The effect of fine nonmetallic inclusions on the mechanical properties and recrystallization of sintered metals

1964 ◽  
Vol 2 (1) ◽  
pp. 39-43
Author(s):  
Yu. N. Semenov
Keyword(s):  
Mechanical Properties ◽  
Nonmetallic Inclusions

scholarly journals Effect of Filter Functional Coating on Detrimental Nonmetallic Inclusions in 42CrMo4 Steel and Its Resulting Mechanical Properties

2019 ◽  
Vol 22 (2) ◽  
pp. 1900540
Author(s):  
Mikhail Seleznev ◽  
Sebastian Henschel ◽  
Enrico Storti ◽  
Christos G. Aneziris ◽  
Lutz Krüger ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Nonmetallic Inclusions ◽  
Functional Coating ◽  
42Crmo4 Steel

Mechanical properties and the nature of nonmetallic inclusions in structural steel containing rare earth elements

1963 ◽  
Vol 5 (8) ◽  
pp. 432-439
Author(s):  
Yu. V. Kryakovskii ◽  
Yu. I. Rybenchik ◽  
E. I. Tyurin ◽  
V. I. Yavoiskii
Keyword(s):  
Mechanical Properties ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Structural Steel ◽  
Nonmetallic Inclusions

Effect of Boron on the Microstructure and Mechanical Properties of Low-Carbon Tube Steel

2019 ◽  
Vol 946 ◽  
pp. 374-379 ◽  
Author(s):  
Anatoly A. Babenko ◽  
Vladimir I. Zhuchkov ◽  
Natalia I. Selmenskih
Keyword(s):  
Mechanical Properties ◽  
Nonmetallic Inclusions ◽  
Pipe Steel ◽  
Steel Sample ◽  
Tube Steel ◽  
Low Carbon ◽  
Rolled Metal ◽  
Carbon Tube ◽  
Additional Thermal Treatment ◽  
Average Size

Effects of boron in low-carbon tube steel grade 17G1SU on nonmetallic inclusions, structure and mechanical properties were investigated. Experimental samples of rolled metal containing boron 0.006 and 0.011% are characterized by predominantly small, nonmetallic inclusions not more than 5 μm, which are represented by complex alumomagnesium spinels in the shell of manganese and calcium sulfides, and small silicate inclusions. Nonmetallic inclusions of comparative pipe steel sample, containing no boron characterized by the presence of larger inclusions presented complex oxysulfide and sulfide films. The main structural component of the comparative and experimental samples is ferrite. The introduction of boron is contributed by a decrease in the average size of ferritic grains from 8.7 μm (0% B) to 6.2 (0.006% B). Increasing the boron content to 0.011% leads to slight increase (up to 6.8 microns) of the size. The mechanical properties of 10 μm rolled metal pipe steel ensured the production of rolled products of strength class X80 without additional (thermal) treatment, as a result of the reduction in the size and shape of nonmetallic inclusions, and formation of dispersed structure.

scholarly journals The study of the microstructure and mechanical properties of low carbon steel, microalloying by boron

2019 ◽  
Vol 57 (1) ◽  
pp. 143-148
Author(s):  
Anatoly A. Babenko ◽  
◽  
Natalia I. Selmensky ◽  
Alena G. Upolovnikova ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Steel ◽  
Nonmetallic Inclusions ◽  
Volume Fraction ◽  
Low Carbon Steel ◽  
Strength Properties ◽  
Rolled Steel ◽  
Low Carbon ◽  
Bainite Structure ◽  
Temporary Resistance

The paper presents the results of the study of non-metallic inclusions, the structure and mechanical properties of low carbon steel, microalloying by boron. The study of the amount and composition of nonmetallic inclusions showed that with the introduction of boron the volume fraction of oxide and oxysulfide inclusions increases and the volume fraction of sulfide inclusions significantly decreases. At the same time, the alloying of steel with boron increases to 99.7% the proportion of inclusions with a size of no more than 5 microns against 80.6% in the metal without boron. In the metal with boron, nonmetallic inclusions larger than 10 μm are absent, while in the metal without boron their share is 13.6%. Studies have shown that in a metal containing 0.011% boron, independent boron-containing inclusions were not detected. Boron was not detected in the composition of the studied nonmetallic inclusions. In all samples, steel nonmetallic inclusions are represented mainly by oxide, oxysulfide and sulfide inclusions. In the boron-free steel, a small amount of perlite is present along with the ferritic phase. Steel microalloying by boron is accompanied by the formation of a dispersed ferrite-bainite structure, which consists of fine-grained ferrite with bainite sites with a tendency to form bainite strips along the rolling direction. The microhardness of ferrite and perlite in steel without boron does not exceed an average of 180 and 214 HV10, respectively. It is noted that the presence of boron in steel in an amount of 0.011% increases the microhardness of ferrite to 260 HV10 and bainite to 335 HV10. The mechanical properties of hot-rolled steel with a thickness of 10 mm from boron-containing low-alloyed steel, due to the predominant formation of small rounded inclusions with a size of no more than 5 microns and the formation of a fine ferrite-bainite structure, are characterized by enhanced strength properties with preservation of plastic characteristics. The absolute values of the yield strength and temporary resistance of steel with boron reach 575 and 650 MPa, respectively. With such strength properties of metal, high plastic characteristics are preserved. Rolled steel without boron is characterized by reduced to 540 and 610 MPa tensile strength and temporary resistance, respectively.

Influential Microstructural Features

Carburizing ◽  
1999 ◽  
pp. 99-133
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Nonmetallic Inclusions ◽  
Hardened Steels ◽  
And Behaviors

Abstract This chapter is a study of the microstructure of case-hardened steels. It explains what can be learned by examining grain size, microcracking, nonmetallic inclusions, and the effects of microsegregation. It identifies information-rich features, describing their ideal characteristics, the likely cause of variations observed, and their effect on mechanical properties and behaviors. The discussions throughout the chapter are aided by the use of images, diagrams, data plots, and tables.

The Influence and Control of Porosity and Inclusions in Aluminum Castings

2004 ◽  
pp. 47-54
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloys ◽  
Nonmetallic Inclusions ◽  
Liquid Solution ◽  
Combined Effects ◽  
Porosity Formation ◽  
Aluminum Castings ◽  
And Control

Abstract Porosity in aluminum is caused by the precipitation of hydrogen from liquid solution or by shrinkage during solidification, and more usually by a combination of these effects. Nonmetallic inclusions entrained before solidification influence porosity formation and mechanical properties. This chapter describes the causes and control of porosity and inclusions in aluminum castings as well as the combined effects of hydrogen, shrinkage, and inclusions on the properties of aluminum alloys. In addition, it discusses the applications of radiography to reveal internal discontinuities in aluminum.

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