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详细说明
*bk1系列材质为优质氮化钢38crmoal、sacm645*氮化保温:505℃38小时、550℃34小时*氮化层深:单边0.48mm以上*氮化层硬度:hv960 以上*直线度每米小于0.06*料管生产范围:内孔(?14-?250)长度5000mmbk1 series(nitride barrel)*bk1 series is made of high quality nitride steel 38crmoal、sacm645*nitride insulation:38 hours of 505℃,34 hours of 550℃*nitride layer deep:unilateral more than 0.48 mm*the hardness:hv960 above*straighthess is less than 0.06 per meter*feed barrel production within the scope of hole (?14-?250)length is 5000mm
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