A kind of low-alloy high-strength high-weathering structural steel for highway guardrail and preparation method thereof
A technology for highway guardrails and structural steel, which is applied in the direction of manufacturing tools, temperature control, heat treatment equipment, etc., can solve the problems of no high weather-resistant structural steel, etc., achieve the effects of improving weather resistance, improving weather resistance and mechanical properties, and reducing environmental pollution
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Embodiment 1
[0038] In Example 1, the weight loss rate of low-alloy, high-strength and high-weathering structural steel is 1.687g / (m 2 h), the atmospheric corrosion resistance index I is 8.402, and the ferrite grain size grade is 10.5.
Embodiment 2
[0039] In Example 2, the 75-hour cycle immersion weight loss rate of low-alloy high-strength and high-weathering structural steel was 1.985g / (m 2 h), the atmospheric corrosion resistance index I is 8.145, and the ferrite grain size grade is 10.5.
[0040] The results of the examples show that the present invention can obtain higher strength and good plasticity by adding weather-resistant elements, refining grain elements and controlling other elements. Cr layer, so as to achieve a stable and dense rust layer, improve the weather resistance of structural steel, and meet the high-strength and high-weather resistance requirements for highway guardrails.
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