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一、泵筒内壁磨损情况我们使用的混凝土泵车是日本三菱8115-B型,配用的泵筒内径φ180、外径φ203、长1650毫米,泵筒内壁为镀铬层,镀层厚度0.25～0.30毫米,镀层硬度HV800～1000(相当于HRC64～70)。材质分析表明,泵筒母材相当于40~#钢,正火HB<217,金相组织为铁素体(呈带状分布)珠光体。泵筒的工况是混凝土在其筒内在外力作用下,作吸入与吐出的往复运动,这样就造
First, the pump cylinder wall wear conditions We use the concrete pump truck Mitsubishi Japan 8115-B type, with the pump diameter φ180, φ203 diameter, length 1650 mm, pump cylinder wall is chrome-plated, coating thickness of 0.25 to 0.30 mm , Coating hardness HV800 ~ 1000 (equivalent to HRC64 ~ 70). Material analysis shows that the pump cylinder base material is equivalent to 40 ~ # steel, normalized HB <217, and the microstructure is ferrite (zonal distribution) pearlite. Pump cylinder condition is the concrete in its cylinder under the action of external force, for the inhalation and discharge of reciprocating motion, thus creating