anti-corrosion stainless steel for metal doors and windows are successfully obtained and has better transverse yield strength and high-ductility, the transverse tensile strength is larger than or equal to 450MPa, the transverse yield strength is larger than or equal to 240MPa, the transverse extension rate is larger than or equal to 30 percent, and the thickness-direction area reduction percentage is larger than or equal to 55 percent.

Description

technical field [0001] The invention relates to the technical field of door and window materials, in particular to a stainless steel material for doors and windows. Background technique [0002] In the prior art, the materials used to prepare doors and windows mainly include aluminum alloys, glass fiber composite materials, etc., but aluminum alloy door and window profiles are not corrosion-resistant, and their heat transfer coefficient is high, which makes them poor in five-year warranty performance and average in energy-saving effects. And it's heavy. Although the heat transfer coefficient of glass fiber composite doors and windows is lower, the corrosion resistance and aging resistance of glass fiber composite door and window profiles are poor. Improper use of materials will lead to structural design problems, such as: complex structure, high cost, easy damage and wear between parts, and during the installation process, additional installation tools are required for asse...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the materials used to prepare doors and windows mainly include aluminum alloys, glass fiber composite materials, etc., but aluminum alloy door and window profiles are not corrosion-resistant, and their heat transfer coefficient is high, which makes them poor in five-year warranty performance and average in energy-saving effects. and heavy

Although the heat transfer coefficient of glass fiber composite doors and windows is lower, the corrosion resistance and aging resistance of glass fiber composite door and window profiles are poor.

Improper use of materials will lead to structural design problems, such as: complex structure, high cost, easy damage and wear between parts, and during the installation process, additional installation tools are required for assembly, the assembly process is cumbersome and stable Poor performance and other issues

There are also doors and windows made of stainless steel, but stainless steel has poor corrosion resistance and is extremely sensitive to erosion, and its material is also extremely sensitive to stress corrosion. These shortcomings restrict the development of stainless steel in the field of doors and windows