Reasonable use response heats quench the technology solves manufacturing difficult problem

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What although cementite quenchs craft is in,obtain sclerotic layer is even distributing reach quench respect of the stability of quality, dependability is having incomparable advantage, but put in manufacturing cycle however in actual manufacturing process long, heat treatment is out of shape big, machine adds difference of difficult, clean sex, bad news to be able to wait for defect. And cementite quenchs these blemish of craft, be the induction heats quench technical advantage. Accordingly, how reasonable use response heats quench technology, it is a task that solves urgently. Gear of 2 heavy group company divide factory Liu afterwards to intervene as computer technology completely cementite process, atmosphere of the carbon inside burner of cementite temper by dipping in water got be controllinged accurately, make the sclerotic layer after cementite quenchs uniformity, sclerotic thereby the deepness of the layer, quench the stability of quality and dependability are able to assure. Together with home, especially heavy production industry is large-scale introduce machine of roll flute of numerical control figuration, the exterior aggrandizement means of gear more and more the heat treatment means that apt uses cementite to quench. And means of commonly used before inductive heat treatment, because quench aggrandizement effect is not stabilized, quench craze liability is bigger, obtain the sclerotic layer that distributings along tooth profile hard, effect of tine root aggrandizement is poor; The frequency that intermediate frequency increases pyroelectricity source and power are adjustable the gender is poor, be hard to realize an induction to heat quench the real time of parameter adjusts. The application on gear is accordingly less and less in recent years. For this, committee of job of heat treatment of gear of society of Chinese gear major quenchs at gear induction will be being held to heat in Taiyuan this year in September technical seminar is met, the author had favour to participate in this grand meeting. Delegate attending the meeting was summed up severally in recent years the induction heats quench the technology reachs successful experience in the applied achievement on gear surface aggrandizement, make we saw the induction heats quench the applied foreground on gear aggrandizement. The author regards the technology that will in professional gear manufactory be engaged in inductive heat treatment working for years as personnel, here, join a few real cases of course of study of one's own profession, talk about an induction to heat quench the technology is experienced in a few results on gear aggrandizement technology. What although cementite quenchs craft is in,obtain sclerotic layer is even distributing reach quench respect of the stability of quality, dependability is having incomparable advantage, but put in manufacturing cycle however in actual manufacturing process long, heat treatment is out of shape big, machine adds difference of difficult, clean sex, bad news to be able to wait for defect. The facility of line of of all kinds make friends that takes production of my group company advocate on gearing advocate the big modulus in baseplate of decelerate machine, gear (M > 25 above) for product of axis of gear, gear, because be put in the protective issue that is not cementite face, although be in cementite process,use the coating that prevent ooze to undertake protective to was not cementite place to adopt, but the effect is not distinct, make the half fine vehicle before grinding of axis of gear, gear, a type of local school in ancient times of energy lathe operator is painful, increase cutting tool to use up, the treatment working procedure that brings about the cementite layer that we must add to be not ooze place together after cementite, virtually added manufacturing cycle. Mainer still is heat treatment is out of shape big, the sclerotic layer that creates tooth flank in be machined actually distributings inhomogenous, out of tolerance of tine department measure, the loss of accuracy after roll flute, affect its normal use demand. If adopt the measure that increases allowance to try to solve, be about to increase cementite layer depth above all, can lengthen cementite cycle so, the brittleness that causes cementite layer at the same time increases, affect the service mass of the product. Cementite quenchs these blemish of craft, be the induction heats quench technical advantage. Accordingly, how reasonable use response heats quench technology, it is a task that solves urgently. The author thinks according to the working practice of old induction heat treatment, use an induction to heat to quench along roller seating space craft, can using next problems that solve afore-mentioned place completely to encounter what assure gear spare parts normally, premise is the following problem that should solve edge roller seating space to quench exist in craft: (1) edge roller seating space quenchs design and make of inductor. (2) right already how does the protection of hard tooth flank of temper by dipping in water prevent tooth flank namely " temper " . (3) quench the logical choice of cooling means. For this, be in for 8 steel 1750 rolling mill, country abundant 1450 rolling mill and ripples steel place of finish rolling of 1750 rolling mill advocate on the kind of ring gear aggrandizement that the bosomy form tine in gearing receives axial product, I divided a factory to do the roller seating space that use an edge to quench craft is replaced original cementite quenchs the attempt of craft respect, obtained remarkable result. Notable is, the heat treatment of 21 centuries develops to efficient, energy-saving, nicety, clean direction, advocate " do not have little free from contamination, less do not have distortion, less (quality) do not have dispersedly, less do not have wastefully, less do not have oxidation, less do not have reject decarbonization, little unmanned work, less " concept. And of our country " 10, 15 " the plan offerred an environment clearly also friendly model, managing the sources of energy economy develops policy. These make clear, regard a kind of cleanness, energy-saving heat treatment as craft, want to resolve its potential weakness only, the induction heats the vitality with quench the technology is had in the application on gear certain. What apply as technology of power source of inversion of IGBT of complete frequency solid state is increasingly mature, those who increase pyroelectricity source frequency and power is adjustable sexual problem gets be settlemented completely, the induction heats quench the implementation of parameter adjusts get assuring completely with control, add numerical control to quench the wide application of the machine tool, the induction heats quench quench the stability of effect of quality, aggrandizement and dependability will get assuring further. Because the frequency of power source is adjustable inside limits of 50 ~ 100Hz, range of sclerotic layer depth can satisfy gear completely kind the use requirement of the spare parts, and quench the deepness of the layer can amount to 10mm above, the cementite that this is now quenchs craft can not come true. Vessel of smelt metal make friends of future, ship, rise to wait for burden gear with mine again, develop to depth necessarily, and deep-seated cementite (> 5mm) be in at present level, our country still does not have mature technology, main show is in: (1) those who suit deep-seated cementite still get research with steel; (2) cementite cycle is long, quench metabolic problem is badly in need of wanting to solve; (3) the quality that how assures ooze layer, and the induction heats quench the technology has absolutely advantage in this respect undoubtedly. The author thinks, broad be engaged in worker of inductive heat treatment wanting to be passed hard only, the weak point that be in is put on gear aggrandizement in the light of its, have extensive, thorough research, find settlement way, believe prospective induction heats quench the technical application on gear can have more good prospect. CNC Milling