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Shanaurin, A. M.; Veksler, A. Z.; Ничипурук, А. П.; Vatolin, S. M.

doi:10.1023/a:1022126909914

Cited by 9 publications

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“…2a), where 2 is the number of steps of the amplitude increment for the pulses with a polarity opposite to the initial one. For this cycle, the following control parameters can be used [7]: ∇H rm , ∇H rns , ∇H rn0 , ∇H rnpris2 , ∇H rn02 , and ∇H rnm2 . Table 3 presents expressions for the pair correlation between the hardness and the parameters listed above for the i = 2 magnetization-magnetization reversal cycle for specimens tempered at temperatures from 100 to 600°C.…”

Section: Resultsmentioning

confidence: 99%

“…For many steel grades with a content of carbon exceeding 0.3%, it was found that these characteristics feature unique dependences on the tempering temperature over a wide range of temperatures. The results of these studies were generalized in [1, 5] and used as a basis for the development of relaxation-coercive-force meters that magnetize specimens either in the interior of a solenoid [6] or by use of an attachable magnet [7]. These devices can be successfully used to solve many practical problems.…”

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confidence: 99%

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Inspection of the Strength Characteristics and Heat-Treatment Quality of Ferromagnetic Articles Based on Parameters of the Residual-Magnetization Hysteresis Loop upon Their Local Magnetization and Magnetization Reversal in a Pulsed Magnetic Field with a Variable Amplitude: II. Steel 60C2

Matyuk

Mel’gui

Pinchukov

et al. 2005

Russ J Nondestruct Test

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Effects of the tempering temperature on specimens' hardness and on the anomalous-hysteresis loop's and the recovery curves' parameters for residual magnetization are experimentally studied. Test specimens made of steel 60C2 intended for laminated springs were subject to local magnetization and magnetization reversal by a pulsed magnetic field with a variable amplitude. Parameters enabling tests of the hardness of steel within three ranges of the tempering-temperature variation (0-300, 300 − 600, and 0-600 ° C) are determined.The hardness of items made from medium-carbon, high-carbon, and alloy steels that have been quenched and tempered at low temperatures (100-300 ° C) can be efficiently determined using coercive-force-measurement methods [1][2][3]. The pulsed magnetic method [4] enables testing of the hardness, strength, relative elongation, and contraction of cold-and hot-rolled low-carbon steels after their recrystallization annealing. However, none of these methods are suitable for testing mechanical properties of items made of steels containing more than 0.3% of carbon and have been subjected to quenching and subsequent high-temperature tempering. The Institute of Metal Physics has carried out a large amount of research devoted to the use of relaxation characteristics: relaxation coercive force H r , relaxation magnetization , relaxation permeability χ r , and residual induction B d either after partial demagnetization of specimens for the same values of demagnetizing constant field H pris or B d after partial demagnetization by variable field H pris of constant amplitude. For many steel grades with a content of carbon exceeding 0.3%, it was found that these characteristics feature unique dependences on the tempering temperature over a wide range of temperatures. The results of these studies were generalized in [1, 5] and used as a basis for the development of relaxation-coercive-force meters that magnetize specimens either in the interior of a solenoid [6] or by use of an attachable magnet [7]. These devices can be successfully used to solve many practical problems. There are, however, some problems that cannot be solved using available test methods. For example, it is inexpedient to magnetize multiple-leaf springs or other bulky items inside a solenoid, while items with intricate shapes (e.g., billets for gears or sprockets, etc.) or low-quality surfaces are not suitable for a device with an attachable magnet, since the sensitivity of such a device to the deviation of the test zone from a plane or to variations in the gap results in significant errors.The pulsed magnetic method involves magnetization of an item by a pulsed magnetic field produced by an attachable solenoid and measurement of the normal component of the gradient of the residual magnetization strength along the symmetry axis of the magnetizing field. This method can be used for any specimen regardless of its shape. The error related to the variation of the gap between the probe and the tested specimen does not exceed 2% for a change in the g...

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%