【摘要】：利用化學(xué)分析、硬度檢測(cè)、超聲波探傷、光學(xué)顯微鏡、掃描電鏡及能譜儀等手段,對(duì)行星軸巴氏合金出現(xiàn)的異常掉塊、燒傷失效現(xiàn)象進(jìn)行分析。結(jié)果表明,巴氏合金鉛含量異常高,超探顯示局部有小面積結(jié)合不良,合金與鋼背結(jié)合部位存在斷續(xù)錫層等情況。經(jīng)分析,認(rèn)為造成巴氏合金異常掉塊、燒傷的主要原因在于巴氏合金中雜質(zhì)鉛含量太高,鉛沿晶界析出形成網(wǎng)狀鉛,分割了基體組織,降低了合金強(qiáng)度和塑性。并且由于工藝不良造成了結(jié)合缺陷,使得巴氏合金出現(xiàn)早期疲勞、脫殼剝落而失效。
[Abstract]:By means of chemical analysis, hardness testing, ultrasonic flaw detection, optical microscope, scanning electron microscope and energy dispersive spectrometer, the abnormal loss of block and burn failure of Babbitt alloy on planet axis were analyzed by means of chemical analysis, hardness test, ultrasonic flaw detection, optical microscope, scanning electron microscope and energy dispersive spectrometer. The results show that the lead content of Pasteur alloy is extremely high, the superprobe shows that there is a small area of poor binding in the local area, and there is a intermittent tin layer in the bonding part between the alloy and the back of the steel. It is considered that the main reason for the burn is that the impurity lead content in Pasteur alloy is too high, and lead precipitates along the grain boundary to form reticulated lead, which divides the matrix structure and reduces the strength and plasticity of the alloy. Due to the poor process, the bonding defects caused by the poor process, the Pasteur alloy appeared early fatigue, peeling off the shell and failed.
【作者單位】： 海裝重慶局;
【分類(lèi)號(hào)】：TG115

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本文編號(hào)：2491870