Comparative Study on the Microstructure Characteristics and Enhanced Mechanical Properties of Spray Formed GCr15 Bearing Steel

Liu, Mingxiang; Cui, Zhenshan; Shang, Xiaoqing; Zhou, Shan Shan

doi:10.1002/srin.201700529

Cited by 4 publications

(3 citation statements)

References 28 publications

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“…The researches show that proper heat treatment can optimize the microstructure of GCr15 and improve the strengthening effect of surface treatment on the surface properties of GCr15 [25][26][27][28][29]. Hao Su et al [30] investigated the surface ultrasonic burnishing treatment of TC11 titanium alloy and found that the heating surface of TC11 titanium alloy has better ultrasonic burnishing treatment results, significantly higher corrosion resistance, lower surface roughness.…”

Section: Introductionmentioning

confidence: 99%

Effect of ultrasonic rolling on the surface integrity and corrosion properties of GCr15 steel before and after quenching

Lin¹,

Wang²,

Fu³

2022

Mater. Res. Express

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Two new surface strengthening processes,Ultrasonic rolling treatment before and after quenching were investigated on GCr15 steel. The surface integrity and corrosion were tested and ABAQUS simulation was conducted for the two processes. As a result, the proposed process is to carry out ultrasonic rolling on the GCr15 after quenching by the small static loads and rolling times.In comparision with the unquenched sample, the quenched sample is more prone to dislocation and slip, resulting in better grain refinement effect. When the static loads and rolling times are small, ultrasonic rolling has a good peak-cutting and valley-filling effect on the quenched sample surface, which leads to the roughness of the quenched samples less than that of the unquenched samples. The initial residual compressive stress in the quenched sample due to heat treatment is greater and deeper than that of the unquenched sample due to large plastic deformation under small static loads or rolling times. The hardness of the unquenched samples is much lower than that of the quenched samples, owing to better grain refinement effect in quenched samples. The corrosion resistance of quenched samples is better than that of unquenched samples.

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Section: Introductionmentioning

confidence: 99%

Effect of ultrasonic rolling on the surface integrity and corrosion properties of GCr15 steel before and after quenching

Lin¹,

Wang²,

Fu³

2022

Mater. Res. Express

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“…Carbide distribution in hot-rolled rod reveals in the form of network and banded carbides, which are respectively precipitated proeutectoid carbide with band and reticulation form along austenite grain boundary with GCr15 hypereutectoid steel during the cooling process after rolling [12]. For GCr15 bearing steel, carbon segregation usually occurs in bloom continuous casting due to high carbon-chromium contents and long solidification time, which is the fundamental cause of forming carbide network and band during subsequent hot working process [13]. Hence, it is of vital importance in the improvement of carbide distribution in hot-rolled rod by improving carbon segregation of as-cast bearing steel.…”

Section: Introductionmentioning

confidence: 99%

“…Figure13. Variation of the measured values of average SDAS from surface to centre in cross-section of bloom for case1, case 2 and case 3.…”

mentioning

confidence: 99%

Improvement of centre segregation in continuous casting bloom and the resulting carbide homogeneity in bearing steel GCr15

Bao

Wang

et al. 2019

Ironmaking & Steelmaking

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In the present work, solidification structure and centre segregation in continuously cast bearing steel GCr15 blooms with 220mm×260 mm were obtained by different casting conditions (M-EMS, M + F-EMS, M + F-EMS + MSR), which were systematically optimized by numerical simulation and experiments. The relationship between centre segregation in continuously cast GCr15 bloom, heredity in hot-rolled steel and carbide inhomogeneity of hot-rolled steel with was investigated comprehensively. Results showed that compared with M-EMS, centre carbon segregation ratio in the bloom decreased from 1.1∼1.4 to 1.04∼1.22 by M + F-EMS, and could be reduced to 0.96∼1.08 by MSR in combination with M + F-EMS. Moreover, centre segregation in hot-rolled steel decreased with the decrease of centre segregation in bloom. Grade of network and banded carbide in hotrolled steel decreased accordingly, especially for centre carbon segregation ratio with 0.96∼1.08, grade of network and banded carbide could be significantly reduced to 1. It was important to control centre segregation in as-cast steel to improve the resulting carbide homogeneity of asrolled steel. According to the experimental results, higher casting speed in bloom with M + F-EMS and MSR integrated process was preferred to effectively reduce centre segregation ratio and further decreased the occurrence of network and banded carbide in as-rolled bearing steel GC15.

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Microstructure and porosity formation of spray-formed GCr15 steel billets

Liu

Cui

Sui

2018

Procedia Manufacturing

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Comparative Study on the Microstructure Characteristics and Enhanced Mechanical Properties of Spray Formed GCr15 Bearing Steel

Cited by 4 publications

References 28 publications

Effect of ultrasonic rolling on the surface integrity and corrosion properties of GCr15 steel before and after quenching

Effect of ultrasonic rolling on the surface integrity and corrosion properties of GCr15 steel before and after quenching

Improvement of centre segregation in continuous casting bloom and the resulting carbide homogeneity in bearing steel GCr15

Microstructure and porosity formation of spray-formed GCr15 steel billets

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