Effect of tempering at subcritical temperatures on the fracture strength of medium carbon structural steel

1992 ◽  
Vol 34 (8) ◽  
pp. 500-504 ◽  
Author(s):  
A. P. Gulyaev ◽  
V. N. Zikeev ◽  
Yu. V. Kornyushchenkova ◽  
S. V. Zemskii
Keyword(s):  
Structural Steel ◽  
Fracture Strength ◽  
Medium Carbon ◽  
Carbon Structural Steel

Welding of medium-carbon structural steel

2015 ◽  
Vol 30 (1) ◽  
pp. 60-64
Author(s):  
V.I. Lukin ◽  
V.G. Kovalchuk ◽  
N.G. Pokrovskaya ◽  
E.V. Golev ◽  
O.A. Bannykh ◽  
...  
Keyword(s):  
Structural Steel ◽  
Medium Carbon ◽  
Carbon Structural Steel

scholarly journals Calculation of the multi-blade rotary-friction tool's cutting cupped cutter to strength in the Ansys WB surrounding

2020 ◽  
Vol 18 (4) ◽  
pp. 643-648
Author(s):  
Asset Rakishev ◽  
Almat Sagitov ◽  
Bakytzhan Donenbaev ◽  
Karibek Sherov ◽  
Sayagul Tussupova ◽  
...  
Keyword(s):  
Structural Steel ◽  
Cutting Force ◽  
Cutting Conditions ◽  
Steel R6m5 ◽  
Medium Carbon ◽  
Maximum Value ◽  
Cutting Force Components ◽  
Carbon Structural Steel ◽  
Force Components

The authors developed the design of a special multi-blade rotary-friction tool. The multi-blade rotary-friction tool is equipped with two cupped cutters - heating and cutting. The heating cupped cutter is made of medium-carbon structural steel of any brand, and the cutting cupped cutter is made of steel R6M5. The final formation of the treated surface and its quality is provided by the cutting cupped cutter. This article presents the results of the calculation of the strength of the cutting cupped cutter multi-blade rotary friction tool.As a result, the following were established: when processing steels 30HGSA cutting force components reach the maximum value than when processing materials 40HN2MA, St.45, and St.3c (calm); strength and rigidity of the cutting cupped cutter is sufficient for processing optimal cutting conditions: nsp = 1000 rpm; S = 0.42 mm/rot; t = 1.0 mm.

scholarly journals Study on MnS Inclusion Aggregation along Continuous Casting Slab Thickness of Medium Carbon Structural Steel

Metals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 56
Author(s):  
Qiuyang Yu ◽  
Xiaogang Yang ◽  
Chaobin Lai ◽  
Zhifang Tong
Keyword(s):  
Continuous Casting ◽  
Structural Steel ◽  
Sulfur Content ◽  
Average Diameter ◽  
Area Fraction ◽  
Slab Thickness ◽  
Medium Carbon ◽  
Mixed Zone ◽  
Continuous Casting Slab ◽  
Carbon Structural Steel

Precipitation of MnS inclusions in steel affects the mechanical properties of the material significantly. The evolution of MnS inclusions along the continuous casting slab thickness and its influencing factors has not been clearly established and comprehensively studied. In this paper, solidification macrostructure, sulfur segregation and MnS inclusions in the continuous casting slab of medium carbon structural steel 45# were studied by various methods, including the metallographic observations, elemental analysis, scanning electron microscope (SEM) with Energy Dispersive Spectrometer (EDS) observation, automatic particle analysis, and thermodynamic calculations. The 2D/3D morphologies of MnS inclusions suggest that the sulfides turn from globular to rodlike, and further to dendritic shape along the slab thickness progressively. Furthermore, it was found that MnS inclusions are remarkably aggregated in the columnar crystals and the equiaxed crystals mixed zone, where the sulfides have the largest average diameter of 6.35 μm and the second maximum area fraction of 0.025% along the slab thickness. In order to reveal the mechanism of this phenomenon, the precipitation temperature of MnS inclusion in the 45# steel was clarified by thermodynamic calculation and experimental observation, and the quantitative relationships among the distribution of sulfur content, secondary dendrite arm spacing (SDAS), and precipitation area fraction of MnS inclusions were discussed. Moreover, the inclusion size was numerically predicted to compare with the measured value. The results indicate that the large SDAS, high sulfur content and low cooling rate accounting for the large-size aggregated MnS inclusions in the mixed zone. Unfortunately, the dendritic MnS inclusions, even if the average diameter exceeds 52 μm, can act as the nucleation sites for ferrites, and the distribution of the sulfides promotes uneven microstructure in the steel.

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