Weathering steel for photovoltaic support and production method of weathering steel

A technology of photovoltaic support and production method, which is applied in the field of iron and steel smelting, can solve the problems of difficult matching of comprehensive performance and applicability, and achieve the effects of improving phase deformation nuclei, shortening diffusion stroke, and good low-temperature toughness

Pending Publication Date: 2022-05-06
ANYANG IRON & STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention proposes a weather-resistant steel for photovoltaic support and its production method, which solves the problem that the comprehensive performance and applicability are not easy to match when the weather-resistant steel in the prior art is applied to a photovoltaic support.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The specific implementation steps of a kind of weathering steel for photovoltaic support and its production method in this embodiment are as follows:

[0033] The mass percentage of smelting components is: C: 0.061%; Si: 0.36%; Mn: 0.55%; P: 0.011%; S: ≤0.002%; Nb: 0.015%; Ti: 0.013%; %; Cr: 0.50%; N: 0.0049%; Ca: 0.0015%; the rest is Fe and unavoidable impurity elements;

[0034] The calculation method of corrosion resistance index is: I=26.01Cu+3.88Ni+1.2Cr+1.49Si+17.28P-7.92CuNi-9.1NiP-33.39Cu2=6.37;

[0035] The calculation method of welding cold crack sensitivity coefficient is: Pcm=C+Si / 30+(Mn+Cu+Cr) / 20+Mo / 15+Ni / 60+V / 10+5B=0.15;

[0036] A production method of weathering steel for photovoltaic supports, comprising the following steps:

[0037] Step 1: smelt qualified molten steel through molten iron pretreatment, top-bottom combined blowing converter, LF external refining, and RH vacuum degassing furnace, wherein the end point sulfur of molten iron pretreatment ...

Embodiment 2

[0045] The specific implementation steps of a kind of weathering steel for photovoltaic support and the production method of the present embodiment are as follows:

[0046] C: 0.043%; Si: 0.35%; Mn: 0.86%; P; 0.014%; S: ≤0.001%; ​​Nb: 0.028%; Ti: 0.012%; Ni: 0.15%; ; N: 0.0051%; Ca: 0.0017%; the rest is Fe and unavoidable impurity elements;

[0047] Calculation of corrosion resistance index: I=26.01Cu+3.88Ni+1.2Cr+1.49Si+17.28P-7.92CuNi-9.1NiP-33.39Cu2=6.6;

[0048] Calculation of welding cold crack sensitivity coefficient: Pcm=C+Si / 30+(Mn+Cu+Cr) / 20+Mo / 15+Ni / 60+V / 10+5B=0.15;

[0049] A production method of weathering steel for photovoltaic supports, comprising the following steps:

[0050] Step 1: smelting qualified molten steel through molten iron pretreatment, top-bottom combined blowing converter, LF external refining, and RH vacuum degassing furnace. Among them, the sulfur at the end point of molten iron pretreatment is 8ppm; the end point oxygen of the top-bottom combi...

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Abstract

The invention relates to the technical field of steel and iron smelting, discloses weathering steel for a photovoltaic support and a production method of the weathering steel, and provides the following scheme aiming at the problem that when the weathering steel in the prior art is applied to the photovoltaic support, the comprehensive mechanical property is not easily matched with the applicability of the steel for the photovoltaic support. 0.20% to 0.50% of Si; mn: 0.3 to 1.20%; less than or equal to 0.020% of P; s: < = 0.005%; 0.01 to 0.05 percent of Nb; 0.010% to 0.030% of Ti; ni: 0.05 to 0.30%; 0.20% to 0.50% of Cu; 0.4 to 0.8 percent of Cr; n: < = 0.006%; the content of Ca is 0.0010 to 0.0030 percent; and the balance of Fe and inevitable impurity elements. The weathering resistant steel for the photovoltaic support has good weathering resistance, reprocessability, weldability and low-temperature toughness.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a weathering steel for a photovoltaic support and a production method thereof. Background technique [0002] Photovoltaic power generation is a kind of green environmental protection industry. Photovoltaic support is an important support and protection structure for photovoltaic power generation devices. In order to prevent corrosion of photovoltaic brackets, Q235 and Q355 material steel coils or light profiles are mostly used for galvanizing after processing. However, hot-dip galvanized products will cause pollution during production, which greatly increases the cost of treatment. In addition, photovoltaic power generation devices are mostly located in relatively open hillsides, sandy land or pond areas, and the photovoltaic panel area is relatively large. When impacted by wind, sand, rain and snow, the reciprocating impact force transmitted to the bracket is r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/48C22C38/50C21C7/072C21C7/10C21D8/02C22C33/04
CPCC22C38/02C22C38/04C22C38/48C22C38/50C22C38/42C22C38/001C22C38/002C22C33/04C21C7/10C21C7/072C21D8/0205C21D8/0226C21D8/0263C21D2211/005C21D2211/009
Inventor 王新志欧阳瑜武宝庆黄重李娜孔德南张振申夏志升王中岐徐党委王海燕管刘辉张苓志王军
Owner ANYANG IRON & STEEL
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