Fracture Behavior of Oxide Inclusions during Rolling and Drawing

Kimura, Sei; Hoshikawa, Ikuo; Ibaraki, Nobuhiko; Hattori, Satoshi; Choda, Takashi

doi:10.2355/tetsutohagane1955.88.11_755

Cited by 30 publications

(15 citation statements)

References 10 publications

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“…This is mainly due to their soft plasticity, especially at high temperatures. [8][9][10][11][12] The inclusions which are elongated and fractured along the rolling direction, cause some problems such as anisotropic physical properties or crack formation along the inclusions. [13][14][15] More specifically, Nisitani et al 15) reported that the rate of crack growth in the metal matrix increased with the propagation of this crack along lined inclusions.…”

Section: Introductionmentioning

confidence: 99%

Application of Statistics of Extreme Values for Inclusions in Stainless Steel on Different Stages of Steel Making Process

et al. 2011

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A statistics of extreme values was applied to determine the largest inclusion sizes in the Type 304 stainless steel. The samples taken from a tundish, slab and hot rolled steel in one heat were examined by using a two dimensional observation of inclusions on a metal cross section. It was found that the molten steel sample contained two different types of inclusions, which were deoxidation products (SiO2-CaOMgO-Al2O3) and reoxidation products (SiO2-MnO-Cr2O3). As a result, the extreme value distribution (EVD) for different types of inclusions in the melt has two different slopes. Meanwhile, the inclusions in the slab sample provided a good linearity in one EVD. Moreover, the correlation coefficients of the regression lines for both the slab and rolled steel samples increased significantly with an increased number of measurements from 40 to 80 unit areas. It was found also that the EVD data for fractured inclusions on a parallel cross section of rolled steel agreed satisfactorily well with that for the initial spherical inclusions in the slab sample. Based on the geometrical considerations of inclusion deformation and fracture during hotrolling, the maximum length of fractured inclusions in rolled steel can be estimated reasonably well from the EVD for initial undeformed inclusions in the slab sample.

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Section: Introductionmentioning

confidence: 99%

Application of Statistics of Extreme Values for Inclusions in Stainless Steel on Different Stages of Steel Making Process

et al. 2011

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“…Typical examples of change in shape of oxide inclusions appeared on longitudinal section of steel wire during drawing (Reproduced from ref. ).…”

Section: Evolution Of Inclusions In Cord Steel and Saw Wire Steel Durmentioning

confidence: 97%

“…The fracture behavior of non‐metallic inclusions in tire cord steel during hot rolling and cold wire drawing process have already been studied in 1998 and 2002 (may be earlier). Figure vividly shows the change in shape of oxide inclusions appeared on longitudinal section of steel wire during drawing process . However, previous researchers mainly focused on the change of size, number, morphology and deformability index of inclusions.…”

Section: Evolution Of Inclusions In Cord Steel and Saw Wire Steel Durmentioning

confidence: 99%

State of the Art in the Control of Inclusions in Tire Cord Steels and Saw Wire Steels – A Review

Chen

Zheng

et al. 2019

steel research int.

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Non-metallic inclusions in tire cord steels and saw wire steels often act as breakage source during cold drawing and standing process. In this work, the control of inclusions in tire cord steels and saw wire steels in the production process are extensively reviewed. On the one hand, the new perspectives on the problems left over in the past have been discussed comprehensively, include the new understanding of the origins of SiO 2 -CaO-Al 2 O 3 system inclusions, the new found of evolution of inclusions in cord steel and saw wire steel during rolling and drawing process, and the new understanding of controlling the plasticity of inclusions. On the other hand, the new approaches of controlling inclusions in tire cord steels and saw wire steels have also been discussed, include alkali oxides treatment, boron treatment, Mg treatment and cerium treatment. R 2 O (R ¼ K, Rb, Cs) containing refining slag can significantly improve the cleanliness of saw wire steels and saw wire steels. Adding alkali oxides, boron or Mg into molten steel can dramatically improve the deformability of inclusions through expanding the acreage of the region with low melting points. The basicity of top slag at the range of 1.1-1.2, and ωAl 2 O 3 in top slag around 3 wt% in order to control the composition of inclusions in the region with low melting points when ZrO 2 -based refractory be used to reduced the pure Al 2 O 3 inclusions in tire cord steel. Finally, the unsolved problems are summarized.

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“…Ohshiro et al reported that control of the composition of the inclusions to make them easily deformable during hot rolling was effective in improving the reliability of high fatigue spring steel. 9) Kimura et al investigated the behavior of inclusions during hot rolling and cold drawing, 10) and concluded that the fracture probability of oxide inclusions can be predicted from Young's modulus and mean atomic volume of the oxides that was introduced by them. Shiraiwa et al investigated crystallization behavior for the MnO-Al 2 O 3 -SiO 2 and CaO-MnO-Al 2 O 3 -SiO 2 systems and the deformation behavior of non-metallic inclusions in solid steel.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, numerous efforts have been made to control the composition of the non-metallic inclusions in molten steel [1][2][3][4][5][6] and the morphology of inclusions in solid phase steel. [7][8][9][10][11] The behavior of non-metallic inclusions in solid phase steel has been investigated mainly for Si-killed steel. Ohshiro et al reported that control of the composition of the inclusions to make them easily deformable during hot rolling was effective in improving the reliability of high fatigue spring steel.…”

Section: Introductionmentioning

confidence: 99%

Effect of Li2O Addition on Crystallization Behavior of CaO–Al2O3–MgO Based Inclusions

et al. 2011

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The crystallization behavior of CaO-Al2O3-MgO oxide powder which is one of the major non-metallic inclusions in Al-killed steel was systematically examined in the present study. 33mass%CaO-62mass% Al2O3-5mass%MgO and 30mass%CaO-57mass% Al2O3-5mass%MgO-8mass%Li2O glass powders were heat-treated at 1 073-1 673 K for 8-512 s under air.CaO-Al2O3-MgO glass was found to be crystallized immediately after the heat treatments. Moreover, it was revealed that the addition of Li2O accelerated the crystallization of the glass powders, and controlled aggregation of crystal particles. Additionally, the indentation hardness of crystallized glasses after 512 s heat-treatments was investigated by using a nano-indenter. The addition of Li2O had the effect of lowering the hardness of samples, which indicates that Li2O would improve the deformation behavior of aluminate based inclusions.

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Fracture Behavior of Oxide Inclusions during Rolling and Drawing

Cited by 30 publications

References 10 publications

Application of Statistics of Extreme Values for Inclusions in Stainless Steel on Different Stages of Steel Making Process

Application of Statistics of Extreme Values for Inclusions in Stainless Steel on Different Stages of Steel Making Process

State of the Art in the Control of Inclusions in Tire Cord Steels and Saw Wire Steels – A Review

Effect of Li2O Addition on Crystallization Behavior of CaO–Al2O3–MgO Based Inclusions

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