Crack in neck of hollow shaft is a very serious malfunction, main cause of the crack include: foundry defect, centralized stress, quality problems of welding and heat treatment.
中空轴轴颈裂纹是水泥磨的严重故障。中空轴轴颈裂纹产生的原因主要有：铸造缺陷，应力集中，焊接和热处理质量问题等。
The result shows that if only we do strictly according to the welding technics requirements and adopt reasonable welding method, crack in neck of hollow shaft can be repaired well.
结果表明只要严格按照焊接工艺要求，采取合理的焊接方法能使中空轴轴颈裂纹得到很好的修复。
The result shows that if only we do strictly according to the welding technics requirements and adopt reasonable welding method, crack in neck of hollow shaft can be repaired well.
结果表明只要严格按照焊接工艺要求，采取合理的焊接方法能使中空轴轴颈裂纹得到很好的修复。
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