畢業論文

打賞
當前位置: 畢業論文 > 材料科學 >

上引連鑄銅鎂合金桿中心縮孔形成機理

時間:2019-07-06 13:09來源:畢業論文
研究了高鐵的接觸線在生產過程中出現的縮孔問題。發現熔液溫度,粘度純凈度,冷卻強度和上引速度均對縮孔形成有影響。實驗結果表明:在上引連鑄生產中,冷卻強度越高,越不容

摘要:本文主要研究了高鐵的接觸線在生產過程中出現的縮孔問題。發現熔液溫度,粘度純凈度,冷卻強度和上引速度均對縮孔形成有影響。實驗結果表明:在上引連鑄生產中,冷卻強度越高,越不容易產生縮孔,冷卻強度越低,越容易產生縮孔,冷卻強度以25-30l/min為宜。初始溫度越高,越容易產生縮孔。上引速度越快,越容易產生縮孔,上引速度最好225mm/min-261 mm/min之間不容易產生縮孔。冷卻水進水溫度高,冷卻強度越低,縮孔形成概率越大。36835
畢業論文關鍵詞:上引連鑄;縮孔;冷卻強度
Mechanism on center of shrinkage cavity of Magnesium copper alloy rod with continuous up-casting
Abstract: This paper mainly studied the high iron contact line shrinkage cavity of the problems in the process of production. Found molten temperature, cooling intensity and the lead-rate all have an impact on shrinkage cavity formation. The experimental results show that in the continuous casting production, the higher the cooling intensity, the less prone to shrinkage, the higher the initial temperature, the more prone to shrinkage cavity. The lead faster, more prone to shrinkage, the best speed is not prone to shrinkage lead between 228mm/min-261mm/min.cooling water inlet temperature is high ,the lower the cooling intensity, the greater the probability of shrinkage cavity formation.
Keywords: The continuous up-casting;shrinkage cavity;cooling intensity
目錄
1.前言    1
1.1高速鐵路用接觸線的種類及特點    1
1.1.1.高鐵用接觸線的加工方法    1
1.1.2.高鐵對接觸線要求    2
1.2銅鎂合金接觸線的生產    2
1.3上引連鑄簡介    3
1.4.上引連鑄缺陷    4 源¥自%六:維;論-文'網=www.aftnzs.live
1.5上引連鑄銅鎂合金桿中心縮孔形成影響因素    5
1.5.1.溶液粘度    5
1.5.2.熔液溫度    5
1.5.3.熔液純凈度    5
1.5.4.冷卻速度    6
1.5.5.上引速度    6
1.6選題的目的和意義    7
1.7課題的研究內容和目標    7
1.7.1.研究內容    7
1.7.2.研究目標    7
2.實驗    9
2.1試驗材料    9
2.2試驗方法    9
2.2.1.縮孔診斷    9
2.2.2.上引連鑄工藝參數對銅鎂合金桿中心縮孔形成的影響    9
2.3實驗設備    10
2.3.1.上引連鑄機    10
2.3.2.金相顯微鏡    11
2.3.3.掃描電鏡    11
2.3.4.拋光機    12
2.4試驗過程    12                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      上引連鑄銅鎂合金桿中心縮孔形成機理:http://www.aftnzs.live/cailiao/20190706/35426.html
------分隔線----------------------------
推薦內容
双色球走势图带连线