The growth behavior of austenite grain in the heating process of 300M steel

Zhang, S.S.; Li, M.Q.; Liu, Yingang; Luo, Jiao; Liu, T.Q.

doi:10.1016/j.msea.2011.02.089

Cited by 114 publications

(38 citation statements)

References 12 publications

(11 reference statements)

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“…Their results indicate that austenite grains grow by boundary movement and are affected by secondary precipitates [2]. Austenite grains grow quickly at high temperatures and become large with the increase in peak temperature [16].…”

Section: Austenite Grain Growth Behavior At High Temperaturesmentioning

confidence: 99%

In situ observation of austenite grain growth behavior in the simulated coarse-grained heat-affected zone of Ti-microalloyed steels

Wan

Huang

et al. 2014

Int J Miner Metall Mater

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Abstract:The austenite grain growth behavior in a simulated coarse-grained heat-affected zone during thermal cycling was investigated via in situ observation. Austenite grains nucleated at ferrite grain boundaries and then grew in different directions through movement of grain boundaries into the ferrite phase. Subsequently, the adjacent austenite grains impinged against each other during the α→γ transformation. After the α→γ transformation, austenite grains coarsened via the coalescence of small grains and via boundary migration between grains. The growth process of austenite grains was a continuous process during heating, isothermal holding, and cooling in simulated thermal cycling. Abundant finely dispersed nanoscale TiN particles in a steel specimen containing 0.012wt% Ti effectively retarded the grain boundary migration, which resulted in refined austenite grains. When the Ti concentration in the steel was increased, the number of TiN particles decreased and their size coarsened. The big particles were not effective in pinning the austenite grain boundary movement and resulted in coarse austenite grains.

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Section: Austenite Grain Growth Behavior At High Temperaturesmentioning

confidence: 99%

In situ observation of austenite grain growth behavior in the simulated coarse-grained heat-affected zone of Ti-microalloyed steels

Wan

Huang

et al. 2014

Int J Miner Metall Mater

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“…On the other hand, the PAG size of high C zones increases sharply at 780 o C. After that a monotonous increase of grain size is not observed, but the PAG size even decreases slightly in a range from 123.7 to 73.9 μm. That behavior, which is different from the grain growth in ordinary steel [11,[13][14][15], is probably due to the variation of C content in the fine-grained matrix or coarse pearlite islands from one specimen to another. Nevertheless, when heating temperature is equal or higher 780 o C the abnormally coarse austenite grains, which probably formed from coarse pearlite islands, are observed.…”

Section: Effect Of Heating Temperaturementioning

confidence: 78%

“…It is well known that the austenite grain in carbon and low-alloy steels grows with increase of heating temperature [13][14]. Moreover, the initial microstructure, which mainly determined by C content, also has strong effect on the development of PAM in C steel during heating [11,[15][16][17].…”

Section: Resultsmentioning

confidence: 99%

A novel approach to study the effect of heating temperature on prior-austenite microstructure of a Japanese sword

Pham

Ohba

Morito

et al. 2015

MATEC Web of Conferences

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Abstract. There is uncertainty about heating temperature of final heat treatment and its effect on microstructure of Japanese sword, since the temperature is controlled entirely by experiences and skills of the swordsmith. This study proposed a novel approach to clarify how heating temperature affects prior-austenite microstructure of a Japanese sword. A fragment of the sword was normalized at 800 o C to recover its initial microstructure. Specimens were cut and quenched, after being reheated at temperatures from 740 to 860 o C with increment step of 20 o C. Their prior-austenite microstructure was reconstructed from martensite by using our newly developed automatic reconstruction method. In normalized microstructure of the sword, coarse pearlite islands of 0.70-0.76 mass% C steel were found within a fine ferrite-pearlite matrix of 0.52-0.56 mass% C steel. The prior-austenite grains of the medium C matrix remained fine (11.6 -15.1 μm) over the temperature range, while abnormal coarse grains (73.9 -123.7 μm) developed from high C islands in the specimens reheated above 780 o C. The prior-austenite microstructure of the original sword was closely similar to that of the specimen reheated at 760 o C. It was able to estimate the heating temperature of the original sword to be approximately 760 ± 10 o C.

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“…Some researchers investigated the austenite grain growth behavior and they found that heating temperature, holding time are the main affecting factor on the austenite grain growth behavior [6][7]. Pous-Romero developed a model to show the evolution of the austenite grain structure in nuclear pressure vessel steel [8].…”

Section: Introductionmentioning

confidence: 99%

The Austenite Grain Growth Behavior and Mathematical Model of 20CrMnTiH

Wang¹,

Feng²,

Guan³

et al. 2016

Proceedings of the 2nd Annual International Conference on Advanced Material Engineering (AME 2016)

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Abstract. The 20CrMnTiH gear steel was heated at temperature range from 850°C to 1250°C and at holding time range from 0s to 480s to obtain the law of austenite grain growth by using Gleeble-3500 thermo-simulation-machine in this research. The effects of heating temperature and holding time on austenite grain growth behavior were investigated. The results show that austenite grain size increased with the increase of heating temperature and the extension of holding time. By introducing the Sellars model, the austenite grain growth model was developed based on the analysis of experiment data. According to the comparison of calculated values with experiment values, the calculated results are in good agreement with the experimental results.

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The growth behavior of austenite grain in the heating process of 300M steel

Cited by 114 publications

References 12 publications

In situ observation of austenite grain growth behavior in the simulated coarse-grained heat-affected zone of Ti-microalloyed steels

In situ observation of austenite grain growth behavior in the simulated coarse-grained heat-affected zone of Ti-microalloyed steels

A novel approach to study the effect of heating temperature on prior-austenite microstructure of a Japanese sword

The Austenite Grain Growth Behavior and Mathematical Model of 20CrMnTiH

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