在制造电厂制粉系统管道伸缩节时,要剪切大量园弧(?)板料(图一),材质是 A3,板厚2mm,在自制园盘剪床上剪切。以前剪刀片是用 T7工具钢制造的经淬火——低温回火处理,硬度 HRC50.剪切直料时使用还可。剪切园弧形工件时,只剪几块工件就出现明显的磨损,连换三付剪刀片,还没剪到200块,刀片则全部报废.按长度计算,每付刀片的剪切长度还不到110米。 In the manufacture of power plant pulverizing system pipe expansion joints, to cut a large number of garden arc (?) Sheet material (A3), thickness 2mm, cut in the homemade garden shears. Scissors before the blade is made of T7 tool steel quenched - low temperature tempering, hardness HRC50. When cutting arc-shaped workpieces, only a few pieces of work appear obvious wear and tear, even for three pairs of scissors, not yet cut to 200, the blades are all scrapped.According to the length of the calculated length of each blade cut Less than 110 meters.