铸造风电主轴锁定孔开裂原因OA
Causes of locking hole cracking of cast wind power spindle locking hole
某QT500-14铸造主轴锁定孔在切割后发生开裂现象,采用宏观观察、化学成分分析、扫描电镜分析、金相检验、力学性能测试等方法分析锁定孔开裂的原因.结果表明:切割面附近存在明显的石墨密集分布区域,在切割过程中引入的组织应力和热应力等作用下,该部位产生微裂纹,裂纹在残余应力的作用下不断延伸,最终导致该主轴锁定孔开裂.
The locking hole of a QT500-14 casting spindle cracked after cutting.The reasons for the cracking of the locking hole were analyzed by means of macroscopic observation,chemical composition analysis,scanning electron microscope analysis,metallographic examination and mechanical property test.The results show that there was an obvious graphite dense distribution area near the cutting surface.Under the action of organizational stress and thermal stress introduced during the cutting process,micro-cracks were generated in this area.The cracks continued to extend under the action of residual stress,which eventually led to the cracking of the spindle locking hole.
张振;刘哲;刘珑;杨开彬
金雷科技股份公司,济南 271100齐鲁工业大学(山东省科学院)山东省材料失效分析与安全评估工程技术研究中心,济南 250014
金属材料
风电主轴锁定孔切割裂纹应力集中石墨残余应力开裂
wind power spindle locking holegas cutting crackstress concentrationgraphiteresidual stresscracking
《理化检验-物理分册》 2024 (006)
46-50 / 5
国家自然科学基金项目(12075127)
评论