Development Of Scans Induction Hardening Process For Single-Tooth

Induction hardening process is one of the important heat treatment process, withquenching and tempering, carburizing, nitriding to constitute four greatest basalprocess together. Induction hardening process developed an important function duringthe development process of the tooth face hardening technique that from the soft toothface to hard. But over several years, in our country induction hardening technique ofbig modulus gears developed so more slowly and difficult to adapt a new request. Inthis paper, based on a research of the key control factors of inductor, the coolingcapabiliaty of water-based polymer quenchant and the basic quenching, come intobeing a whole set induction hardening process of big modulus gears hardeningtechnique, to resolve the urgent, actual technique problem in production.firstly, Carried on detailed analysis and research to each technique parameter ofinductor, gives a distribute of inductor side gap and technique parameter ofmagnetizer. According as these guidelines to design and produce the inductor,achieving the uniformity of hardening layer along the tooth flank, every guidelinearrived at a good result.Secondly, Carried on a full research to the cooling capability of the KR6480polymer quenchant. By study test data and industry experiment, synthesize actualwork condition and economic cost, confirm the reasonable density which used forgear induction hardening process. The density polymer quenchant solved the problemof gear cracking, guaranted the credibility of the craft and the product quality.Thirdly, By the works of two basic researches: "craft parameter and normresearch" and" heat treatment norm research", established the criterion of scansinduction hardening process of single-tooth .The shift gears of paper machine that themodulus equals 10 mm were processed of a batch. It is proved that the craft iscredible. It impeled the induction hardening in the high-parameter and hardeningflank gear produce.Fourthly, combining with digital control technics, the software of intermediatefrequency single-flank in a series quenching process. The software solved theproblems of helical gears and double-helical gears. It can achieve the intention of themanipulator. The practice indicated that the software has a good application value. Finally, Carried a comprehensive examination on quenching model, validatedan practical examination on previously work .Through the test, the result of scansinduction hardening process of single-tooth has next some characteristics:①Hardening layer distributing is uniform and series, Simulation distributionbetter, ajoin tooth's tempering interfere less.②Hardening layer's microstructure transform uniformly, martensitemicrostructure is fine, hardening layer transition is very obvious and quite narrowtempering transtion.③Hardening test show that the hardening layer's hardening is very good,hardening gradient change fast, tempering's transition hardening change soft veryabvious.Above charactics show hardening layer have very typical productionhardening's charactics, each capability index satisfies high parameter and hard toothflank. Craft work's quality is very stability. So the scans induction hardening processof single-tooth have more advanced, especially with Mn≥10mm gear.