Heat resistance of machine parts of metallurgical equipment

Tylkin, M. A.

doi:10.1007/bf00660171

Cited by 1 publication

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“…-knowing the material grade and using the data of the TTT-diagram for appropriate steels, to determine the critical rate (Expression 1) of cooling (hardening) required for the austenite supercooling up to its martensite transformation according to the expression [10]:…”

Section: Experiments and Resultsmentioning

confidence: 99%

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Surface Hardening of Parts Arc

Korolkova

Mashrabov²

2016

MSF

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The paper presents the results of studies aimed at justifying and developing the ways and means of cylindrical parts made of hardenable alloys surface hardening by heating of the electric arc between the inert electrode and the element. The shapes of electrode sharpening and the position of the electrode relative to the element are substantiated. The sequence of surface hardening operations is revealed and the critical rate of cooling is determined and its value is proved with numerical experiments. It was necessary to develop a program for calculating temperature fields in details, with a difference-differential scheme obtained from a combination of explicit and implicit schemes being developed for the first time. A number of investigations were conducted to determine the mechanical properties, the residual stresses, the fatigue resistance, the hardness and the microstructure of hardened layers. As a result, the surface hardening technology is recommended for reconditioning and manufacturing cylindrical machine elements.

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Section: Experiments and Resultsmentioning

confidence: 99%

“…where A 1 is the critical temperature, A 1 = T As3 + 30...50°C with t min , τ min being the temperature and the time of the minimum austenite stability respectively, for the 45 steel grade t min = 510 o C, τ min = 1sec [10]. Thus, the cooling rate is equal to V k = 305 o C/sec for the steel grade 45.…”

Section: Experiments and Resultsmentioning

confidence: 99%

Surface Hardening of Parts Arc

Korolkova

Mashrabov²

2016

MSF

View full text Add to dashboard Cite

show abstract

Heat resistance of machine parts of metallurgical equipment

Cited by 1 publication

References 0 publications

Surface Hardening of Parts Arc

Surface Hardening of Parts Arc

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