公开(公告)号：US09556503B1

公开(公告)日：2017-01-31

申请号：US14871774

申请日：2015-09-30

Applicant: Jeffrey A. Hawk ,  Paul D. Jablonski ,  Christopher J. Cowen

Inventor： Jeffrey A. Hawk ,  Paul D. Jablonski ,  Christopher J. Cowen

IPC: C22C38/44 ,  C22C38/54 ,  C22C38/52 ,  C22C38/48 ,  C22C38/46 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

CPC classification number: C22C38/54 ,  C21D6/00 ,  C21D6/002 ,  C21D6/02 ,  C21D8/00 ,  C21D8/005 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/004 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/40 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/52

Abstract: The disclosure provides a creep resistant alloy having an overall composition comprised of iron, chromium, molybdenum, carbon, manganese, silicon, nickel, vanadium, niobium, nitrogen, tungsten, cobalt, tantalum, boron, copper, and potentially additional elements. In an embodiment, the creep resistant alloy has a molybdenum equivalent Mo(eq) from 1.475 to 1.700 wt. % and a quantity (C+N) from 0.145 to 0.205. The overall composition ameliorates sources of microstructural instability such as coarsening of M23C6carbides and MX precipitates, and mitigates or eliminates Laves and Z-phase formation. A creep resistant martensitic steel may be fabricated by preparing a melt comprised of the overall composition followed by at least austenizing and tempering. The creep resistant alloy exhibits improved high-temperature creep strength in the temperature environment of around 650° C.

Abstract translation: 本公开提供了具有由铁，铬，钼，碳，锰，硅，镍，钒，铌，氮，钨，钴，钽，硼，铜和潜在附加元素组成的总体组成的抗蠕变合金。 在一个实施方案中，耐蠕变合金具有钼当量Mo（eq），为1.475至1.700wt。 ％，数量（C + N）为0.145〜0.205。 整体组成改善了微结构不稳定性的来源，如M23C6碳化物和MX沉淀物的粗化，减轻或消除了Laves和Z相的形成。 耐蠕变马氏体钢可以通过制备由整体组成组成的熔体，然后至少进行奥氏体化和回火来制造。 耐蠕变合金在约650℃的温度环境中表现出改善的高温蠕变强度。

公开(公告)号：US09181597B1

公开(公告)日：2015-11-10

申请号：US13868139

申请日：2013-04-23

Applicant: Jeffrey A. Hawk ,  Paul D. Jablonski ,  Christopher J. Cowen

Inventor： Jeffrey A. Hawk ,  Paul D. Jablonski ,  Christopher J. Cowen

IPC: C22C38/44 ,  C21D8/00 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/46 ,  C22C38/48 ,  C22C38/52 ,  C22C38/54 ,  C22C38/40

CPC classification number: C22C38/54 ,  C21D6/00 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D6/02 ,  C21D8/00 ,  C21D8/005 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/004 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/40 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/52

Abstract: The disclosure provides a creep resistant alloy having an overall composition comprised of iron, chromium, molybdenum, carbon, manganese, silicon, nickel, vanadium, niobium, nitrogen, tungsten, cobalt, tantalum, boron, and potentially additional elements. In an embodiment, the creep resistant alloy has a molybdenum equivalent Mo(eq) from 1.475 to 1.700 wt. % and a quantity (C+N) from 0.145 to 0.205. The overall composition ameliorates sources of microstructural instability such as coarsening of M23C6 carbides and MX precipitates, and mitigates or eliminates Laves and Z-phase formation. A creep resistant martensitic steel may be fabricated by preparing a melt comprised of the overall composition followed by at least austenizing and tempering. The creep resistant alloy exhibits improved high-temperature creep strength in the temperature environment of around 650° C.

Abstract translation: 本公开提供了具有由铁，铬，钼，碳，锰，硅，镍，钒，铌，氮，钨，钴，钽，硼和潜在的附加元素组成的总体组成的抗蠕变合金。 在一个实施方案中，耐蠕变合金具有钼当量Mo（eq），为1.475至1.700wt。 ％，数量（C + N）为0.145〜0.205。 整体组成改善了微观结构不稳定的来源，如M23C6碳化物和MX沉淀物的粗化，减轻或消除了Laves和Z相的形成。 耐蠕变马氏体钢可以通过制备由整体组成组成的熔体，然后进行至少奥氏体化和回火来制造。 耐蠕变合金在约650℃的温度环境中表现出改善的高温蠕变强度。