Researchers said the zircon's high level of heavy oxygen isotopes suggest it was cooled by surface water after it formed. 研究人员说锆石的高标准重氧同位素暗示了它形成之后靠地表水来冷却。
The inner stress produced by quick cooling during quenching is the basic reason of formation of quench-distortion of parts. 摘要淬火过程中的快速冷却在工件内部产生的内应力是导致淬火变形的根本原因。
