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首页> 外国专利> ELECTRIC RESISTANCE WELDED STEEL TUBE FOR HIGH-STRENGTH HOLLOW STABILIZER, METHOD FOR MANUFACTURING ELECTRIC RESISTANCE WELDED STEEL TUBE FOR HIGH-STRENGTH HOLLOW STABILIZER, HIGH-STRENGTH HOLLOW STABILIZER, AND METHOD FOR MANUFACTURING HIGH-STRENGTH HOLLOW STABILIZER

ELECTRIC RESISTANCE WELDED STEEL TUBE FOR HIGH-STRENGTH HOLLOW STABILIZER, METHOD FOR MANUFACTURING ELECTRIC RESISTANCE WELDED STEEL TUBE FOR HIGH-STRENGTH HOLLOW STABILIZER, HIGH-STRENGTH HOLLOW STABILIZER, AND METHOD FOR MANUFACTURING HIGH-STRENGTH HOLLOW STABILIZER

机译：高强度中空稳定器用电阻焊接钢管，高强度中空稳定器用电阻焊接钢管，高强度中空稳定器及其制造方法

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摘要

Provided are an electric resistance welded steel pipe for a high-strength hollow stabilizer excellent in terms of corrosion fatigue resistance, a method for manufacturing the electric resistance welded steel pipe for a high-strength hollow stabilizer, a high-strength hollow stabilizer, and a method for manufacturing the high-strength hollow stabilizer.;An electric resistance welded steel pipe manufactured by performing hot diameter reduction rolling on an electric resistance welded steel pipe manufactured by performing an electric resistance welded pipe manufacturing process on a steel sheet has a chemical composition containing, by mass%, C: 0.20% to 0.40%, Si: 0.1% to 1.0%, Mn: 0.1% to 2.0%, Al: 0.01% to 0.10%, Cr: 0.01% to 0.5%, Ti: 0.01% to 0.05%, B: 0.0005% to 0.005%, Ca: 0.0001% to 0.0050%, N: 0.0050% or less, and the balance being Fe and inevitable impurities and a microstructure in which each of the amounts of TiS particles having a particle size of 10 µm or more and MnS particles having a particle size of 10 µm or more is decreased to 0.1% or less in terms of cleanliness. With this, the electric resistance welded steel pipe for a hollow stabilizer has an excellent fatigue resistance (corrosion fatigue resistance) even in a corrosive environment, exhibiting a high strength (high hardness) represented by a hardness of 400 HV or more and less than 550 HV in terms of Vickers hardness and having the average grain size of prior austenite grains of 50 µm or less when subjected to cold forming followed by a quenching and tempering treatment.
机译：本发明提供耐腐蚀性优异的高强度中空稳定器用电阻焊钢管，高强度中空稳定器用电阻焊钢管的制造方法，高强度中空稳定剂。高强度空心稳定剂的制造方法。通过对钢板进行电阻焊管的制造工序而制造的电阻焊钢管进行热减径轧制而制造的电阻焊钢管的化学组成为，以质量％计，C：0.20％至0.40％，Si：0.1％至1.0％，Mn：0.1％至2.0％，Al：0.01％至0.10％，Cr：0.01％至0.5％，Ti：0.01％至0.05％，B：0.0005％〜0.005％，Ca：0.0001％〜0.0050％，N：0.0050％以下，余量为Fe和不可避免的杂质，且TiS粒子的各个量具有粒径的微结构。大于等于10 µm且颗粒为MnS就清洁度而言，具有10μm以上的粒径的颗粒降低至0.1％以下。由此，中空稳定器用电阻焊钢管即使在腐蚀性环境下也具有优异的耐疲劳性（耐腐蚀疲劳性），并且表现出以400HV以上且小于550的硬度表示的高强度（高硬度）。 HV以维氏硬度计，经过冷成型后进行淬火和回火处理，其原始奥氏体晶粒的平均晶粒尺寸为50μm或更小。

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