Thermodynamic Calculations for the Investigation of Phase Formation in Boron-Modified Ferritic Stainless Steel

被引：9

作者：

Lopes, Thiago Pama ^{[1
]}

Soyama, Juliano ^{[2
]}

Zepon, Guilherme ^{[2
]}

Costa Nascimento, Alexandre Romao ^{[2
]}

Costa e Silva, Andre ^{[3
]}

Kiminami, Claudio Shyinti ^{[2
]}

Botta, Walter Jose ^{[2
]}

Bolfarini, Claudemiro ^{[2
]}

机构：

[1] Univ Fed Sao Carlos UFSCar, Programa Posgrad Ciencia & Engn Mat PPGCEM, Rodovia Washington Luis,Km 235, BR-13565905 Sao Carlos, SP, Brazil

[2] Univ Fed Sao Carlos UFSCar, Dept Engn Mat DEMa, Rodovia Washington Luis,Km 235, BR-13565905 Sao Carlos, SP, Brazil

[3] Escola Engn Ind Met Volta Redonda UFF, VMT Dept Engn Met & Mat, Ave Trabalhadores 420, BR-27255125 Volta Redonda, Brazil

来源：

JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION | 2017年 / 38卷 / 03期

基金：

巴西圣保罗研究基金会;

关键词：

experimental study; iron alloys; microstructure; thermodynamic computations; MICROSTRUCTURE; CHALLENGES; AUSTENITE;

D O I：

10.1007/s11669-017-0550-y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thermodynamic calculations in equilibrium condition were used to investigate the phase formation sequence and microstructure formation in a boron-modified ferritic stainless steel. The results were also compared with spray forming experimental heats. The thermodynamic calculations indicated that there is an eutectic point at around 1.1 wt.% B and therefore two different compositions (hypo and hypereutectic) were experimentally investigated. For the hypoeutectic composition, the primary phase to form from the melt was delta-ferrite with the boride phase M2B originating eutectically. Conversely, for the hypereutectic composition, the boride M2B was formed as the primary phase. The prediction of phase formation and stable phases at room temperature was accurate. The calculated melting temperatures showed considerable deviation from values measured by Differential Scanning Calorimetry. The final spray formed microstructure and the phase fractions were to some extent in accordance with the thermodynamic calculations.

引用

页码：343 / 349

页数：7

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[1] Hardfacing Technologies for Improvement of Wear Characteristics of Hot Working Tools: A Review [J].