Influence of initial microstructure on the microstructure evolution and mechanical properties of 1.0C-1.5Cr steel in the laser surface quenching

Liu, Zhenxing; Tong, Bing-qian; Zhang, Qunli; Yao, Jianhua; Коваленко, В. С.; Li, Zhuguo

doi:10.1016/j.msea.2020.139490

Cited by 11 publications

(12 citation statements)

References 32 publications

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“…With the decrease in the amount of undissolved cementite particles, the dissolution degree of cementite increases, which results in the increase in content of alloy elements in solution of matrix microstructure, which decreases the formation temperature of the liquid phase. [ 20 ]…”

Section: Discussionmentioning

confidence: 99%

“…The DICTRA simulation result indicated that when the heating rate increased from 10 to 5000 °C s −1 , the formation temperature of the liquid phase decreased from 1339 to 1250 °C. [ 20 ] Without preheating, the simulated peak temperature at the depth of 125 μm is 1238 °C (Figure 11d). In other words, micromelting may also occur at the depth of ≈125 μm.…”

Section: Discussionmentioning

confidence: 99%

“…The schematic illustration of the relative position of specimen and pendulum of impact tester can be found in our previous work. [ 20 ]…”

Section: Methodsmentioning

confidence: 99%

“…Our previous work indicated that the impact absorbed energy of 52100 steel decreased after laser surface hardening. [ 20,21 ] Sometimes the impact loads may lead to the premature failure. Therefore, the impact property after laser surface hardening should be considered.…”

Section: Introductionmentioning

confidence: 99%

“…Our early preliminary work indicated that preheating was beneficial to the impact property during laser surface treatment. [ 20 ] However, the impact fracture mechanism and microstructure difference are still needed to be further clarified. In addition, to achieve the best combination of toughness and hardness during laser surface treatment, it is important to further study the influence of preheating on the microstructure and impact fracture behavior of 52100 steel.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Preheating on the Microstructure, Impact Properties, and Fracture Mechanisms of a Laser Surface‐Hardened High‐Carbon–Chromium Steel

Yao

et al. 2021

steel research int.

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To optimize the toughness and hardness of laser surface‐hardened high‐carbon–chromium (52100) steel, the effect of preheating on microstructure evolution and impact property is studied, and the impact fracture mechanism is analyzed. The results indicate that preheating deepens the hardened depth, facilitating grain coarsening and cementite dissolution near the surface. Regardless of preheating, the size distribution of cementite follows a typical lognormal distribution. Laser surface hardening leads to a decrease in impact absorbed energy. Preheating at 160 °C increases the impact absorbed energy by ≈25%, at which point the maximum hardness is still as high as 860 HV0.3. The impact absorbed energy of spheroidized microstructure tends to be larger before laser hardening and reduces after laser hardening. The impact toughness is the combined result of the brittleness of the hardened layer, residual stress, and substrate microstructure. Under the impact load, microcracks nucleate near the surface of the hardened layer and propagate in the form of intergranular fracture and then propagate in the form of transgranular fracture toward the inside of the hardening layer and substrate. Herein, a novelty research work on optimizing the impact properties during laser hardening through preheating and adjusting initial microstructure is provided.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…The schematic illustration of the relative position of specimen and pendulum of impact tester can be found in our previous work. [ 20 ]…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%