What is Heat-treatment ★∏✘in steel industries?

Heat-treatment is the ‌☆αprocess of heating and co∑¶✔lling metals, using specifi'₹> c predetermined meth Ω ©ods to obtain desired properti¥δes.

Common heat-treatment methods:∑" €

Normalizing: Heating steel or steel p¥∏∏'arts to an appropriate te ¶÷mperature above the critical point λ>↔♣AC3 or ACM for a certain period¥< of time and then cooling in the air t&<o obtain a heat treatment proce↔♥↔←ss for pearlite-like structure.

Annealling : Heat the h ≠αypoeutectoid steel workpiece to π♦≤20-40 degrees above '≈↓♣AC3, after holding it for a per♠♦<Ωiod of time, it is slowly✘€∑& cooled with the funac£∞∞e(or buried in sand or lime) to b€∑∑elow 500 degrees and cooled in the air.™ 

Quenching: A heat treatment✔©♠ processin which the steel is ♦®®βaustenitized and cooled at an ap$"​←propriate cooling rate to m±↔ake the workpiece undergo ma÷₹rtensite and other unstable $₹&✔structural transformations in thπ≈λ"e cross section or within a certain>"™ range

Tempering: The quenched w♠✔‍‍orkpiece is heated to an a→ α∞ppropriate temperature below the criti₽α≤cal point AC1 for a certain peri←® od of time, and then ♥π​ cooled by a method that meets the re>£∞☆quirements to obtain the required str±∞→ucture and performan>​ce of the heat treatment pr ∞ocess

What is QT?

QT is for Quenching a₽×≥£nd Tempering.

Anyang Longteng Heat Treatment&nbs✘÷p;uses multi- freque§↓ncy heating in our heati&<÷ng furnace, which can overcome the ♣&weakness of single frequency he'♥βating to the curie point of ine φ∞βfficiency. At the sam★&∞e time, different heating depths of & ↔§>nbsp;different frequencies can make the←•π  bars heated in a short time. ✔π★₽This is the technical guarantee of ra‌>pid heating.