Abstract

This paper deals with the discovered property of additional steel strengthening (superstrengthening), which is observed at high cooling rates within the martensite range. It has been shown that the cooling intensification before the martensite start (Ms) does not result in the additional strengthening of the martensite structure of the material. Only over-critical high cooling rates within the martensite range gives positive effect. This discovered property can be used in practice at two-stage quenching. At the first stage the parts of alloy steels are cooled slowly to avoid distortion and cracks, and at the second stage the parts are cooled at the maximum cooling rate to get the effect of additional strengthening of material, which has the martensite structure. In this case the second stage and part's washing may be a single process.

Issue Section:
Research Papers
Keywords:
intensive quenching, density of dislocations, additional strengthening, superstrengthening, improved plastic properties, service life, new methods

References

1.
Kobasko
,
N. I.
, “
Effect of Structural and Thermal Stresses Upon Crack Formation During Steel Quenching
,”
All-Union Conference on Increase in Productivity and Profitability of Heating Furnaces
,
Dnipropetrovsk, Ukraine
,
1967
, pp.
26
-
27
.
2.
Kobasko
,
N. I.
, “
Strengthening of Steel by Increasing Heat Transfer in the Martensitic Transformation Range
,”
Russ. Met.
,
1
,
1979
, pp.
123
-
129
.
3.
Kobasko
,
N. I.
,
Steel Quenching in Liquid Media Under Pressure
,
Kyiv
,
Naukova Dumka
,
1980
, 206 pp.
4.
Ganiev
 
R. F.
,
Kobasko
 
N. I.
, and
Kulik
 
V. V.
, et al,
Oscillation Phenomena in Multi-Phase Media and Their use in Technology
,
Kiev, Tekhnika
,
1980
, 142 pp.
5.
Kobasko
,
N. I.
, “
Intensive Steel Quenching Methods
,”
Theory and Technology of Quenching
,
B.
 
Liscic
,
H. M.
 
Tensi
, and
W.
 
Luty
, Eds.,
Berlin
,
Springer-Verlag
,
1992
, pp.
367
-
389
.
Google Scholar
Crossref
Search ADS
 
6.
Gul
,
Yu. P.
,
Chmeleva
,
V. S.
, and
Kirichenko
,
V. V.
,
Contemporary Aspects of Steel Quench Cooling
,
MiTOM
,
1989
, No. 9, pp.
2
-
6
.
7.
Sverdlin
,
A.
,
Ness
,
R.
, and
Ganiev
, “
New Method of Heat Treatment Using the Wave Technology
,”
Proc. of the 22nd Heat Treating Society and 2nd International Surface Engineering Congress
, 15–17 Sept. 2003,
Indianapolis, IN
, pp.
77
-
83
.
8.
Oding
 
I. A.
,
Ivanova
 
V. S.
,
Burdukskiy
,
V. V.
, and
Gelinov
,
V. N.
,
Theory of Creep and Durability of Metals
,
Moscow
,
Metallurgizdat
,
1959
, 488 pp.
9.
Ivanova
,
V. S.
 and
Gordienko
,
L. K.
,
New Ways of Increasing the Strength of Metals
,
Moscow
,
Nauka
,
1964
, 118 pp.
10.
Kobasko
,
N. I.
 and
Prokhorenko
,
N. I.
,
Effect of Cooling Rate During Quenching Upon Crack Formation in Steel 45
,
MiTOM
, No.
2
,
1964
, pp.
53
-
54
.
11.
Kobasko
,
N. I.
, “
Basics of Intensive Quenching
,”
Advanced Materials & Processes/Heat Treating Progress
, Part I, Vol.
148
, No. 3,
09
1995
, pp.
42W
-
42Y
.
12.
Kobasko
,
N. I.
,
Self-Regulated Thermal Process During Part Quenching
,
Promteplotekhnika
, Vol.
20
, No.
5
,
1998
, pp.
10
-
14
.
13.
Kobasko
,
N. I.
,
Increase in Service Life and Durability of Parts for the Account of Using New Steel Quenching Methods
,
MiTOM
, No.
9
,
1989
, pp.
7
-
14
.
14.
Yukio
,
H.
,
Motozo
,
N.
, and
Shigeharu
,
K.
, “
One Consideration on the Strengthening Mechanism of Ausformal Steel
,”
Bull. Fac. Educ.
,
Kanzawa Univ. Nat. Sci.
,
1974
, No.
23
, pp.
35
-
43
.
15.
Mukhina
,
M. P.
,
Kobasko
,
N. I.
, and
Gordeyeva
,
L. V.
,
Quenching of Construction Steels in Chloride-Based Quenchants
,
MiTOM
, No.
9
,
1989
, pp.
32
-
36
.
This content is only available via PDF.
All rights reserved. This material may not be reproduced or copied, in whole or in part, in any printed, mechanical, electronic, film, or other distribution and storage media, without the written consent of ASTM International.
You do not currently have access to this content.