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    公司主營:沖擊試驗臺高低溫沖擊試驗箱氙燈老化試驗箱步入式環境試驗箱

    關于冷熱沖擊實驗室的發展史


    關于冷熱沖擊實驗室的發展史

        冷熱沖擊實驗室http://www.dghuanyi.com/products_content-561691.html誕生至今,已經有了100多年的歷史,其可以說是縱橫在材料沖擊能力行業當中,每一天都在進步,發展到了現在,已經可以說是一款比較有完善性的裝置,詳細資料請往下看。

        我國的沖擊試驗,解放前幾乎的是沒有是,解放后全面學習蘇聯,知道1963年才出現第一個沖擊試驗標準GB229-1963,我們現在是用的最新的標準是GB/T229-2007《金屬材料夏比擺錘試驗方法》,這個標準也適用于美標和歐標。

        沖擊試驗自1905年左右問世以來發展的很快,現在已經成為了材料性能不可缺少的檢查項目,最初的試驗方法各式各樣,但是隨著時代的發展:夏比鎖形沖擊試驗、夏比V型沖擊試驗和夏比梅氏沖擊試驗得到了廣泛的重視。1968年之前美國都是采用夏比鎖形沖擊試驗方法,但是這種試驗方法有個小缺點:由于鎖形缺口過鈍,由此來確定脆性轉變溫度低于結構的脆性斷裂溫度,因此68年以后,在ASTM規范中就改用采用標準夏比V型試樣,所以現在采用V型試樣和梅氏沖擊試樣的比較多。總體來說歐美采用夏比V型缺口較多,而俄羅斯則是采用夏比梅氏試樣。

        東莞市環儀儀器科技有限公司冷熱沖擊實驗室的原理就是能力守恒定律,按照擺錘打斷沖擊試樣后損失多少計算沖擊功。但是這種試驗方法天生就有一個缺點,不能像拉伸試驗機那樣直接顯示里和位移的曲線,因為我們測量出來的結果只能是沖擊功,沖擊功是能力單位,它的單位是焦耳,而能量的公式是:

    W=FS

        即沖擊功=力*位移,所以這兩個變量無論哪一個發生變化都會引起沖擊功的變化,尤其是位移。所以沖擊功這一數值不能直接說明材料的韌性如何,不能描述材料在打擊過程中產生的變化,只能作為一個參考。為了解決這個問題,人們就研發了儀器化解沖擊試驗的方法,所以說環儀儀器冷熱沖擊實驗室是目前較為先進的沖擊試驗設備。

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