Effects of titanium on ferrite continuous cooling transformation curves of high-thickness Cr-Mo steels

被引：2

作者：

Lee, Sang-Hoon ^{[1
]}

Na, Hye-Sung ^{[2
]}

Park, Gi-Deok ^{[2
]}

Kim, Byung-Hoon ^{[3
]}

Song, Sang-Woo ^{[1
]}

Kang, Chung-Yun ^{[2
]}

机构：

[1] Korea Inst Mat Sci, Ind Technol Support Div, Chang Won 641831, South Korea

[2] Pusan Natl Univ, Dept Mat Sci & Engn, Pusan 609735, South Korea

[3] Doosan Heavy Ind & Construct, Corp R&D Inst, Chang Won 641792, Gyeongnam, South Korea

来源：

METALS AND MATERIALS INTERNATIONAL | 2013年 / 19卷 / 05期

关键词：

alloys; phase diagram; phase transformation; precipitation; dilatometry; GRAIN-BOUNDARY SEGREGATION; ACICULAR FERRITE; NONMETALLIC INCLUSIONS; TEMPER EMBRITTLEMENT; HOT DUCTILITY; LOW-CARBON; TI; NUCLEATION; MN; MICROSTRUCTURE;

D O I：

10.1007/s12540-013-5002-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of Ti on the ferrite-phase transformation in the middle portion of high-thickness Cr-Mo steel vessels was studied. The phase diagrams and ferrite continuous cooling transformation (CCT) curves were calculated thermodynamically, and dilatometry tests were performed to determine the start and finish times of the ferrite transformation. When the Ti concentration was 0.015 mass%, Delta(F (s) -F (f) ) of ferrite CCT curve decreased owing to an increase in the concentration of Mn dissolved as a result of (Mn, Ti) oxide formation. When the Ti concentration was 0.03 mass% or greater, the ferrite CCT curves shifted considerably to the right along the time axis owing to an increase in Ti oxide formation and the precipitation of Ti4C2S2, both of which affect the concentration of Mn dissolved in the austenite matrix. As a result, a completely bainitic structure was obtained when the Ti concentration was 0.03 mass% or greater.

引用

页码：907 / 915

页数：9

共 31 条

[1]

ANDREWS KW, 1965, J IRON STEEL I, V203, P721

[2] FORMATION OF ACICULAR FERRITE AT OXIDE PARTICLES IN STEELS [J].

BARBARO, FJ ;

KRAUKLIS, P ;

EASTERLING, KE .

MATERIALS SCIENCE AND TECHNOLOGY, 1989, 5 (11) :1057-1068

[3] SUPERHARDENING IN MEDIUM-CARBON STEEL [J].

BROWN, GT ;

JAMES, BA .

METALS TECHNOLOGY, 1980, 7 (JUL) :261-268

[4] Non-metallic inclusion and intragranular nucleation of ferrite in Ti-killed C-Mn steel [J].

Byun, JS ;

Shim, JH ;

Cho, YW ;

Lee, DN .

ACTA MATERIALIA, 2003, 51 (06) :1593-1606

[5] Effect of Ti addition on mixed microstructure of allotriomorphic and bainitic ferrite in wrought C-Mn steels [J].

Cho, YW ;

Byun, JS ;

Shim, JH .

THERMEC'2003, PTS 1-5, 2003, 426-4 :1511-1516

[6] EFFECT OF MN AND TI PRECIPITATES ON THE HOT DUCTILITY OF LOW-CARBON AND ULTRA-LOW CARBON-STEELS [J].

GAO, Y ;

SORIMACHI, K .

ISIJ INTERNATIONAL, 1995, 35 (07) :914-919

[7]

GARBARZ B, 1988, MATER SCI TECH SER, V4, P967, DOI 10.1179/026708388790330015

[8] Solid-state nucleation of acicular ferrite on minerals added to molten steel [J].

Gregg, JM ;

Bhadeshia, HKDH .

ACTA MATERIALIA, 1997, 45 (02) :739-748

[9] Effect of Precipitates on Hot Ductility Behavior of Steel Containing Ti and Nb [J].

Han, Won Bae ;

Lee, Jong Ho ;

Kim, Hee-Soo ;

An, Hyeun Hwan ;

Lee, Seung Jae ;

Kim, Seong Woo ;

Seo, Seok Jong ;

Yoon, Chong Seung .

KOREAN JOURNAL OF METALS AND MATERIALS, 2012, 50 (04) :285-292

[10] SURFACE AND GRAIN-BOUNDARY SEGREGATION RELATED TO THE TEMPER EMBRITTLEMENT OF A21/4CR-1MO STEEL [J].

HO, P ;

MITCHELL, DF ;

GRAHAM, MJ .

APPLIED SURFACE SCIENCE, 1983, 15 (1-4) :108-119

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