Sulfide Transformation from Self-Lubricating to Free-Cutting in Powder Metallurgy Iron-Based Alloys

被引：4

作者：

Yang, Fang ^{[1
]}

Qin, Qian ^{[1
]}

Sun, Haixia ^{[1
]}

Liu, Peng ^{[2
]}

Guo, Zhimeng ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

[2] Univ Auckland, Dept Chem & Mat Engn, Private Bag 92019, Auckland 1142, New Zealand

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2020年 / 29卷 / 02期

基金：

中国博士后科学基金;

关键词：

in situ; iron-based alloy; mechanical properties; microstructure; sulfide; MECHANICAL-PROPERTIES; BEHAVIOR; MN; PARAMETERS; INCLUSIONS; FRACTURE; DENSITY; STEEL;

D O I：

10.1007/s11665-020-04607-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, the effects of sulfide transformation on mechanical properties and microstructure in Fe-Cu-C alloys were investigated. Taking advantages of self-lubricating and free-cutting of different sulfides, the sulfide transition in iron-based alloys mainly included two parts. Firstly, a thin layer of FeS film was coated on the iron powder surface during annealing, acting as solid lubricant to reduce the compaction friction. Then, in situ MnS with particle size of 1-2 mu m was formed followed by the reaction of FeS and Mn during sintering. Consequently, the sintered density reached to 7.34 g/cm(3) and the machinability significantly improved with less tool wear. Besides, the mechanical performance was also enhanced. The hardness increased from 80.5 HRB to 84.1 HRB, and the tensile strength increased from 590 to 631 MPa. The MnS phase was mainly distributed along the grain boundaries.

引用

页码：1034 / 1042

页数：9

共 20 条

[1]

Ariffin AK, 2011, FINITE ELEMENT MODEL

[2] On the combined effect of lubrication and compaction temperature on properties of iron-based P/M parts [J].

Babakhani, Abolfazl ;

Haerian, Ali ;

Ghambari, Mohammad .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 437 (02) :360-365

[3] New machinability enhancer responses to the challenge of machining [J].

Hu B. ;

Warzel R., III ;

Ropar S. ;

Rodrigues H. ;

Myers C. .

Metal Powder Report, 2016, 71 (03) :172-179

[4] Characterisation of inclusions in resulphurised microalloyed steel [J].

Brandaleze, E. ;

Herenu, S. ;

Tormo, J. ;

Alvarez Armas, I. .

IRONMAKING & STEELMAKING, 2013, 40 (03) :216-220

[5] Numerical model of machining considering the effect of MnS inclusions in an austenitic stainless steel [J].

Chagas, G. M. P. ;

Machado, I. F. .

15TH CIRP CONFERENCE ON MODELLING OF MACHINING OPERATIONS (15TH CMMO), 2015, 31 :533-538

[6] Microstructure and mechanical behavior of porous sintered steels [J].

Chawla, N ;

Deng, X .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 390 (1-2) :98-112

[7] Comparison of Mn, Cr and Mo alloyed sintered steels prepared from elemental powders [J].

Danninger, H ;

Pöttschacher, R ;

Bradac, S ;

Salak, A ;

Seyrkammer, J .

POWDER METALLURGY, 2005, 48 (01) :23-32

[8] Thermodynamic assessment of the Mn-S and Fe-Mn-S systems [J].

Dilner, David ;

Mao, Huahai ;

Selleby, Malin .

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, 2015, 48 :95-105

[9]

Dizdar S, 2003, ADV POWDER METALL PA, V9, P36

[10] EFFECT OF DENSITY ON TENSILE-STRENGTH, FRACTURE-TOUGHNESS, AND FATIGUE CRACK-PROPAGATION BEHAVIOR OF SINTERED STEEL [J].

FLECK, NA ;

SMITH, RA .

POWDER METALLURGY, 1981, 24 (03) :121-125

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