To summarize the events seen :
· Steel, started to be heated for quenching , the body-centered cubic structure consists of the unit mesh . There is no carbon atoms in the cage .
· 700 º C ? When it comes to temperatures above , KHM ? Line cells face-centered cubic lattice temperature effect gradually begins to take form .
· Ostenizasyo temperature is reached , only the structure of the steel KYM ary cages formed. To enter into the cage of carbon atoms, the space was born .
· Sudden quenching with carbon atoms having sufficient time to escape because t- is trapped in a cage . Because of the inherent carbon atoms in a cage is a very tense situation ( before tempering state). Soğutuls was slow , the atoms would have time to escape . Would not harden .
· Menevişleş stresses will be resolved in a cage on the stage . Revealed a structure more compatible with each other .
Water supply : all steel has a suitable quenching medium . This environment, air, oil, hot bath can . Hardening of the parts when the hot bath water will be held until the bath temperature equilibrated . Wait for it to cool to 80 º C , the most ideal , then rinse with hot water to get into the tempering furnace is . Quenching, tempering step by step part of the room temperature drops to cracking or breakage may occur. So I will go tempering untouched will be tempered to a temperature has dropped .
Shaped parts in the hot water washing is very important for water -salt bath . On the part enters the tempering with salt residues consisting of strong acid with t the point where the effect of high temperatures begin carving . Heat treatment in the track from the user does not notice salts , pitting during operation continues . Early or late breaking with the show itself. Therefore, if small parts must be welded from salt bath , the hot water and large should be brushed with a wire brush . It is necessary to remove residual salts . Also, the surface of the part to be oxidized or be shipped is kept immersed in oil .
Equilibration : 80 º C of the steel ? After the cooled put into an oven at 100-150 ° C , is held at this temperature . Especially large dies and tools to reach the same temperature for all the sections are critical .
Retention time: the time required for austenitizing temperature after leaving the track completely he should start . After austenitizing temperature of the oven reaches the part is expected to reach the austenitizing temperature . After this holding period starts running . The difference depends on the time interval following features :
v Parts on the size of
V shape (round , flat , cube)
have on the capacity of the oven , the genus
v Heat to
Part of whether you have packed packed
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