ادخمنابه - Iran Mavad

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KYKY- EM3200ESEM


PhilipsXL30

Kg

ASTM-E8SantamSTM-250 S

ASTM-E23

Roell AmslerRKP 300

ASTM-G99

mmmmA120M9V

Nm/s m

SW

HQK

.K

HQSW

SEM

Fe As Sn S P Ni Mo Cr Mn Si C

wt.

(˚C -min) (˚C -min)

(˚C -min)

(˚C -min)

C˚SAn85

C˚PAn90

C˚PIT55

˚CBAs35

˚CMT45

˚CMT60


SEMSAn85PAn90BAs35PIT55

MT45MT60

C˚

nm

MT45

˚C

γR

γR

γR

γR


BAs35MT45MT60

γR MT

SAn85

(HV)J

(MPa)(MPa)

SAn85

PAn90

PIT55

MT60

MT45

BAs35


C˚C˚

CMPa

BAs35

PAsSnS

CrMo

CMT60

C

C

SAn85 PAn90

MT60 PIT55

BAs35 MT45

0

2

4

6

8

10

12

14

200 300 400 500 600 700

ه رب

ضي

رژان

(J)

(HV)سختي


C

C

0

1

2

3

4

SAn85 PAn90 PIT55 BAs35 MT45 MT60

از پديده ناضيسطحي ميکروترک

ميکروخستگي در امتداد مرز دانه

جهت لغسش

اصل از ميکروترک سطحي ح

ي ميکروخستگيپديده

ميکروترک عميق حاصل از

ميکروخستگي پديده

هاي پرليتي در اثر رضکل لايهييتغ

صيد سايضد يروهاين

کندگي


C(

C(


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Tribology Handbook, Vol. 1, United States of America, 2001.

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49, 2013, 77–91. 3. J. R. Davis,"ASM specialty handbook: Cast iron", ASM International, 1996 4. Y. Wang, T. Lei, J. Liu, Tribometallogeraphic behavior of high arbon steels in dry sliding: Micro-

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United States of America, 2006, 331-376.

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steel with different microstructures, in comparison with austempered ductile iron (ADI), 2009,

Vol. 2, Issue 1, 237-241.

FMU-226

13. J. A. Hawk and R.D. Wilson, Tribology of earthmoving, mining and minerals processing, Modern

Tribology Handbook, Vol. 1, United States of America, 2001.

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properties and fracture upon static tension of the high-carbon steel with different types of pearlite

structure, the Physics of Metals and Metallography, Vol. 104, 2007, 522–534. 15. T. Wada, W. C. Hagel, Effect of trace elements, molybdenum, intercritical heat treatment on tem-

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16. L. Xu, N. F. Kennon, A study of the abrasive wear of carbon steels, Wear, Vol. 148, 1991, 101-112.


Effect of Microstructure on Wear Resistance of AG Mill Liners

Roozbeh Eshqian, Majid Abbasi*, Mahan Firoozbakht,

Mohammad Behyar Talebipour, Ahmad Ghasemian

*Corresponding Author Address: Department of Materials Engineering, Babol Noshiravani University of

Technology, Babol, Iran, P.O. Box: 484

[email protected]

Abstract Effect of microstructure on the wear resistance of AG mill liners produced from an eutectoid low alloy steel

consist of 0.75wt.% carbon and 2wt.% chromium were evaluated. For this purpose, the selected heat treat-

ment cycles were applied to achievement of pearlitic, tempered martensite and bainitic microstructures. The

pin on disk wear test was used using abrasive wheel. Microstructural evaluations were done using optical and

scanning electron microscopes and mechanical behavior were measured using Vickers hardness, tensile and

charpy impact test methods. The results show that the wear resistance is not directly related to hardness and

is related to microstructural characteristics. Also, the fine pearlitic microstructure has wear resistance near to

bainitic microstructure that can be selected microstructure for the large steel castings.

Keywords: Cast steel, Wear resistance, Heat treatment, Fine pearlite, Retained austenite.


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ادخمنابه - Iran Mavad