本文關(guān)鍵詞： 鎢極氬弧熔敷 陶瓷熔覆層 物相 熱力學(xué)預(yù)測(cè)　出處：《焊接學(xué)報(bào)》2017年05期 　論文類型：期刊論文

【摘要】：利用熱力學(xué)原理推導(dǎo)出反應(yīng)焓和反應(yīng)吉布斯(Gibbs)自由能與溫度的關(guān)系式.根據(jù)Ti-Si-C系相圖,對(duì)用鎢極氬弧(TIG)熱在鈦合金表面熔敷形成涂層過(guò)程中可能的12個(gè)化學(xué)反應(yīng)進(jìn)行熱力學(xué)分析.熱力學(xué)計(jì)算得出,Ti元素能與SiC,Si及C元素反應(yīng)生成TiC,Ti_3SiC_2相和Ti_5Si_3,TiSi_2金屬間化合物.理論分析結(jié)果表明,在TIG熔敷條件下,通過(guò)改變不同的原材料初始組成,可以采用熱力學(xué)分析方法預(yù)測(cè)熔覆層的物相組成.試驗(yàn)結(jié)果表明,預(yù)測(cè)結(jié)果與試驗(yàn)結(jié)果符合得很好.
[Abstract]:The relationship between the reaction enthalpy and the Gibbs Gibbs free energy and the temperature is derived from the thermodynamic principle. According to the phase diagram of the Ti-Si-C system, the relationship between the reaction enthalpy and the reaction Gibbs free energy is derived. Twelve possible chemical reactions in the process of coating titanium alloy surface by TIG heat were analyzed. The thermodynamic calculation showed that the Ti element could interact with SiC. The reaction of Si and C produces TiCX Ti3SiC2 and Ti5Si3TiSi2 intermetallic compounds. Theoretical analysis shows that under the condition of TIG cladding. The thermodynamic analysis method can be used to predict the phase composition of the cladding by changing the initial composition of different raw materials. The experimental results show that the predicted results are in good agreement with the experimental results.
【作者單位】： 武漢科技大學(xué)鋼鐵冶金及資源利用省部共建教育部重點(diǎn)實(shí)驗(yàn)室;武漢大學(xué)動(dòng)力與機(jī)械學(xué)院;
【基金】：湖北省教育廳青年基金資助項(xiàng)目(010403)
【分類號(hào)】：TG174.4
【正文快照】： 0序言鎢極氬弧熔敷方法使用純度為99.99%的氬氣作為保護(hù)氣體,惰性氣體不參與化學(xué)反應(yīng),使得物質(zhì)之間的相互作用相對(duì)簡(jiǎn)單一些.孟君晟等人[1]采用了氬弧熔敷技術(shù)對(duì)鈦合金表面改性,原位自生形成Ti C+Ti B2/Ti復(fù)合涂層,涂層的顯微硬度較基體提高了4.5倍.然而,在電弧熔敷過(guò)程中,焊接，

本文編號(hào)：1456698