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含锆铸造镁合金铸件在X光透视时,底片上经常发现白色斑点。为了弄清其性质、成因及对拉伸性能的影响,曾进行了一些研究,发现这些白色斑点包括了几种不同性质的缺陷,其中一种是和液体镁发生了局部反应的砂粒即夹砂。这种夹砂在X光透视时是可以识别的,在金相检查时也能够判明,而且并非含锆合金所特有,在Mg-Al-Zn系合金中往往也存在着,只是在X光透视时不易发现。
Zirconium cast magnesium alloy castings X-ray fluoroscopy, the film often found white spots. In order to understand its nature, causes and effects on tensile properties, some studies have been carried out and found that these white spots include several different types of defects, one of which is a partial reaction with liquid magnesium sand that sand . This sand is visible X-ray fluoroscopy can be identified in the metallographic examination can also be identified, and not unique to zirconium alloys, Mg-Al-Zn alloys often exist, but in the X-ray When not easy to find.