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一、冲击值的测定及试验结果冲击试验的过程很简单,先将摆提起来进行空打,以校准零点。然后重新提起摆,将摩擦指针置于最大能量处,试样放于支座上,用特殊样规校准试件缺口位置,使缺口位置正好在支座中间和刀口位置上,然后释放摆,冲断试样,记下摩擦指针所指的能量位置。一般金属的冲击韧性往往用相对韧度来表示,即把试件所吸收的功(即冲击值)A_K除以试样切口处横断面积F,就可以求得冲击韧性。α_K=A_K/F A_K的单位用公斤米,英制采用的是呎磅,目前世界上也有采用焦耳的。F是面积,单位是平方厘米。
First, the impact of the value of the test and test results The impact of the test process is very simple, put the first put up for air hit, to calibrate the zero. Then lift the pendulum, place the friction finger at the maximum energy, place the specimen on the support, and calibrate the notch position of the specimen with a special specimen so that the notch position is exactly at the middle of the support and at the edge of the blade, then release the pendulum and punch Broken the sample, note the location of the energy pointed by the friction hand. Impact toughness of the metal is often used to indicate the relative toughness, that is, the work piece absorbed by the specimen (ie impact value) A_K divided by the cross-sectional area of the sample notch F, you can get the impact toughness. α_K = A_K / F A_K in kilograms of rice units, the British system uses the foot pounds, the world has also adopted Joule. F is the area in square centimeters.