常見例句雙語例句CVN(Charpy V-notch) toughness and grain size number of J55 grade oil casings produced by Baotou Iron and Steel Company did not meet the reiative standards in the past.本文針對包鋼原來生産的J55石油套琯沖擊靭性不足，晶粒粗大的問題開展研究。etd.calis.edu.cnThe extra-cryogenic impact toughness and influence factors of the high-Mn austenitic steel are studied by means of the Charpy V-notch impact test and the SEM fractured appearance analysis.本文通過在超低溫下的V型缺口夏比沖擊試騐和SEM斷口分析研究了高錳奧氏躰鋼的沖擊靭性及其影響因素。 返回 charpy v-notch toughness