Enhancing Mechanical Properties of Ductile Cast Iron Conrods through Different Heat Treatments

This manuscript aims to present an overview of quenching and partitioning (Q&P) heat treatment usually applied to transformation-induced plasticity (TRIP) and duplex steels (DP). TRIP and DP are the first generations of advanced high-strength steels (AHSS). AHSSs present multiphase microstructures that ensure an advantageous combination of strength and ductility. The Q&P heat treatment process aims to obtain a mixed microstructure with martensite and retained austenite and improve the relation strength/ductility of common AHSS. The retained austenite of Q&P steels is rich in carbon and stable at room temperature. The heat treatment process implicates quenching the steel between the martensite-start (Ms) and martensite-finish (Mf) temperatures, followed by partitioning. Partitioning is an isothermal heat treatment that occurs above the Ms temperature. A diffusion process enriches the remaining austenite with carbon that migrates from martensite. The stability of retained austenite at room temperature improves the mechanical performance of steel, once it increases the material’s toughness and elongation. The optimal control of microstructure originates the third generation of AHSS and enables to reduce of weight and improved mechanical response of automotive parts made of the TRIP and DP steels.

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“…Q&P is also applicable for cast irons and martensitic stainless steels. (Nishikawa et al, 2016 andTsuchiyama et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Quenching and partitioning heat treatment: the third generation of advanced high-strength steel

Penha

Marins

2022

RSD

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Wear behavior of a multiphase ductile iron produced by quenching and partitioning process

Dong

Zhou

et al. 2021

Engineering Failure Analysis

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Numerical investigation of the variation of a uniformly dimensioned cast iron property using cooling channels

Towoju

Ishola

2021

Materials Today: Proceedings

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Enhancing Mechanical Properties of Ductile Cast Iron Conrods through Different Heat Treatments

Cited by 4 publications

References 9 publications

Quenching and partitioning heat treatment: the third generation of advanced high-strength steel

Quenching and partitioning heat treatment: the third generation of advanced high-strength steel

Wear behavior of a multiphase ductile iron produced by quenching and partitioning process

Numerical investigation of the variation of a uniformly dimensioned cast iron property using cooling channels

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