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2011年11 期
| 標(biāo)題 |
| 75 kg/m鋼軌鋁熱焊接頭斷裂失效研究(51 卷) |
| 英文標(biāo)題 |
| Study on fracture failure of 75 kg/m rail weld by thermit welding |
| 摘要 |
| 2010年下半年75 kg/m PG4淬火軌鋁熱焊斷裂接頭部分出現(xiàn)了同一形式的斷裂方式。本文通過宏觀斷口形貌、斷口掃描電鏡分析、裂紋源及擴(kuò)展區(qū)域金相觀察，以及力學(xué)性能測(cè)定等手段對(duì)斷裂接頭進(jìn)行失效分析。分析認(rèn)為，斷裂接頭的起裂位置是在軌頭下顎與焊筋邊緣相交處，通過疲勞裂紋 |
| 作者 |
| 新聞作者:李金華，李力，丁韋，劉政文 |
| 關(guān)鍵字 |
