STRUCTURE AND MECHANICAL PROPERTIES OF THE HEAT-AFFECTED ZONE OF RESTORED RAILWAY WHEELS

被引：3

作者：

Haivorons'kyi, O. A. ^{[1
]}

Poznyakov, V. D. ^{[1
]}

Markashova, L. I. ^{[1
]}

Ostash, O. P. ^{[2
]}

Kulyk, V. V. ^{[2
]}

Alekseenko, T. O. ^{[1
]}

Shyshkevych, O. S. ^{[1
]}

机构：

[1] Ukrainian Natl Acad Sci, Paton Inst Elect Welding, Kiev, Ukraine

[2] Ukrainian Natl Acad Sci, Karpenko Physicomech Inst, Lvov, Ukraine

来源：

MATERIALS SCIENCE | 2016年 / 51卷 / 04期

关键词：

railway wheel; electric-arc welding; heat-affected zone; low-temperature heat treatment; structural-and-phase parameters; mechanical properties;

D O I：

10.1007/s11003-016-9876-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By using the results of investigation of the influence of heat treatment of 65G steel simulating the thermal-and-deformation cycle of reconstruction welding of railway wheels, it is shown that the resistance to brittle fracture of the wheel metal in its heat-affected zone can be increased to the level of the base metal by the formation of a bainite-martensite structure in this zone and holding for 2-3 h at 100 degrees C in the course of its cooling after welding. As a result of this holding, the plasticity of the metal, its impact toughness, the fatigue threshold of cracked specimens, and cyclic fracture toughness become, respectively, 1.8, 2-3, 1.6, and 1.8 times higher and the strength remains almost constant. This is explained by the fact that the stresses of the second kind and local strains in the bulk of bainite and martensite strips become -1.5 times lower.

引用

页码：563 / 569

页数：7

共 13 条

[1]

Anokhov A. E., 2006, WELDING HEAT TREATME

[2]

[Anonymous], 1983, 5034582 RD

[3]

Gaivoronskii A.A., 2010, AVTOMAT SVARKA, P22

[4]

Gajworonski A., 2014, PRZEGLAD SPAWALNICTW, P49

[5]

Genkin I. Z., 2004, SVAR PROIZVOD, P31

[6] Microstructural and thermo-mechanical analysis of quench cracking during the production of bainitic-martensitic railway wheels [J].

Lingamanaik, Siva Naidoo ;

Chen, Bernard K. .

ENGINEERING FAILURE ANALYSIS, 2014, 40 :25-32

[7] Estimation of the strength and crack resistance of the metal of railway wheels after long-term operation [J].

Markashova, L. I. ;

Poznyakov, V. D. ;

Gaivoronskii, A. A. ;

Berdnikova, E. N. ;

Alekseenko, T. A. .

MATERIALS SCIENCE, 2012, 47 (06) :799-806

[8]

Markashova L. I., 2014, AVTOMAT SVARKA, P25

[9]

Novikov I. I., 1978, THEORY HEAT TREATMEN

[10] Influence of the mode of thermal treatment and load ratio on the cyclic crack-growth resistance of wheel steels [J].

Ostash, O. P. ;

Andreiko, I. M. ;

Kulyk, V. V. ;

Babachenko, O. I. ;

Vira, V. V. .

MATERIALS SCIENCE, 2009, 45 (02) :211-219

← 1 2 →