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根据炭素工具钢、合金工具钢、高速工具钢、轴承等钢种的有关技术条件,工具钢断口的主要要求可归纳为:断口应均匀,晶粒细致,不应有肉眼可见的空隙、裂缝、夹杂、气泡、夹渣、分层和白点。我们统计了本厂三年中断口检验的数据,发现过的各种缺陷及所占检验炉数的百分比如下:缩孔1.32%、白点0.71%、夹杂0.31%、中心偏析0.28%、收缩疏松0.19%、内裂0.16%、气泡0.12%、过热
According to the relevant technical conditions of steel such as carbon tool steel, alloy tool steel, high speed tool steel and bearing, the main requirements of tool steel fracture can be summarized as follows: the fracture should be uniform and the crystal grains should be meticulous; Inclusions, bubbles, slag inclusions, delamination and white spots. We have counted the data of the three-year break-mouth test in our factory and found the following defects as a percentage of the number of furnaces tested: 1.32% shrinkage holes, 0.71% white spots, 0.31% inclusions, 0.28% center segregation, 0.19%, internal crack 0.16%, bubble 0.12%, overheating