中温回火(250-500度)中温回火所得组织为回火屈氏体。其目的是获得高的屈服强度,弹性极限和较高的韧性。
Medium temperature tempering (250-500 degrees), medium temperature tempering income group as tempered troostite. Its is to obtain high yield strength, elastic limit and high toughness.
因此,它主要用于各种GB/T9711.1搪瓷管和热作模具的处理,回火后硬度一般为HRC35-50。
Therefore, it is mainly used for various kinds of GB/T9711.1 enamel tube and hot mould processing, after tempering hardness is HRC35-50 commonly.
低温回火(150-250度)低温回火所得组织为回火马氏体。其目的是在保持淬火钢的高硬度和高耐磨性的前提下,降低其淬火内应力和脆性,以免使用时崩裂或过早损坏。
Low temperature tempering (150-250 degrees), low temperature tempering the organization for the tempered martensite. Its aim is to keep a hardened steel under the premise of high hardness and high wear resistance, decrease the quenching stress and brittleness, lest when using split or premature failure.
它主要用于各种高碳的切削刃具,量具,GB/T9711.1搪瓷管,滚动轴承以及渗碳件等,杭州锅炉配件批发价,回火后硬度一般为HRC58-64。
It is mainly used for cutting all kinds of high carbon cutting,杭州锅炉配件大全 , measuring tool, GB/T9711.1 enamel tube,杭州锅炉配件报价, such as pieces of rolling bearing and carburizing, after tempering hardness is commonly HRC58-64.
搪瓷管的技术特点
目前,无论是工业锅炉还是电站锅炉,搪瓷管空气预热器的低温腐蚀、堵灰和磨损,直接影响锅炉的安全性和可靠性。尤其是燃用高硫份、高灰份煤种时,问题更加突出。搪瓷管空气预热器彻底解决了这些问题,既抗磨,又耐腐蚀,结构简单,使用寿命达7万小时以上。技术特点:该换热器的换热管,是一种特殊的搪瓷管,搪瓷管连接在管板上。本产品能同时强化管内、外侧气流与管壁的对流换热,使预热器的传热系数大大提高,在换热性能不变的情况下,杭州锅炉配件,换热面积减小,搪瓷管空气预热器体积减小;能有效防止低温腐蚀,不堵灰;承受300℃的温差变化而不脱瓷。由于采用新型结构,检修时,可随意更换单根或数根换热管。