Notes

AFFECTING ASPECTS OF THE SOLUTION THERAPY
Remedy treatment refers to the warm treatment process in which the alloy is heated to the high temperature single-phase area and also kept at a continuous temperature, to ensure that the excess stage is fully liquified into the solid remedy and afterwards cooled down quickly to get the supersaturated strong remedy. It is generally used for castings.
Home heating temperature, holding time as well as air conditioning price are the major parameters that ought to be regulated in solution treatment.
1. In principle, the home heating temperature level can be established according to the corresponding stage diagram. The ceiling temperature is normally near the strong line temperature or eutectic temperature level. At such a high temperature, the alloy has the optimum solid solubility as well as fast diffusion rate. However the temperature level needs to not be too high, otherwise it will lead to reduced melting point eutectic and grain border phase melting, that is, over-burning sensation, creating appeasing fracturing and lowering toughness. The minimum heating temperature level need to be more than the option contour, or else the performance will certainly not meet the requirements after aging. The series of permissible home heating temperatures may vary extensively from alloy to alloy. The heating temperature series of some copper alloys and also alloy steels is vast, while the relieving temperature variety of the majority of light weight aluminum alloys is really slim, some also only ± 5 ℃.
Hose Fitting
2. The function of heat conservation is to completely transform the alloy structure to the state needed for quenching. The holding time mostly depends on the alloy make-up, the material pretreatment and also original framework, home heating temperature level and so forth, however likewise with the amount of heating system, work surface density, heating approach and also various other factors. The initial structure is fine, the home heating temperature is high, the loading amount is little, the work surface section size is tiny, the holding time is short.
3. Quick cooling is usually utilized in solution treatment. The function of quick cooling is to prevent the precipitation of the second phase during the cooling procedure as well as guarantee the optimum supersaturation of solute atoms and jobs, so as to acquire the highest stamina and also best deterioration resistance after aging. Water is commonly made use of as an effective quenching medium, and the cooling rate attained by appeasing in water can meet the demands of many aluminum, magnesium, copper, nickel as well as iron based alloy items. Nevertheless, relieving in water can easily trigger big recurring stress and contortion. To overcome this drawback, the water temperature level can be appropriately elevated, or relieved in oil, air as well as some special natural media. Some unique quenching methods, such as isothermal quenching and fractional quenching, can likewise be utilized.

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