本文關(guān)鍵詞：旋鍛法制備WCu合金線材的工藝研究　出處：《西安理工大學(xué)》2010年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 鎢銅合金 線材 旋鍛 斷裂特性

【摘要】： 針對(duì)WCu假合金組元間熔點(diǎn)相差較大、體積含量相當(dāng)、彼此又難于形成中間相等特點(diǎn),采用常規(guī)的拉拔、擠壓、鍛造等工藝難以獲得線材的現(xiàn)狀。本文采用松裝熔滲的方法獲得了大長(zhǎng)徑比WCu合金坯材,并通過(guò)旋鍛將其加工成直徑4mm的線材。研究中通過(guò)電子掃描、X射線衍射等手段分析研究了不同溫度、不同變形量WCu合金線材的顯微組織和物理性能等,并在實(shí)驗(yàn)中完善了WCu合金旋鍛加工的工藝。結(jié)果表明： 1.采用熱旋鍛技術(shù)可以制備鎢銅合金線材,其最佳的旋鍛工藝是坯材旋鍛初始溫度為700-750℃,坯材變形量在達(dá)到25%之前,每組鍛模的加工量為0.4mm；變形量超過(guò)25%之后,每組鍛模的加工量為0.3mm。 2.利用本文開(kāi)發(fā)的旋鍛工藝,可制備出直徑為4mm、長(zhǎng)度為800mm、相對(duì)密度為98.16%、硬度為252HV、電導(dǎo)率為39.2%IACS,組織均勻、表面光潔的WCu25合金線材。 3.長(zhǎng)徑比大于50的WCu25坯材是通過(guò)松裝熔滲法獲得的。其過(guò)程是稱取一定量粒度組成的鎢銅混合粉末,裝入石墨模具中,加適當(dāng)壓力使得粉末之間接觸緊密,加足夠的補(bǔ)充銅塊放入燒結(jié)爐中于1350℃下,H2氣氛中進(jìn)行熔滲燒結(jié)獲得。 4.在一定的變形量范圍內(nèi),旋鍛可以有效的提高組織均勻性,細(xì)化晶粒,消除WCu合金中的Cu富集以及孔洞等缺陷,當(dāng)變形量達(dá)到30%-40%時(shí),可以使銅相在合金內(nèi)部形成細(xì)密、連貫的網(wǎng)絡(luò)狀結(jié)構(gòu)。WCu線材的電導(dǎo)率在各個(gè)旋鍛溫度下隨著變形量的變化都是先升高后降低。WCu線材的強(qiáng)度隨著變形量的增大而提高。變形量在0-30%范圍內(nèi),延伸率隨著變形量的增加而減小；變形量超過(guò)30%后,延伸率變化不大；在750℃下,變形量達(dá)到50%時(shí),WCu25線材的抗拉強(qiáng)度達(dá)到601MPa。
[Abstract]:For the WCu alloy component is much larger than the melting point, volume fraction, and it is difficult to form an intermediate equal each other, using conventional drawing, extrusion, forging and other processes is difficult to obtain the status of wire. In this paper, the ratio of length to diameter of WCu alloy billet with UNTAMPED infiltration, and processing the diameter 4mm wire by rotary forging. Research by electronic scanning, X ray diffraction analysis methods of different temperature and different deformation of WCu alloy wire on Microstructure and physical properties of WCu alloy, and improve the swaging process in the experiment. The results showed that:
1., the hot rotary forging technology can be used to prepare tungsten copper alloy wire. The best forging process is that the initial temperature of the forged material is 700-750 degrees, and the deformation of the blank reaches 25%. The processing volume of each forging die is 0.4mm. After the deformation is over 25%, the processing volume of each forging die is 0.3mm..
2., using the rotary forging process developed in this paper, we can prepare WCu25 alloy wire with a diameter of 4mm, a length of 800mm, a relative density of 98.16%, a hardness of 252HV, a conductivity of 39.2%IACS, a uniform structure and a smooth surface.
3. the diameter greater than 50 WCu25 billet by loose infiltration method. The process is called mixed tungsten copper powder take a certain amount of grain size composition, in graphite mold, with appropriate pressure to make close contact with powder, add enough copper pieces into the sintering furnace to below 1350 DEG C. H2 atmosphere in sintering.
4. in the amount of deformation within a certain range of rotary forging can effectively improve the uniformity of microstructure, grain refinement, elimination of WCu alloy Cu enrichment and defects such as holes, when the deformation rate reaches 30%-40%, the copper phase in the alloy can form fine conductivity, network structure of.WCu line coherence material in various spin forging temperature changes with the amount of deformation is increased at first and then increased with the increase of deformation decreases.WCu wire strength. The deformation in the range of 0-30%, the elongation decreases with the increase of deformation; deformation is more than 30%, little change in elongation; under 750 degrees, deformation amount to 50% the tensile strength of WCu25 wire, reached 601MPa.

【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2010
【分類號(hào)】：TG316

【引證文獻(xiàn)】

相關(guān)期刊論文 前3條

1 張輝;陳文革;;鎢銅板材的研究現(xiàn)狀與發(fā)展[J];材料導(dǎo)報(bào);2012年15期

2 張輝;陳文革;;鎢銅線材研究現(xiàn)狀[J];電工材料;2012年02期

3 張輝;陳文革;丁秉鈞;;熱旋鍛法制備的鎢銅線材的燒蝕性能[J];中國(guó)有色金屬學(xué)報(bào);2012年06期

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本文編號(hào)：1441341