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公开(公告)号：US08317944B1
公开(公告)日：2012-11-27
申请号：US13282211
申请日：2011-10-26
IPC分类号： C22C38/00
CPC分类号： C21D6/002 , C21D6/02 , C21D2211/004 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C23C12/02
摘要： One or more embodiments relates to a high-temperature, titanium alloyed, 9 Cr-1 Mo steel exhibiting improved creep strength and oxidation resistance at service temperatures up to 650° C. The 9 Cr-1 Mo steel has a tempered martensite microstructure and is comprised of both large (0.5-3 μm) primary titanium carbides and small (5-50 nm) secondary titanium carbides in a ratio of. from about 1:1.5 to about 1.5:1. The 9 Cr-1 Mo steel may be fabricated using exemplary austenizing, rapid cooling, and tempering steps without subsequent hot working requirements. The 9 Cr-1 Mo steel exhibits improvements in total mass gain, yield strength, and time-to-rupture over ASTM P91 and ASTM P92 at the temperature and time conditions examined.
摘要翻译： 一个或多个实施方案涉及在高达650℃的使用温度下表现出改进的蠕变强度和抗氧化性的高温钛合金的9Cr-1 Mo钢.9Cr-1 Mo钢具有回火马氏体组织，并且是 由大（0.5-3μm）的主碳化钛和小（5-50nm）的二次碳化钛组成。 约1：1.5至约1.5：1。 9 Cr-1 Mo钢可以使用示例性的奥氏体化，快速冷却和回火步骤制造，而无需后续的热加工要求。 在所考察的温度和时间条件下，9Cr-1 Mo钢在总体质量增益，屈服强度和断裂时间方面均优于ASTM P91和ASTM P92。
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2.发明授权公开(公告)号：US08246767B1
公开(公告)日：2012-08-21
申请号：US12209488
申请日：2008-09-12
IPC分类号： C21D6/02
CPC分类号： C21D6/002 , C21D6/02 , C21D2211/004 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C23C12/02
摘要： The invention relates to a composition and heat treatment for a high-temperature, titanium alloyed, 9 Cr-1 Mo steel exhibiting improved creep strength and oxidation resistance at service temperatures up to 650° C. The novel combination of composition and heat treatment produces a heat treated material containing both large primary titanium carbides and small secondary titanium carbides. The primary titanium carbides contribute to creep strength while the secondary titanium carbides act to maintain a higher level of chromium in the finished steel for increased oxidation resistance, and strengthen the steel by impeding the movement of dislocations through the crystal structure. The heat treated material provides improved performance at comparable cost to commonly used high-temperature steels such as ASTM P91 and ASTM P92, and requires heat treatment consisting solely of austenization, rapid cooling, tempering, and final cooling, avoiding the need for any hot-working in the austenite temperature range.
摘要翻译： 本发明涉及一种高温，钛合金的9Cr-1 Mo钢的组成和热处理，其在高达650℃的使用温度下具有改进的蠕变强度和抗氧化性。组合和热处理的新颖组合产生 含有大的初级碳化钛和小的二次碳化钛的热处理材料。 主要的碳化钛有助于蠕变强度，而二次碳化钛在成品钢中保持较高水平的铬，以提高耐氧化性，并通过阻止位错通过晶体结构的运动来加强钢。 经热处理的材料与常规使用的高温钢（例如ASTM P91和ASTM P92）相当的成本提供了改进的性能，并且仅需要由奥氏体化，快速冷却，回火和最终冷却组成的热处理， 在奥氏体温度范围内工作。
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