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落(luo)錘(chui)沖(chong)擊試(shi)(shi)(shi)驗(yan)機工(gong)(gong)作原理：重錘(chui)從(cong)不(bu)(bu)同(tong)高度落(luo)到試(shi)(shi)(shi)樣(yang)（片(pian)、薄膜、制(zhi)品）上(shang)，求取落(luo)下高度與試(shi)(shi)(shi)樣(yang)破壞率(lv)的關系。用(yong)破壞率(lv)為50%時的落(luo)下高度來表(biao)示(shi)試(shi)(shi)(shi)樣(yang)的抗(kang)沖(chong)擊能(neng)力。用(yong)以測(ce)定鋼材(cai)無塑性(xing)(xing)轉變(bian)（NDT）溫度的一種特殊(shu)沖(chong)擊試(shi)(shi)(shi)驗(yan)。主(zhu)要(yao)試(shi)(shi)(shi)驗(yan)裝置為落(luo)錘(chui)試(shi)(shi)(shi)驗(yan)機。下部(bu)為底(di)座與支架(jia)，機架(jia)上(shang)部(bu)配有可調換的不(bu)(bu)同(tong)質量的重錘(chui)（圖4—37）。在(zai)規(gui)定尺寸的鋼板上(shang)方(fang)中(zhong)部(bu)按縱向(xiang)有一條用(yong)脆性(xing)(xing)焊條焊成(cheng)的焊道，在(zai)焊道的中(zhong)部(bu)（也(ye)是鋼板中(zhong)央）加工(gong)(gong)出一道缺