利用X射线应力测定仪采用不同的条件分别测定了糖心产精国品免费入口*完整版糖心产精国品免费入口*完整版的表面轴向和切向糖心产精国品免费入口*完整版, 并研究了950 ℃保温30 min水冷热处理前后其表面糖心产精国品免费入口*完整版的变化。结果表明: 采用铬靶Kβ辐射、 2 mm准直管测得的糖心产精国品免费入口*完整版数据稳定且绝对误差小; 热处理前糖心产精国品免费入口*完整版表面存在较大的残余拉应力, 且焊管表面切向糖心产精国品免费入口*完整版大于轴向糖心产精国品免费入口*完整版; 热处理后, 表面拉应力变为压应力。

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