The Mechanism of Temper Brittleness

2009 ◽  
pp. 3-3-17
Keyword(s):  
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.

scholarly journals TEMPER-BRITTLENESS OF THE MEDIUM-C LOW Mn-Cr STEELS

1953 ◽  
Vol 39 (12) ◽  
pp. 1323-1330
Author(s):  
Z. Takao ◽  
K. Takahashi ◽  
M. Nishihara ◽  
Y. Tanifuji
Keyword(s):  
Temper Brittleness ◽  
Cr Steels

Reasons for the suppression of temper brittleness in steels with rapid electric tempering

1994 ◽  
Vol 36 (2) ◽  
pp. 84-87 ◽  
Author(s):  
Yu. Ya. Meshkov ◽  
I. S. Statsenko ◽  
V. D. Bezbakh
Keyword(s):  
Temper Brittleness

Quench Brittleness of 12%Cr Martensitic Heat-Resistant Steel

2011 ◽  
Vol 479 ◽  
pp. 8-12 ◽  
Author(s):  
Gang Yang ◽  
Zheng Dong Liu ◽  
Shi Chang Cheng ◽  
Mu Xin Yang
Keyword(s):  
Impact Toughness ◽  
Cooling Rate ◽  
Microstructural Characterization ◽  
Temper Brittleness ◽  
Resistant Steel ◽  
Slow Cooling ◽  
Continuous Precipitation ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
The Impact

The mechanism of brittleness due to slow cooling during quenching was experimentally investigated in 12% Cr martensitic heat resistant steel. The mechanical property tests and microstructural characterization by SEM、TEM and XRD were conducted. The results showed the impact toughness would decrease with the slowing of cooling rate during quenching, and the low cooling rate within the temperature range from 820 to 660 °C played a significant effect on the impact toughness . Different from the mechanism of temper brittleness, the main causes of embrittlement due to the slow cooling upon quenching were both the continuous precipitation of M23C6 along prior austenite grain boundaries during the process of slow cooling and that of M2C along prior residual austenite film during tempering, and this kind of quench brittleness was nonreversal.

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