Heat treatment of structural steels to reduce temper brittleness

1983 ◽  
Vol 25 (5) ◽  
pp. 361-362
Author(s):  
M. M. Fetisova ◽  
T. P. Kovrova ◽  
�. I. Pleshakov
Keyword(s):  
Heat Treatment ◽  
Structural Steels ◽  
Temper Brittleness

INFLUENCE OF TIME-TEMPERATURE PARAMETERS OF LONG-DURATION EXPOSURE ON TRANSFORMATIONS IN STRUCTURAL STEELS (review)

2021 ◽  
pp. 15-23
Author(s):  
E.A. Eliseev ◽  
◽  
G.S. Sevalnev ◽  
A.V. Doroshenko ◽  
M.E. Druzhinina ◽  
...  
Keyword(s):  
Low Temperature ◽  
Chemical Elements ◽  
Structural Steels ◽  
Holding Time ◽  
Temper Brittleness ◽  
Brittleness Temperature ◽  
Temperature Range ◽  
Long Duration ◽  
Reversible Temper ◽  
Reversible Temper Brittleness

Low-temperature nitriding of steels is usually carried out in the temperature range of development of reversible temper brittleness. The holding time at these temperatures significantly exceeds the holding time during normal tempering, which can negatively affect the properties of steel. The article considers theories that explain the processes occurring in steels in the temper brittleness temperature range. It may be concluded that views linking the embrittlement of steel with alloying elements such as nickel in its content are not confirmed by the experiments; at the same time ideas based on classical views about the diffusion of chemical elements explain the processes in steel better.

Heat treatment of alloyed structural steels to improve their cold deformability

1986 ◽  
Vol 28 (1) ◽  
pp. 37-42
Author(s):  
V. A. Belov ◽  
V. A. Golovin ◽  
A. M. Sokolov
Keyword(s):  
Heat Treatment ◽  
Structural Steels

Temper brittleness of complex alloy structural steels

1977 ◽  
Vol 19 (4) ◽  
pp. 269-272 ◽  
Author(s):  
G. M. Petrov ◽  
V. V. Tsukanov
Keyword(s):  
Structural Steels ◽  
Temper Brittleness ◽  
Complex Alloy

scholarly journals FORMATION OF NANOCRYSTAL STATE IN DETAILS OF CARBON STRUCURAL STEELS

2018 ◽  
pp. 113-118
Author(s):  
A. A. Andrushevich ◽  
G. I. Aniskovich ◽  
P L. Kantor ◽  
D. V. Kuchuk
Keyword(s):  
Experimental Data ◽  
Heat Treatment ◽  
Mechanical Characteristics ◽  
Structural Steels ◽  
Carbon Steels ◽  
Agricultural Machinery ◽  
Working Bodies

The conditions of formation of the nanocrystal state of the structure in carbon steels are considered in the article. The methods of research and experimental data on the microstructural structure of the strengthened parts of the working bodies of agricultural machinery made from carbon steels of the lowered hardenability are given. It is shown that pulsed quenching and low tempering provides of steel products with fragmented nanocrystal structure of the martensite. Fragmentation of martensite grains in carbon structural steels during heat treatment of parts significantly increases their mechanical characteristics.

scholarly journals Machine Structural Steels. The Effect of Shot Peening and Heat Treatment on the Contact Rolling Fatigue Life.

DENKI-SEIKO ◽  
1994 ◽  
Vol 65 (1) ◽  
pp. 41-49
Author(s):  
Tatsumi Urita ◽  
Sadayuki Nakamura ◽  
Yoshio Okada ◽  
Makoto Yoshida
Keyword(s):  
Heat Treatment ◽  
Fatigue Life ◽  
Shot Peening ◽  
Structural Steels

Research on Heat Treatment Influence Factors on High-Pressure Cylinder Steel 30CrMo-M

2010 ◽  
Vol 97-101 ◽  
pp. 771-776 ◽  
Author(s):  
Zhong Guo Huang ◽  
Hong Lei Dong ◽  
Qing Hua Yuan ◽  
Shun Yao Jin ◽  
Jia Fan ◽  
...  
Keyword(s):  
Heat Treatment ◽  
High Pressure ◽  
Chemical Composition ◽  
Wall Structure ◽  
Carbon Equivalent ◽  
Temper Brittleness ◽  
High Pressure Cylinder ◽  
Treatment Technology ◽  
Tempering Temperature ◽  
Pressure Cylinder

To increase comprehensive properties of cylinder steel, high-pressure cylinder steel 30CrMo-M was developed on the basis of steel 30CrMo. Tests and researches were made on factors which influence heat treatment properties, such as chemical composition, quenching temperature, and tempering temperature. The results indicated that the 30CrMo-M steel has stable chemical composition, its strength rises with increase of carbon equivalent, and thus it has better relativity. When concentration of quenching liquid is 5%, yield ratio of the steel can be guaranteed to be low, thus safety of cylinder is improved. Tempered between 570°C~622°C, the strength of the steel is increased and plasticity rises with increase of temperature. When tempered at 570°C, inner wall structure of cylinder contains tempering martensite, the strength is high but the plasticity is low. When tempered between 610°C~615°C, temper brittleness happens very easily and toughness is on the low side. The best heat treatment technology is: quenched at 930°C with temperature holding for 40 minutes and quenching liquid concentration as 5%, tempered at 580°C with temperature kept for 90 minutes. The microstructure treated by this technology is tempered sorbite with higher strength, plasticity and toughness.

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