本文關(guān)鍵詞：Cu-Cr-Zr-Fe-P合金組織與性能的研究　出處：《南昌航空大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 點焊電極 熱處理工藝 Cu-Cr-Zr合金 Fe P 硬度 導(dǎo)電率 軟化溫度

【摘要】：本文在傳統(tǒng)點焊電極用Cu-Cr-Zr合金的基礎(chǔ)上,添加Fe、P元素,通過多元復(fù)合強化方法提高電極用銅合金的綜合性能。實驗設(shè)計了Cu-0.6Cr-0.15Zr、Cu-0.6Cr-0.15Zr-2.5Fe、Cu-0.6Cr-0.15Zr-2.5Fe-0.06P、Cu-0.6Cr-0.15Zr-0.12Fe-0.06P四種不同成分合金。研究Cu-Cr-Zr-Fe-P合金在不同熱處理工藝下組織與性能的變化,主要結(jié)果如下:(1)鑄態(tài)下,在Cu-0.6Cr-0.15Zr合金中添加Fe,合金硬度有所上升,導(dǎo)電率有所下降。Fe元素的添加可以細化Cu-0.6Cr-0.15Zr合金的晶粒,添加2.5wt%Fe使Cu-0.6Cr-0.15Zr合金基體組織由柱狀晶轉(zhuǎn)變?yōu)榈容S晶。添加0.06wt%P對合金組織與性能影響不大。(2)研究不同固溶溫度對Cu-0.6Cr-0.15Zr-2.5Fe-0.06P合金組織與性能的影響發(fā)現(xiàn),固溶溫度在900℃~980℃時,合金導(dǎo)電率隨固溶溫度上升而下降,硬度隨固溶溫度上升而上升。980℃固溶2h,導(dǎo)電率和硬度分別為26%IACS和93.44HV。不同成分合金980℃固溶2h的性能與鑄態(tài)相比,導(dǎo)電率均有所下降,Cu-0.6Cr-0.15Zr和Cu-0.6Cr-0.15Zr-0.12Fe-0.06P合金硬度有所下降,而Cu-0.6Cr-0.15Zr-2.5Fe和Cu-0.6Cr-0.15Zr-2.5Fe-0.06P合金,因過剩相溶解造成的固溶強化超過了過剩相溶解導(dǎo)致的軟化,硬度相比鑄態(tài)有所上升。(3)研究不同成分合金980℃固溶2h后不同時效時間與時效溫度下的組織與性能發(fā)現(xiàn),添加0.12wt%Fe的Cu-0.6Cr-0.15Zr-0.12Fe-0.06P合金,時效析出相主要成分是是以Cr為主的(CrZrFeP)化合物和(CrZrP)化合物,在500℃X3h的較佳時效工藝下,硬度值可達154.76HV,導(dǎo)電率可達76.2%IACS,軟化溫度在603℃左右,與較佳時效工藝下的Cu-0.6Cr-0.15Zr合金性能相比,硬度和軟化溫度有所上升,導(dǎo)電率有所下降。添加2.5wt%Fe的Cu-0.6Cr-0.15Zr-2.5Fe-0.06P合金,時效態(tài)存在較多粗大的析出相,其成分主要是以Fe為主的(CrFe)化合物和(CrZrFe P)化合物,以及百分含量相近的(CrFeP)化合物,其時效強化效果不佳,較佳時效工藝下的導(dǎo)電率和硬度均低于Cu-0.6Cr-0.15Zr合金。添加0.06wt%P對合金時效性能影響不大。不同成分合金在不同時效工藝下的整體變化規(guī)律為:隨時效時間的延長,析出相增多、長大,導(dǎo)電率逐漸上升,最終趨于平穩(wěn),硬度先上升,達到硬化峰值后下降。時效溫度升高,析出相快速析出、長大、粗化,導(dǎo)電率快速上升,到達硬化峰值所需時間變短。(4)對比Cu-0.6Cr-0.15Zr-2.5Fe-0.06P合金鑄態(tài)+時效與980℃X2h固溶+時效處理工藝下的組織和性能發(fā)現(xiàn),該合金經(jīng)固溶+時效處理后析出相分布更均勻,硬度更高,但兩者導(dǎo)電率相差不大。
[Abstract]:On the basis of the traditional spot welding electrode for Cu-Cr-Zr alloy based on the addition of Fe, P elements, through the comprehensive performance of multielement composite strengthening method to improve copper alloy electrode. The experimental design of Cu-0.6Cr-0.15Zr, Cu-0.6Cr-0.15Zr-2.5Fe, Cu-0.6Cr-0.15Zr-2.5Fe-0.06P, Cu-0.6Cr-0.15Zr-0.12Fe-0.06P four kinds of alloy. Study on change of microstructure and properties of Cu-Cr-Zr-Fe-P alloy in different heat treatment processes, mainly the results are as follows: (1) cast, adding Fe in Cu-0.6Cr-0.15Zr alloy, the hardness of the alloy increased, the conductivity decreased by addition of.Fe can refine the grain of Cu-0.6Cr-0.15Zr alloy, the microstructure of Cu-0.6Cr-0.15Zr alloy with 2.5wt%Fe transition from columnar crystal to equiaxed crystal. Adding 0.06wt%P has little effect on the structure and properties of alloy. (2) to study the effect of different solid solution on Microstructure and properties of Cu-0.6Cr-0.15Zr-2.5Fe-0.06P alloy temperature Find the solution temperature at 900 DEG ~980 DEG, alloy conductivity decreases with the increase of solution temperature, hardness with solution temperature increased.980 C 2H in solution, compared the hardness and conductivity properties of 26%IACS and 93.44HV. respectively for different components of alloy 980 DEG 2H solid solution and cast, conductive rate decreased, hardness of Cu-0.6Cr-0.15Zr alloy and Cu-0.6Cr-0.15Zr-0.12Fe-0.06P alloy decreased, while Cu-0.6Cr-0.15Zr-2.5Fe and Cu-0.6Cr-0.15Zr-2.5Fe-0.06P alloy, solid solution strengthening over the solution of excess phase leads to softening due to excess phase solubility, hardness compared to the casting increased. (3) of different components of alloy 980 DEG 2H solid solution after different aging time and aging temperature of the organization the performance of Cu-0.6Cr-0.15Zr-0.12Fe-0.06P and found that 0.12wt%Fe added alloy, precipitation is the main component is mainly based on Cr (CrZrFeP) and compound (CrZrP) compounds, In the preferred aging process 500 DEG X3h, the hardness can reach 154.76HV, the conductivity can reach 76.2%IACS, the softening temperature at 603 degrees Celsius, the properties of Cu-0.6Cr-0.15Zr alloy with better ageing processes than hardness and softening temperature increased, the conductivity decreased. Cu-0.6Cr-0.15Zr-2.5Fe-0.06P alloy with 2.5wt% Fe, there are more precipitation and aging the coarse phase, its composition is mainly dominated by Fe (CrFe) and compound (CrZrFe P) compounds, and percentage of similar compounds (CrFeP), the aging strengthening effect is poor, the better aging process under the conductivity and hardness of the alloy is lower than that of Cu-0.6Cr-0.15Zr. Adding 0.06wt%P has little effect on the aging properties of the alloy. The overall variation in different aging process under different composition alloy: with the prolongation of aging time, precipitation increased, the conductivity increased gradually grew up, the final hardness tends to be steady. First up, reach the hardening peak and then decreased. The increase of aging temperature, precipitation phase rapid precipitation, growth, coarsening, the conductivity increased rapidly, reaching the peak hardening are shorter. (4) compared with the Cu-0.6Cr-0.15Zr-2.5Fe-0.06P alloy casting + aging and 980 DEG X2h solid solution + aging process of microstructure and properties, the alloy after solid solution and aging treatment after precipitation phase distribution is more uniform, higher hardness, but the conductivity has little difference.

【學(xué)位授予單位】：南昌航空大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TG146.11

【參考文獻】

相關(guān)期刊論文 前1條

1 陸磊;張安南;鄒晉;陳志寶;胡強;;高強高導(dǎo)電銅合金耐蝕性研究[J];材料工程;2010年04期

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本文編號：1396017