公开(公告)号：JP2003253397A

公开(公告)日：2003-09-10

申请号：JP2002104524

申请日：2002-02-28

Applicant: NAT INST FOR MATERIALS SCIENCE

Inventor： YAMADA KATSUMI ,  MUNEKI MASAICHI ,  OKADA KOICHI ,  IGARASHI MASAAKI ,  ABE FUJIO

IPC: F01D5/28 ,  C22C38/00 ,  C22C38/30

Abstract: PROBLEM TO BE SOLVED: To improve a high-temperature creep property in a temperature range of 650°C or higher of a martensitic heat-resistant steel, enable the higher high- temperature creep property to be kept for a long time, make the thermal expansion characteristics in the temperature range of 650°C or higher to be low, and improve the thermal fatigue characteristics. SOLUTION: In the martensitic heat-resistant steel having a martensite single- phase structure at room temperature, in which carbides do not precipitate, a structure in the temperature range of 650°C or higher has two-phases comprising an austenitic phase of a parent phase and a finely dispersed and precipitated intermetallic compound phase, or three phases comprising the austenitic phase of the parent phase, a ferritic phase and the finely dispersed and precipitated intermetallic compound phase. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2002226946A

公开(公告)日：2002-08-14

申请号：JP2001023635

申请日：2001-01-31

Applicant: NAT INST FOR MATERIALS SCIENCE ,  SUMITOMO METAL IND ,  HITACHI LTD

Inventor： HORIUCHI HISAAKI ,  IGARASHI MASAAKI ,  ABE FUJIO

IPC: C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/30 ,  C22C38/32 ,  C22C38/54

Abstract: PROBLEM TO BE SOLVED: To provide a martensitic heat resistant alloy which has excellent hot workability and ductility as well as oxidation resistance, and further has high temperature creep rupture strength at a high temperature for a long time. SOLUTION: (A) The martensitic heat resistant alloy has a composition containing, by weight, 0.03 to 0.15% C, 0.01 to 0.9% Si, 0.01 to 1.5% Mn, 8.0 to 13.0% Cr, 0.0005 to 0.015% Al, 0.007 (1); and W+1.916Mo-16.99B>2.0 (2).

公开(公告)号：EP1275744A4

公开(公告)日：2006-05-24

申请号：EP02711262

申请日：2002-01-31

Applicant: NAT INST FOR MATERIALS SCIENCE ,  SUMITOMO METAL IND ,  HITACHI LTD

Inventor： HORIUCHI TOSHIAKI ,  IGARASHI MASAAKI ,  ABE FUJIO

IPC: C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/30 ,  C22C38/32 ,  C22C38/54

CPC classification number: C22C38/26 ,  C21D6/002 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/30 ,  C22C38/32

Abstract: A heat-resistant martensite alloy in which (A) the composition consists of 0.03 to 0.15 wt.% carbon, 0.01 to 0.9 wt.% silicon, 0.01 to 1.5 wt.% manganese, 8.0 to 13.0 wt.% chromium, 0.0005 to 0.015 wt.% aluminum, up to 2.0 wt.% molybdenum, up to 4.0 wt.% tungsten, 0.05 to 0.5 wt.% vanadium, 0.01 to 0.2 wt.% niobium, 0.1 to 5.0 wt.% cobalt, 0.008 to 0.03 wt.% boron, below 0.005 wt.% nitrogen, and iron and unavoidable impurities as the remainder and (B) the contents of molybdenum, tungsten, boron, and nitrogen in terms of wt.% satisfy the following relationships (1) and (2). B - 0.772N > 0.007 (1) W + 1.916Mo - 16.99B > 2.0 (2) The heat-resistant martensite alloy is excellent not only in oxidation resistance but in suitability for hot processing and ductility, and further has a high creep rapture strength in a longer-time range at a high temperature.

公开(公告)号：DK1275744T3

公开(公告)日：2009-04-27

申请号：DK02711262

申请日：2002-01-31

Applicant: NAT INST FOR MATERIALS SCIENCE ,  SUMITOMO METAL IND ,  HITACHI LTD

Inventor： HORIUCHI TOSHIAKI ,  IGARASHI MASAAKI ,  ABE FUJIO

IPC: C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/30 ,  C22C38/32 ,  C22C38/54

Abstract: The present invention provides a martensitic heat resistant alloy having a composition (A) comprising, % by weight: 0.03 to 0.15% of C; 0.01 to 0.9% of Si; 0.01 to 1.5% of Mn; 8.0 to 13.0% of Cr; 0.0005 to 0.015% of Al; no more than 2.0% of Mo; no more than 4.0% of W; 0.05 to 0.5% of V; 0.01 to 0.2% of Nb; 0.1 to 5.0% of Co; 0.008 to 0.03% of B; less than 0.005% of N: and Fe and inevitable impurities as the remainder, wherein (B) the contents (% by weight) of Mo, W, B and N satisfy the following formulae (1) and (2). B - 0.772N > 0.007 W + 1.916Mo - 16.99B > 2.0 The martensitic heat resistant alloy of the present invention has excellent oxidation resistance, hot workability and ductility and exhibits high creep rupture strength in a range of relatively long rupture time at a high temperature.

公开(公告)号：DE60230564D1

公开(公告)日：2009-02-12

申请号：DE60230564

申请日：2002-01-31

Applicant: NAT INST FOR MATERIALS SCIENCE ,  SUMITOMO METAL IND ,  HITACHI LTD

Inventor： HORIUCHI TOSHIAKI ,  IGARASHI MASAAKI ,  ABE FUJIO

IPC: C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/30 ,  C22C38/32 ,  C22C38/54

Abstract: The present invention provides a martensitic heat resistant alloy having a composition (A) comprising, % by weight: 0.03 to 0.15% of C; 0.01 to 0.9% of Si; 0.01 to 1.5% of Mn; 8.0 to 13.0% of Cr; 0.0005 to 0.015% of Al; no more than 2.0% of Mo; no more than 4.0% of W; 0.05 to 0.5% of V; 0.01 to 0.2% of Nb; 0.1 to 5.0% of Co; 0.008 to 0.03% of B; less than 0.005% of N: and Fe and inevitable impurities as the remainder, wherein (B) the contents (% by weight) of Mo, W, B and N satisfy the following formulae (1) and (2). B - 0.772N > 0.007 W + 1.916Mo - 16.99B > 2.0 The martensitic heat resistant alloy of the present invention has excellent oxidation resistance, hot workability and ductility and exhibits high creep rupture strength in a range of relatively long rupture time at a high temperature.