本文選題：強流脈沖電子束 + YG20硬質(zhì)合金　； 參考：《遼寧工程技術(shù)大學(xué)》2015年碩士論文

【摘要】：硬質(zhì)合金在工業(yè)各個領(lǐng)域都有廣泛應(yīng)用,因其在比較惡劣的環(huán)境中服役,容易發(fā)生磨損、腐蝕及斷裂等破壞。為提高硬質(zhì)合金的使役性能和使用壽命,最常用的方法就是對其進(jìn)行表面改性處理。實驗對YG20硬質(zhì)合金進(jìn)行強流脈沖電子束(HCPEB)表面改性處理,在加速電壓23.4kV、脈沖寬度2.5μs的條件下分別對YG20合金進(jìn)行3、5、10、15、25、35次輻照處理,通過SEM、XRD、EPMA、TEM和表面粗糙度等分析測試技術(shù)來表征處理后表面微觀結(jié)構(gòu)發(fā)生的變化情況,通過顯微硬度、耐磨性及耐蝕性測試技術(shù)來表征處理后材料表面性能的變化情況。HCPEB處理后,表面誘發(fā)形成熔坑和微裂紋形貌。相結(jié)構(gòu)改變,形成納米尺寸的新相WC1-X、Co3W3C、Co3W9C4和石墨。25次處理時,表面粗糙度、顯微硬度和耐磨性性能最佳,表面粗糙度由0.521μm降至0.09μm,顯微硬度從基體的1170.6HV提高至1359HV,耐磨性提高了2.11倍。10次處理時,耐蝕性能最佳,自腐蝕電流密度從基體的17.25μA/cm2降至2.433μA/cm2;25次處理后的耐蝕性是基體的3.55倍,自腐蝕電流密度值為從基體的17.25μA/cm2降至4.860μA/cm2。HCPEB可以有效改善YG20硬質(zhì)合金的表面質(zhì)量、顯微硬度、耐磨性以及耐蝕性,其中,25次HCPEB輻照處理獲得的改性效果最佳。
[Abstract]:Cemented carbides are widely used in various fields of industry, because of their service in harsh environments, they are prone to wear, corrosion and fracture. In order to improve the mechanical properties and service life of cemented carbides, surface modification is the most commonly used method. The surface of YG20 cemented carbide was modified by high current pulsed electron beam (YG20). Under the condition of accelerated voltage of 23.4kV and pulse width of 2.5 渭 s, the YG20 alloy was irradiated for three times. The changes of surface microstructure after treatment were characterized by means of SEM XRDX EPMA TEM and surface roughness analysis, and the changes of surface properties after treatment were characterized by microhardness, wear resistance and corrosion resistance. The surface induced melting pits and microcracks were formed. The surface roughness, microhardness and wear resistance of nano-sized new phase WC1-XC3W3Co3W9C4 and graphite were the best when the phase structure was changed. The surface roughness was reduced from 0.521 渭 m to 0.09 渭 m, and the microhardness was increased from 1170.6HV of the substrate to 1359HV.The wear resistance of the substrate was improved by 2.11 times .10 times, and the corrosion resistance was 3.55 times of that of the substrate after the corrosion current density was reduced from 17.25 渭 A/cm2 of the substrate to 2.433 渭 A / cm ~ (2) C _ (2), and the corrosion resistance of the substrate was increased from 0.521 渭 m to 0.09 渭 m. The surface quality, microhardness, wear resistance and corrosion resistance of YG20 cemented carbides can be effectively improved by reducing the corrosion current density from 17.25 渭 A/cm2 to 4.860 渭 A/cm2.HCPEB of the matrix. Among them, 25 times of HCPEB irradiation treatment has the best effect on the surface quality, wear resistance and corrosion resistance of YG20 cemented carbides.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TG174.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 潘鑫;馬志斌;李國偉;曹為;王傳新;付秋明;;氧等離子體刻蝕CVD金剛石膜的影響機(jī)理[J];強激光與粒子束;2014年07期

2 郝勝智;徐洋;張悅;董闖;;強流脈沖電子束輻照YG6X硬質(zhì)合金表層組織與性能研究[J];真空科學(xué)與技術(shù)學(xué)報;2014年01期

3 況軍;王巖;;強流脈沖電子束表面改性TA15鈦合金的耐磨耐蝕性能[J];熱處理技術(shù)與裝備;2013年01期

4 王曉彤;彭冬晉;鄒陽;萬明珍;蔡杰;關(guān)慶豐;;表面狀態(tài)對強流脈沖電子束輻照誘發(fā)金屬表面熔坑的影響[J];高壓物理學(xué)報;2013年01期

5 王世興;熊碧軍;李聰;田修波;楊士勤;;YG8硬質(zhì)合金表面的C+V雙離子注入研究[J];哈爾濱工業(yè)大學(xué)學(xué)報;2011年07期

6 曹輝;郝儀;孫樹臣;高波;涂贛峰;崔建忠;;電子束表面改性對鎂合金耐磨性的影響[J];輕金屬;2011年04期

7 郝勝智;徐洋;賀冬云;董闖;;強流脈沖電子束輻照YG8硬質(zhì)合金的組織與性能[J];金屬熱處理;2011年03期

8 王世興;熊碧軍;田修波;楊士勤;;C+Cr離子注入對硬質(zhì)合金的表面改性[J];熱加工工藝;2011年04期

9 胡建軍;陳元芳;許洪斌;金鐵玉;;強流脈沖電子束照射下40Cr的表面形貌及XRD分析[J];熱加工工藝;2010年04期

10 王瑾;邵揚;梁亮;關(guān)慶豐;;純鋁脈沖電子束處理后噴射型火山坑形貌成因[J];熱加工工藝;2010年02期

，

本文編號：1868400