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发明公开
CN104928592A 一种高强耐低温钢及其热处理工艺 有权

一种高强耐低温钢及其热处理工艺
摘要：
本发明提供一种高强耐低温钢，由以下质量百分比的元素组成：镍2.0-7.05%；碳0.02-0.1%；硅0.02-0.1%；锰0.60-8.00%；铬0.3-0.5%；钼0.05-0.6%；铜0.02-0.3%；铝0.03-2.0%；磷≤0.010%；硫≤0.002%；氮0.004-0.010%；氧0.0005-0.002%；钙0.0005-0.005%；余量为铁。本发明还进一步提供了一种高强耐低温钢的热处理工艺及其应用。本发明的一种高强耐低温钢及其热处理工艺，具有良好的低温强韧性组合，能够用于制造低温环境下使用的结构钢材，并降低应用的成本，有很大的经济适用性。
摘要（英）：

The invention provides high-strength low-temperature-resistant steel. The steel is composed of, by mass, 2.0-7.05% of nickel, 0.02-0.1% of carbon, 0.02-0.1% of silicon, 0.60-8.00% of manganese, 0.3-0.5% of chrome, 0.05-0.6% of molybdenum, 0.02-0.3% of copper, 0.03-2.0% of aluminum, smaller than or equal to 0.010% of phosphorus, smaller than or equal to 0.002% of sulfur, 0.004-0.010% of nitrogen, 0.0005-0.002% of oxygen, 0.0005-0.005% of calcium, and the balance iron. The invention further provides the heat processing technology and application of the high-strength low-temperature-resistant steel. By the adoption of the high-strength low-temperature-resistant steel and the heat processing technology thereof, low-temperature toughness is high, structural steel used in a low-temperature environment can be manufactured, application cost is reduced, and economical applicability is high.

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