公开(公告)号：US07255755B2

公开(公告)日：2007-08-14

申请号：US10195703

申请日：2002-07-15

申请人： Philip J. Maziasz ,  Tim McGreevy ,  Michael James Pollard ,  Chad W. Siebenaler ,  Robert W. Swindeman

发明人： Philip J. Maziasz ,  Tim McGreevy ,  Michael James Pollard ,  Chad W. Siebenaler ,  Robert W. Swindeman

IPC分类号： C22C38/58

CPC分类号： C22C38/02 ,  C21D6/005 ,  C22C38/001 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/52 ,  C22C38/58

摘要： A cast stainless steel alloy and articles formed therefrom containing about 0.5 wt. % to about 10 wt. % manganese, 0.02 wt. % to 0.50 wt. % N, and less than 0.15 wt. % sulfur provides high temperature strength both in the matrix and at the grain boundaries without reducing ductility due to cracking along boundaries with continuous or nearly-continuous carbides. Alloys of the present invention also have increased nitrogen solubility thereby enhancing strength at all temperatures because nitride precipitates or nitrogen porosity during casting are not observed. The solubility of nitrogen is dramatically enhanced by the presence of manganese, which also retains or improves the solubility of carbon thereby providing additional solid solution strengthening due to the presence of manganese and nitrogen, and combined carbon. Such solution strengthening enhances the high temperature precipitation-strengthening benefits of fine dispersions of NbC. Such solid solution effects also enhance the stability of the austenite matrix from resistance to excess sigma phase or chrome carbide formation at higher service temperatures. The presence of sulfides is substantially eliminated.

摘要翻译： 铸造的不锈钢合金和由其形成的制品含有约0.5wt。 ％至约10wt。 ％锰，0.02重量％ ％至0.50重量％ ％N，小于0.15wt。 ％硫在基体和晶界处均提供高温强度，而不会因连续或几乎连续的碳化物沿边界开裂而降低延展性。 本发明的合金还具有增加的氮溶解度，从而在所有温度下增强强度，因为没有观察到铸造期间的氮化物沉淀或氮气孔隙。 由于锰的存在，氮的溶解度显着提高，这也保留或提高了碳的溶解度，从而由于锰和氮以及组合碳的存在而提供额外的固溶强化。 这种溶液强化提高了NbC细分散体的高温析出强化效果。 这种固溶效应还提高了奥氏体基体在较高使用温度下从耐过剩σ相或碳化铬形成的稳定性。 基本上消除了硫化物的存在。

公开(公告)号：USRE41504E1

公开(公告)日：2010-08-17

申请号：US12230179

申请日：2008-08-25

申请人： Philip J. Maziasz ,  Tim McGreevy ,  Michael James Pollard ,  Chad W. Siebenaler ,  Robert W. Swindeman

发明人： Philip J. Maziasz ,  Tim McGreevy ,  Michael James Pollard ,  Chad W. Siebenaler ,  Robert W. Swindeman

IPC分类号： C22C38/58

CPC分类号： C22C38/02 ,  C21D6/005 ,  C22C38/001 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/52 ,  C22C38/58

摘要： A CF8C type stainless steel alloy and articles formed therefrom containing about 18.0 weight percent to about 22.0 weight percent chromium and 11.0 weight percent to about 14.0 weight percent nickel; from about 0.05 weight percent to about 0.15 weight percent carbon; from about 2.0 weight percent to about 10.0 weight percent manganese; and from about 0.3 weight percent to about 1.5 weight percent niobium. The present alloys further include less than 0.15 weight percent sulfur which provides high temperature strength both in the matrix and at the grain boundaries without reducing ductility due to cracking along boundaries with continuous or nearly-continuous carbides. The disclosed alloys also have increased nitrogen solubility thereby enhancing strength at all temperatures because nitride precipitates or nitrogen porosity during casting are not observed. The solubility of nitrogen is dramatically enhanced by the presence of manganese, which also retains or improves the solubility of carbon thereby providing additional solid solution strengthening due to the presence of manganese and nitrogen, and combined carbon.

摘要翻译： CF8C型不锈钢合金和由其形成的制品含有约18.0重量％至约22.0重量％的铬和11.0重量％至约14.0重量％的镍; 约0.05重量％至约0.15重量％的碳; 约2.0重量％至约10.0重量％的锰; 和约0.3重量％至约1.5重量％的铌。 本发明的合金还包括小于0.15重量％的硫，其在基体和晶界处都提供高温强度，而不会由于沿连续或几乎连续的碳化物的边界开裂而降低延展性。 所公开的合金还具有增加的氮溶解度，从而在所有温度下增强强度，因为未观察到铸造期间的氮化物沉淀或氮气孔隙。 由于锰的存在，氮的溶解度显着提高，这也保留或提高了碳的溶解度，从而由于锰和氮以及组合碳的存在而提供额外的固溶强化。

公开(公告)号：USRE41100E1

公开(公告)日：2010-02-09

申请号：US12230257

申请日：2008-08-26

申请人： Philip J. Maziasz ,  Tim McGreevy ,  Michael James Pollard ,  Chad W. Siebenaler ,  Robert W. Swindeman

发明人： Philip J. Maziasz ,  Tim McGreevy ,  Michael James Pollard ,  Chad W. Siebenaler ,  Robert W. Swindeman

IPC分类号： C22C38/58

CPC分类号： C22C38/02 ,  C21D6/005 ,  C22C38/001 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/52 ,  C22C38/58

摘要： A cast stainless steel alloy and articles formed therefrom containing about 0.5 wt. % to about 10 wt. % manganese, 0.02 wt. % to 0.50 wt. % N, and less than 0.15 wt. % sulfur provides high temperature strength both in the matrix and at the grain boundaries without reducing ductility due to cracking along boundaries with continuous or nearly-continuous carbides. Alloys of the present invention also have increased nitrogen solubility thereby enhancing strength at all temperatures because nitride precipitates or nitrogen porosity during casting are not observed. The solubility of nitrogen is dramatically enhanced by the presence of manganese, which also retains or improves the solubility of carbon thereby providing additional solid solution strengthening due to the presence of manganese and nitrogen, and combined carbon. Such solution strengthening enhances the high temperature precipitation-strengthening benefits of fine dispersions of NbC. Such solid solution effects also enhance the stability of the austenite matrix from resistance to excess sigma phase or chrome carbide formation at higher service temperatures. The presence of sulfides is substantially eliminated.

摘要翻译： 铸造的不锈钢合金和由其形成的制品含有约0.5wt。 ％至约10wt。 ％锰，0.02重量％ ％至0.50重量％ ％N，小于0.15wt。 ％硫在基体和晶界处均提供高温强度，而不会因连续或几乎连续的碳化物沿边界开裂而降低延展性。 本发明的合金还具有增加的氮溶解度，从而在所有温度下增强强度，因为没有观察到铸造期间的氮化物沉淀或氮气孔隙。 由于锰的存在，氮的溶解度显着提高，这也保留或提高了碳的溶解度，从而由于锰和氮以及组合碳的存在而提供额外的固溶强化。 这种溶液强化提高了NbC细分散体的高温析出强化效果。 这种固溶效应还提高了奥氏体基体在较高使用温度下从耐过剩σ相或碳化铬形成的稳定性。 基本上消除了硫化物的存在。

公开(公告)号：US07153373B2

公开(公告)日：2006-12-26

申请号：US10195724

申请日：2002-07-15

申请人： Philip J. Maziasz ,  Tim McGreevy ,  Michael James Pollard ,  Chad W. Siebenaler ,  Robert W. Swindeman

发明人： Philip J. Maziasz ,  Tim McGreevy ,  Michael James Pollard ,  Chad W. Siebenaler ,  Robert W. Swindeman

IPC分类号： C22C38/58

CPC分类号： C22C38/02 ,  C21D6/005 ,  C22C38/001 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/52 ,  C22C38/58

摘要： A CF8C type stainless steel alloy and articles formed therefrom containing about 18.0 weight percent to about 22.0 weight percent chromium and 11.0 weight percent to about 14.0 weight percent nickel; from about 0.05 weight percent to about 0.15 weight percent carbon; from about 2.0 weight percent to about 10.0 weight percent manganese; and from about 0.3 weight percent to about 1.5 weight percent niobium. The present alloys further include less than 0.15 weight percent sulfur which provides high temperature strength both in the matrix and at the grain boundaries without reducing ductility due to cracking along boundaries with continuous or nearly-continuous carbides. The disclosed alloys also have increased nitrogen solubility thereby enhancing strength at all temperatures because nitride precipitates or nitrogen porosity during casting are not observed. The solubility of nitrogen is dramatically enhanced by the presence of manganese, which also retains or improves the solubility of carbon thereby providing additional solid solution strengthening due to the presence of manganese and nitrogen, and combined carbon.