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某钢铁厂的大型炼钢炉上的筒,高4 m,外径为400mm,壁厚为25mm,重量为1t,材料为中碳钢。要求用刷镀工艺将内外表面镀上一层抗高温氧化层。(一)模拟实验确定镀层的种类用45号钢板制作三块试片,试片尺寸为80×3×2mm。在三块试片上分别刷镀上一层铜、锌、镍,镀层厚度为0.10mm,然后将三块试样放入加热炉内,加热至900℃。保
A steel plant on a large steel furnace, 4 m high, outer diameter of 400mm, wall thickness of 25mm, weight 1t, the material is medium carbon steel. Requires the use of brush plating process will be coated with a layer of high-temperature surface oxide layer. (A) simulation experiments to determine the type of coating with 45 steel plate making three test pieces, test piece size of 80 × 3 × 2mm. Three layers of copper, zinc and nickel were respectively brushed on the three test pieces. The thickness of the coating was 0.10 mm. Three samples were placed in a heating furnace and heated to 900 ° C. Paul