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一批枪闩于磁粉探伤时发现36％的废品。报废原因是矫正与酸洗程序安排失当,使枪闩在应力状态下进入酸洗而产生氢致应力腐蚀。作工艺对比试验证实了这一分析结果。 一、裂纹分析 枪闩系采用50BA热轧圆钢(φ34mm)不经锻造直接切削加工成形。经热处理后
A block of gun found 36% of scrap on magnetic particle inspection. Reasons for retirement correction and pickling procedures arranged improperly, so that the bar into the pickling stress state into the resulting hydrogen stress corrosion. Process for the comparison test confirmed the results of this analysis. First, the crack analysis Barrel system using 50BA hot-rolled bar (φ34mm) without forging direct cutting forming. After heat treatment