公开(公告)号：US20190078182A1

公开(公告)日：2019-03-14

申请号：US15999414

申请日：2018-08-20

申请人： ExxonMobil Chemical Company - Law Technology

发明人： ChangMin Chun ,  Jorge J. Perdomo

IPC分类号： C22C30/00 ,  C22C19/05 ,  C22C38/48 ,  C22C38/06 ,  C22C38/00 ,  C10G9/20

CPC分类号： B01J19/0026 ,  B01J19/002 ,  B01J19/02 ,  B22D13/00 ,  B22D13/02 ,  C10G9/203 ,  C10G9/36 ,  C21D9/08 ,  C22C19/05 ,  C22C19/055 ,  C22C19/058 ,  C22C30/00 ,  C22C38/005 ,  C22C38/04 ,  C22C38/06 ,  C22C38/38 ,  C22C38/40 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/54 ,  C23C8/10 ,  F16L9/02 ,  F16L58/08

摘要： This application relates to a heat transfer tube, its method of manufacture and its use for thermal cracking hydrocarbon feeds, such as thermal cracking in furnaces. The heat transfer tube comprises a chromium and aluminum carburization-resistant alloy capable of generating a typically continuous aluminum oxide scale under thermal cracking conditions that reduces coking and thereby enhances heat transfer. The carburization-resistant alloy comprises 25.1 to 55.0 wt. % nickel; 18.1 to 23.9 wt. % chromium; 4.1 to 7.0 wt. % aluminum; and iron. Additionally, the carburization-resistant alloy has at least one strengthening mechanism to provide desirable mechanical properties. The carburization-resistant alloy composition is also resistant to the formation of cracks during centrifugal casting.