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2. Complex alloyed molybdenum steels and alloys possess a
maximum grain anisotropy. Index of anisotropy for this steel is
within 1.8-2.0 at a rapid heating
3. Increase in duration of isothermal heating results in an increase
in the grain anisotropy proportionally to the heating temperature
References:
1. I.L. Mayevsky. Plastic working of heat-resistant alloy. Мoscow, Mashinostroyenie
Publishers, 1964. p123
2. Ye.Ya. Lezinskaya. Investigation of effect of heating conditions on recrystallization
processes during heat treatment of cold-worked stainless and heat-resistant steels.
Cand. Sc Theses, VNITI. Dnepropetrovsk. 1972. p155
3. Ye.Ya. Lezinskaya. Меthods of control of structure anisotropy during heat treatment
of tubes made of high-alloy steels and alloys // Proizvodstvo Trub I Ballonov
(Manufacture of tubes and cylinders). Dnepropetrovsk: ДТИ, 1999. pp. 109-116
4. V.V.Perchanik, Ye.Ya.Lezinskaya, D.Yu.Klyuev. Application of the stereology
reconstruction methods in assessment of the spatial grain structure of metals and
alloys. Tube & Pipe Technology Magazine. November 2010 – p114
5. V.V.Perchanik, Ye.Ya.Lezinskaya, Ye.V. Gulkin, D.Yu.Klyuev. The new method of
reconstruction of grain structures by a planar section. Report 2. // Теоriya I Praktika
Metallurgii. - No.6. Dnepropetrovsk – 2007. – pp. 50-56
Item
Name
Unit
Value
1 Number of objects (grains)
pcs
6385
2 Maximum grain size
μm 148.90
3 Average grain diameter in a volume
μm
29.62
4 Mean square deviation
μm
20.86
5 Coefficient of variation
0.70
6 Number of grains in 1 mm
2
of microsections
pcs
1848
7 Total grain area
mm
2
0.20832358
8 Number of grains in 1 mm
3
of volume
pcs
79442
9 Grain number according to standard GOST 5639
8
10 Grain number according to standard ASTM E 112
7.5
Coefficient of variation of the structure
In a volume
In a plane
In a line
0.7
0.71
0.72
Item
Name
Unit
Value
1 Number of objects (grains)
pcs
695
2 Maximum grain size
μm
37.67
3 Average grain diameter in a volume
μm
10.17
4 Mean square deviation
μm
4.83
5 Coefficient of variation
0.48
6 Number of grains in 1 mm
2
of microsections
pcs
12784
7 Total grain area
mm
2
0.05436324
8 Number of grains in 1 mm
3
of volume
pcs
1445440
9 Grain number according to standard GOST 5639
11
10 Grain number according to standard ASTM E 112
10.5
Coefficient of variation of the structure
In a volume
In a plane
In a line
0.48
0.54
0.57
Structure after computer processing
Structure after computer processing
Structure of initial plain section
(microsections)
Structure of initial plain section
(microsections)
Figure 1
:
Characteristics of a comparatively homogeneous structure
6. D.Yu.Klyuev, Ye.Ya.Lezinskaya, V.V.Perchanik. Assessment of correctness of
utilisation of a spherical grain shape in reconstruction of spatial structure of metals
and alloys // Теоriya I Praktika Metallurgii. - No. 3-4. Dnepropetrovsk – 2010. – pp.
70-74
7. Inventor’s Certificate No.1577 Ukraine. Software STRUCTURE 2001/ V.V.Perchanik,
D.Yu.Klyuev, Ye.Ya.Lezinskaya, Ye.V. Gulkin - No. 15901.:Application date 27.12.2006;
Published in Bulleten DDIV “Authors Right and other rights” No.9, 2006
8. Т.P. Danilenko. Оptimization of thermal treatment regimes for especially thin-walled
tubes of austenitic steels based on the development of a new method for determination
of spatial structure parameters. Cand.Sc. Theses. Dnepropetrovsk. 1988. p226
9. М.N. Bodiako, S.А. Astapchik, G.B. Yaroshevich. Тhermikinetics of recrystallization //
Nayka I Tekhnika. Мinsk. 1968. p249
10. V.I. Ivanov, К.А.Оsipov. Return and recrystallization in alloys during rapid heating.
Наuka Publishers. Моscow.1964. p185
Figure 2
:
Characteristics of an anisomery structure
For more information please contact:
Nataliya Koryaka
Representative of International Tube Association in CIS countries
Tel: +380 56 744 25 16
Email:
koryakan@gmail.com