Microstructure–Property Correlation in Low-Si Steel Processed Through Quenching and Nonisothermal Partitioning

Bansal, G K and Rajinikanth, V and Ghosh, C and Srivastava, V C and Kundu, S and Chowdhury, S G (2018) Microstructure–Property Correlation in Low-Si Steel Processed Through Quenching and Nonisothermal Partitioning. Metallurgical and Materials Transactions A, 49(8) (IF-1.985). pp. 3501-3514.

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Abstract

In the present investigation, an attempt has been made to stabilize austenite by carbon partitioning through quenching and nonisothermal partitioning (Q&P) technique. This will eliminate the need for additional heat-treatment facility to perform isothermal partitioning or tempering process. The presence of retained austenite in the microstructure helps in increasing the toughness, which in turn is expected to improve the abrasion resistance of steels. The carbon partitioning from different quench temperatures has been performed on two different alloys, with low-Si content (0.5 wt pct), in a salt bath furnace atmosphere, the cooling profile of which closely resembles the industrially produced hot-rolled coil cooling. The results show that the stabilization of retained austenite is possible and gives rise to increased work hardening, better impact toughness and abrasive wear loss comparable to that of a fully martensitic microstructure. In contrast, tempered martensite exhibits better wear properties at the expense of impact toughness.

Item Type:Article
Official URL/DOI:https://doi.org/10.1007/s11661-018-4677-1
Uncontrolled Keywords:Q-And-P; Mechanical-Properties; Retained Austenite; Tempering Process; Mediumcarbon; Evolution; Transformation; Precipitation; Martensite; Toughness
Divisions:Material Science and Technology
ID Code:7881
Deposited By:Sahu A K
Deposited On:20 Sep 2019 10:08
Last Modified:20 Sep 2019 10:08
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