Effect of porosity on the reliability of magnetic quality control of the heat treatment of sintered steels

Ulyanov, A.N.; Korobeinikova, V. S.; Sterkhov, G. V.; Sidorov, N. V.

doi:10.1007/bf01156556

Cited by 7 publications

(2 citation statements)

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“…Specimens made of powder steel 50Ni2Mo with a porosity of P & 5 per cent were used as a test material. The specimens were made by double pressing and sintering of mixed powders of iron, graphite ($0.54 mass%), nickel ($2.0 mass%), and molybdenum ($0.3 mass%), with a supplement of zinc stearate, at 1200 Q in a continuous furnace, in a dissociated ammonia atmosphere, within 2 h. Carbon content in the specimens was estimated by the chemical analysis of witness specimens and, indirectly, by a magnetic two-parameter method, by measuring the coercive force of the specimens in view of their porosity [6,7].…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

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Effect of heat treatment on the magnetic behaviour of powder steel 50Ni2Mo under uni-axial tension

Горкунов

Subachev

Задворкин

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this study, investigation results on the effect of heat treatment conditions on the mechanical properties, internal stresses, magnetic characteristics, and electrical resistivity of powder steel 50Ni2Mo are presented. Coercive force and maximum magnetization are shown to be applicable as magnetic test parameters to reveal underheating for quenching. Heating for quenching above the critical point [Formula: see text] up to 910°С has an insignificant effect on the mechanical characteristics of the steel tested. It has been demonstrated that the use of the coercive force measured on minor magnetic hysteresis loops is preferable when estimating the level of applied tensile stresses in heat-treated powder steel 50Ni2Mo.

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Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…Magnetic non-destructive techniques are promising for estimating the level of acting stresses in steel products and structural members under operation [3]. However, there seems to be lack of works on magnetic structuroscopy of heat-treated powder steel products [4][5][6]. The works available deal only with certain aspects of the problem.…”

Section: Introductionmentioning

confidence: 99%