發(fā)布時間：2018-05-20 07:16

  本文選題：30CrMo鋼 + CSP工藝��； 參考：《武漢科技大學》2016年碩士論文

【摘要】：CSP工藝(即:緊湊式熱帶生產工藝)具有流程短,成本低,產品質量好等特點,能夠有效改善傳統(tǒng)流程所存在的一些問題,逐漸被推廣用于生產各種中高碳鋼產品。為了生產高附加值產品,追求更高的經濟效益,研究CSP生產中高碳鋼技術具有重要意義。本文以武鋼CSP工藝生產的30CrMo鋼為對象,研究了加熱溫度、保溫時間以及加熱氣氛對30CrMo鋼表面脫碳的影響規(guī)律。研究表明:加熱溫度范圍為1000-1150℃,保溫時間為15-60min,加熱氣氛為16.5%CO_2,0.8%O_2,13%H_2O,69.7%N_2的情況下,30CrMo鋼的脫碳層厚度隨著溫度的升高出現(xiàn)了先增加后減小再又增大的趨勢,1050℃為30CrMo鋼的脫碳敏感溫度。保溫時間越長,脫碳層越厚。以CSP均熱爐內氣氛為基礎,改變O_2,CO_2,H_2O的含量都會對30Cr Mo鋼的脫碳有不同的影響。在15.8%CO_2+0.83%O_2+83.3%N_2、16.5%CO_2+0.8%O_2+13%H_2O+69.7%N_2、14.3%H_2O+85.7%N_2三種混合氣氛中加熱,14.3%H_2O+85.7%N_2混合氣氛能夠有效降低30Cr Mo鋼脫碳層厚度。利用菲克第二定律建立脫碳動力學模型,以反應的吉布斯自由能變化為基礎建立脫碳熱力學模型,模型計算結果表明:增加加熱溫度和延長保溫時間都會使理論脫碳層厚度增加。修正脫碳計算模型要考慮氧化對脫碳層的燒損。
[Abstract]:CSP process (i.e. compact tropical production process) has the characteristics of short process, low cost and good product quality. It can effectively improve some problems existing in the traditional process and has been gradually popularized to produce all kinds of medium and high carbon steel products. In order to produce high value-added products and pursue higher economic benefits, it is of great significance to study the technology of high carbon steel in CSP production. In this paper, the effect of heating temperature, holding time and heating atmosphere on surface decarburization of CSP steel produced by WISCO was studied. The results show that the decarburization thickness of 30CrMo steel increases first and then decreases and then increases with the increase of temperature. The heating temperature range is 1000-1150 鈩，

本文編號：1913681