Evolution of Carbide Precipitates in 1.25Cr-0.5Mo Steel During Simulated Postweld Heat Treatment

Shen, Yun‐Hwei; Matsuura, Hiroyuki

doi:10.1007/s11661-018-4806-x

Cited by 11 publications

(1 citation statement)

References 31 publications

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“…The behavior of alloy steels following carbide transformation during tempering has been widely studied, and has been reported for transformations such as M 3 C to MC [8], M 3 C to M 2 C [9,10], M 3 C to M 7 C 3 [11][12][13], M 3 C to M 23 C 6 [14,15], M 7 C 3 to M 23 C 6 [16,17], M 7 C 3 to M 6 C [18], MC to M 2 C [19], M 2 C to M 6 C [20] and M 23 C 6 to M 6 C [21]. Tsai and Yang [11] observed the transformation of M 3 C to M 7 C 3 in the martensitic region, resulting from the 'in situ nucleation' mechanism.…”

Section: Introductionmentioning

confidence: 99%

Carbide transformation behaviors of a Cr–Mo–V secondary hardening steel during over-ageing

Wang

et al. 2020

Mater. Res. Express

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The transformation of carbides in a 1.9Cr-1.4Mo-0.3 V secondary hardening steel that was subjected to over-ageing at 600°C-700°C has been investigated. The carbides were characterized using scanning electron microscope (SEM), x-ray diffraction (XRD), inductively coupled plasma-atomic emission spectrometry (ICP-AES), and transmission electron microscopy (TEM) preformed on carbon replicas. The results indicate that MC, M 2 C, and M 3 C were formed during over-ageing from 600 to 700°C, whereas M 7 C 3 , and M 23 C 6 started to be formed at 650 and 700°C, respectively. In addition, the co-existence of hexagonal and orthorhombic M 7 C 3 structures in a carbide particle was firstly observed. M 3 C was transformed to other carbides, and the formation of both M 2 C and M 23 C 6 may follow the 'separate nucleation' mechanism, whereas M 7 C 3 was transformed from M 3 C via the 'in situ nucleation' mechanism. The crystallographic orientation relationships between the in situ transformed M 7 C 3 and M 3

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