本文選題：銅基粘結(jié)劑　切入點：鐵基胎體　出處：《鄭州大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：金剛石鋸片是一種常見的切削工具,尤其是在石材加工行業(yè),其應(yīng)用更是廣泛。金剛石鋸片由起切削作用的刀頭和起支撐刀頭作用的鋼基體組成。鐵基胎體刀頭因其制造成本較低、質(zhì)量較好而得到越來越廣泛的應(yīng)用。在金剛石鋸片使用過程中,金剛石鋸片刀頭中的金剛石脫落是金剛石鋸片最主要的失效形式。粘結(jié)劑是金剛石鋸片刀頭的重要組成部分,其主要作用是把金剛石與刀頭骨架材料粘結(jié)在一起,對防止金剛石的脫落具有重要意義。本文主要采用光學(xué)金相顯微鏡觀察、掃描電子顯微鏡觀察、能譜分析、X射線衍射分析的組織分析方法,以及致密度測試、硬度測試、抗彎強度測試等性能測試手段,對市場上廣泛應(yīng)用的銅錫15粘結(jié)劑進行了研究,并研究分析了銅錫15粘結(jié)劑與還原鐵粉形成的銅錫15粘結(jié)劑鐵基胎體中銅錫15粘結(jié)劑的添加量以及鐵基胎體的燒結(jié)溫度對鐵基胎體組織性能的影響;然后基于同樣的方法和手段對自制的銅鋅錫粘結(jié)劑進行了研究,并研究分析了銅鋅錫粘結(jié)劑的添加量以及銅鋅錫粘結(jié)劑鐵基胎體燒結(jié)溫度對鐵基胎體組織性能的影響。結(jié)果表明,隨著銅錫15粘結(jié)劑添加量的增多,鐵基燒結(jié)體中白色富銅相越來越多,灰色富鐵相越來越少,并且隨著銅錫15粘結(jié)劑含量的增多,鐵基燒結(jié)體致密度、硬度、抗彎強度均呈先增加后減少的趨勢。隨著溫度的升高,銅錫15粘結(jié)劑鐵基燒結(jié)體致密度越來越大,硬度和抗彎強度先增大后減小。銅錫15粘結(jié)劑鐵基燒結(jié)體在銅錫15粘結(jié)劑含量為25wt.%、燒結(jié)溫度為820℃時綜合性能最佳。隨著銅鋅錫粘結(jié)劑含量的增加,鐵基燒結(jié)體組織晶粒呈先減小后增大的趨勢,并在銅鋅錫粘結(jié)劑含量為20wt.%時,晶粒最細小。隨著銅鋅錫粘結(jié)劑含量增加,銅鋅錫粘結(jié)劑鐵基胎體的抗彎強度呈明顯的先上升后下降的趨勢,致密度和硬度均先升高最后趨于穩(wěn)定。隨著燒結(jié)溫度的升高,銅鋅錫粘結(jié)劑鐵基燒結(jié)體晶粒越來越粗大,致密度和硬度先稍微上升,之后趨于穩(wěn)定,抗彎強度一直呈降低趨勢。在銅鋅錫粘結(jié)劑含量為20wt.%、燒結(jié)溫度為780℃時銅鋅錫粘結(jié)劑鐵基胎體綜合性能最佳。與市場上應(yīng)用的銅錫15粘結(jié)劑相比,自制的銅鋅錫粘結(jié)劑在較少的添加量、較低的燒結(jié)溫度下即可達到最佳綜合性能。在兩種銅基粘結(jié)劑各自的最佳添加量和最佳燒結(jié)溫度下制成金剛石鋸片,對鋸片進行切削實驗,分析發(fā)現(xiàn),利用銅鋅錫粘結(jié)劑制作的金剛石鋸片刀頭中金剛石裸露高度較高、金剛石與鐵基胎體間的縫隙小,胎體對金剛石顆粒的把持力明顯高于銅錫15粘結(jié)劑胎體。
[Abstract]:Diamond saw blade is a common cutting tool, especially in stone processing industry. The diamond saw blade is composed of cutting head and steel substrate which supports the cutting head. In the process of using diamond saw blade, diamond shedding in diamond saw blade is the most important failure form of diamond saw blade, and binder is an important part of diamond saw blade head. Its main function is to bond diamond with the skeleton material of the knife head, which is of great significance to prevent the diamond from falling off. In this paper, optical metallographic microscope and scanning electron microscope are used to observe the diamond. The microstructure analysis method of X-ray diffraction analysis, density test, hardness test, bending strength test and so on, are studied on the copper-tin 15 binder, which is widely used in the market. The effect of the amount of copper-tin 15 binder and the sintering temperature of iron matrix on the microstructure and properties of iron matrix was studied. Then, based on the same method and means, the self-made copper-zinc-tin binder was studied. The effect of the amount of copper, zinc and tin binder and the sintering temperature of the iron matrix binder on the microstructure and properties of the iron matrix was studied. The results showed that with the increase of the amount of copper, zinc and tin binder, the effect of sintering temperature on the microstructure and properties of the iron matrix was studied. The white copper-rich phase and gray iron-rich phase are more and more in Fe-based sintered body, and with the increase of copper-tin 15 binder content, the iron-based sintered body becomes denser and harder. The flexural strength increased first and then decreased. With the increase of temperature, the density of the iron based sinter with copper and tin 15 binder increased. The hardness and flexural strength increased firstly and then decreased. The comprehensive properties of the iron based sintering body were the best when the content of copper tin 15 binder was 25 wt. and the sintering temperature was 820 鈩，

本文編號：1598030