Car pump tube

La description

Car pump tube transition temperature, the same transition time learning and organizational characteristics of each. Even if the same kinds of steel, as long as the final different purposes, the required organization and performance are not the same. Is the secondary cooling start temperature to the phase transition from a phase change cooling system of the end of the temperature range. The purpose of the secondary cooling by controlling the cooling rate of phase change and stop controlled cooling phase transition temperature control process to ensure rapid cooling after the steel microstructure to obtain the desired properties. Secondary cooling (aircooled) refers to the phase transition after cooling to room temperature within the range. As for the shop in the aircooling process will happen carbonitride precipitation, produce tempered bainite generated effects. For Gao Gao carbon steel or alloy steel aircooled after the phase transition will enable rapid cooling, the precipitated carbide continue oversaturated dispersed precipitates. Still used after the completion of the process, such as phase transitions, can prevent carbide precipitation, carbide solid solution to maintain its status, consolidate solution strengthening purposes.