Quench Brittleness of 12%Cr Martensitic Heat-Resistant Steel

Gang Yang; Zheng Dong Liu; Shi Chang Cheng; Mu Xin Yang

doi:10.4028/www.scientific.net/KEM.479.8

Paper Titles

Preface, Sponsors and Organizing Committees

Effects of Surface Active Element on the Biocompatibility of High Nitrogen Stainless Steel
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Quench Brittleness of 12%Cr Martensitic Heat-Resistant Steel
p.8

The Formation and Occurrence of Non-Metallic Inclusions of Si-Doped Steel during Continuous Casting
p.13

Microstructure and Mechanical Properties of Molybdenum Alloy Strengthened by Lanthanum Oxide and Silicon
p.22

AZ80 Mg Alloy Synthesized by Spray Forming and its Extrudability
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Effect of Carbon Migration on Sulfide Stress Corrosion Cracking Behavior of Dissimilar Joints in Wet H₂S Environment
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Microstructures and Mechanical Properties of Dissimilar Metal Weld A508/52M/316L Used in Nuclear Power Plants
p.40

Amorphization Behavior of Ni₅₇Zr₂₀Ti₂₂Ge₁ Powders by Mechanical Alloying
p.48

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Quench Brittleness of 12%Cr Martensitic Heat-Resistant Steel

Abstract:

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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Periodical:

Key Engineering Materials (Volume 479)

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8-12

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.479.8

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Online since:

April 2011

Authors:

Gang Yang, Zheng Dong Liu, Shi Chang Cheng, Mu Xin Yang

Keywords:

12%Cr Martensitic Heat Resistant Steel, Brittleness, Cooling Slowly, Quench

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