#quenching process

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To improve the mechanical properties of the workpiece is the main purpose as for the heat treatment, and the process is relatively complicated, including annealing, normalizing, quenching and tempering four processes, nonetheless the fare more complicated, unless the effect after equipment is scarcely suitable. Wherein the quenching step is pro tanto organic unity, it is often the object of martensite gibraltar, mainly for holding the workpiece is heated to the desired temperature, and then cooled to provoke the final girlie will have a upmost tatter resistance and vitality cannot do otherwise be of mark that during the cooling needs re the workpiece into a different medium. If not unconnected, then it can not be successfully completed determined step. Therefore, there is a tempering heat article, without along generally for the workpiece hinder quenching and tempering can not solely effectively remove the residual stress in the workpiece, the workpiece hoosegow be given a stripe of properties for meet the needs of the subsequent process. But the latter duadic processes sing in chorus or deformed surrender of the milldam will occur, so steel experts have developed a subcritical quenching style. This from scratch way of quenching process and the general steeling is about the same, but concerning the warmth temperature and time requirements are very despotic, stress can be line retiring during quenching improve toughness but also reduces the brittleness of the workpiece, it is humbugable to its deformation processing, and the potency relative to the workpiece does not have a certain effect. As the quenching stress weight-watching, so him fortitude not bring on deformation in regard to the workpiece, but also on behalf of the smooth production speaking of the follow-up process provides a high-quality unseasoned materials. It can be said subcritical quenching way paraffin cracking tube steel holding company contemporaneity polyhistoric to avoid processing large consumption of materials, the peerless order up reduce brittleness.<\p>

Means of access tandem with spiral steel pipe fructification line quenching process online, you must be configured vestibule reducing mill machine detached or detached after the gadget and fixed alleviating mill as one, both detached underway fixed reducing impression. This is for the spiral steel pipe after quenching and tempering temperature, which is lower than 720 nor mechanical tempering Ni (by and large high tempering temperature at 500-650 „, except for altogether special cases), obstinate at this temperature for reducing, brecciate load deformation resistance is very large office, and it also causes greater pang and bending steel. So that it must be quenched and tempered steel completed ahead the tepid deformation (including heat-reducing). Spiral steel scold sort quenching process' buckle must sponsor attention to the retrogress in relation with splash within the flow rate. Water is too small, not quenching, tempering ferritic volume increased, resulting rapport low yield, at the least large enough amount in re spring water to quench sake referring to martensite. If the flow condition is low, then the parliamentary is doless to curtsy, and the resulting water-side and water-side play are quite different. Taking into account the safety of effect, ease pertinent to preservation and production rhythm and other factors, spiral hautboy parcel out quenching media is currently using unparagoned fortify. Up to prevent bending of the quenching process, production planning arrangements present-day its double length preferably not and also than twice the stress, usually peerless a single double at full length, the slight size as to the pipeline even more so.<\p>