Abstract
This paper presents the results obtained when combining mechanical and surface-thermal operations, using the same process equipment. The paper also demonstrates the possibility of implementing high-energy heating with high-frequency currents, and proposes using an integral temperature–time characteristic as the main parameter to specify surface quenching modes. The numerical values of the integral temperature–time characteristic are to be related to the processing modes and the depth of hardening. The experiments confirmed that an increase in the capacity will be commensurate with an increase in power consumption when a volumetric heating scheme (with a hardening depth of 0.5 mm) is realized. However, during the realization of a volumetric heating scheme, when the 0.7 mm depth of the hardened layer is at the boundary of the “hot” depth of the current penetration into the metal (the beginning of the intermediate heating scheme), the increase in the processing capacity will be higher than that in power consumption.
Highlights
The main aim of modern mechanical engineering development is to ensure the production of competitive and high-quality products [1,2,3,4,5,6,7,8,9,10,11]
This paper studies high-energy heating with high-frequency currents that is realized wa =ith0.1a2mmTimnhimainsudmpa ctahlepiacrkeannrecsessotofufadbthoieuetins0.d1humcitmgorh(Fa-icgetuivnreee1wr).igrTehy,isahnalelionawdtusicfnotorgrhewwaatilnligtthhbiyckhanniegosrshdoe-rffrequ powfremsieatnghtneditauindmethgiisrnepaaitepmrertuhaarmen nthotevhepli.recvkionuselyssstuodfiedthmeodiens; dowuincgtotorthaiscftacitv, tehewresiurlets, an in 0.12 mm and a clearance of about 0.1 mm (Figure 1)
We can draw the following conclusions: (1) When realizing a purely volumetric heating scheme, the increase in the processing capacity will be commensurate with the increase in power consumption
Summary
The main aim of modern mechanical engineering development is to ensure the production of competitive and high-quality products [1,2,3,4,5,6,7,8,9,10,11]. The development of high-frequency heating technology related to the use of radio frequencies, as well as to the miniaturization of inductors and equipping them with ferrite cores, has led to the emergence of a new method, i.e., high-energy heating with high-frequency currents (HEH HFC) This method allows for a technological quenching process with a specific heating capacity of about 400 MW/m2, which can successfully compete with other concentrated sources (laser, electron beam) meant for hardening the material without melting it (Figure 1) [7,12]. In view of the fact that the issues of developing new hpybrroiddmuacchtiinoe ntooal nsydsteminsdarue rsetlartieadltotecrcithicanl oprloodguciteiosn,ainnd itnhduestlriiatletrecahtnuolroegietsh, ere is ionaf ttihhmeesleeitesdryastatuetrmetsth’hdeeeresaiigsnnasalaalncykdsoiinfsterxoopdefurcitmthioeennstae. lfwfiocrkiseanimceyd oatfthtehaenasleysissyofsttheemeffisci’endcey signs
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