hydrogen embrittlement crack

基本解釋

The hydrogen-induced delayEd crack and the embrittlement of coarse-grained HAZ are the main problems influencing the welding quality.
焊接質(zhì)量問題主要表現(xiàn)在出現(xiàn)氫致延遲裂紋和焊接粗晶區(qū)的脆性。
Figure 17 is a scanning electron microscope view of a typical hydrogen embrittlement crack where separation occurs along grain boundaries.
圖17示意了用電子顯微鏡掃描出的沿晶粒邊界產(chǎn)生的氫脆裂紋。
The results show that tiny crack main by using the unqualified protect gas(Ar)during welding could cause the increasing hydrogen contain in the weld area, created the hydrogen embrittlement crack.
結(jié)果表明：由于焊接工藝規(guī)范控制不當(dāng)，未及時(shí)進(jìn)行消氫處理，焊件的碳當(dāng)量提高具有明顯的淬硬傾向，焊接結(jié)構(gòu)和較大的焊件厚度引起拘束應(yīng)力等綜合作用產(chǎn)生了延遲裂紋。