用楔子压入试验来检定灰铸铁的强度不是一个新的方法,但这一方法还未普遍使用。由于通常采用的试棒强度无法代表某一铸件某一部位的强度,这样就提出了用楔压试验来测定铸件强度的课题。经过试验,证实这一方法是可靠而简便的。并且借此可简单地测定试棒的抗拉强度;省却了抗拉圆试棒的车削工作;改 It is not a new method to test the strength of gray cast iron with a wedge press-in test, but this method is not yet in common use. Since the strength of the test bars which is usually used can not represent the strength of a certain part of a casting, the problem of determining the strength of the casting by the wedge pressure test is proposed. After testing, this method proved to be reliable and easy. And thus can be easily measured test bar tensile strength; save the turning round test bar turning work; change