【摘要】：近些年,隨著我國公共基礎(chǔ)產(chǎn)業(yè)的蓬勃發(fā)展,在國民生活中,電纜及其導(dǎo)線成為國民生活基礎(chǔ)設(shè)施。鋁合金線纜應(yīng)用日益廣泛,但我國鋁合金纜線品種相對少,難以滿足現(xiàn)代電力更加苛刻的要求。本論文通過某線纜廠實踐現(xiàn)狀發(fā)現(xiàn)高強度鋁合金導(dǎo)線在生產(chǎn)過程中存在跳線、表面擦傷、單線斷裂缺股、過扭、鋁桿雜質(zhì)導(dǎo)致的單絲表面三角口等問題,擬采用向2024鋁合金添加不同含量鋰元素,通過實驗室對少量的鋁合金組織及電學(xué)性能研究,通過電阻爐熔煉、制樣,使用金相顯微鏡、SEM、拉伸壓力試驗機、顯微硬度計、霍爾測試系統(tǒng)等儀器測試其組織及電學(xué)性能。通過對不同鋰含量對2024鋁合金組織及電學(xué)性能的研究發(fā)現(xiàn),隨著鋰元素的添加,生成的Al_2CuLi相對合金硬度起到增強效果,經(jīng)過均勻化處理后,亞穩(wěn)定相Al_2CuLi相變?yōu)锳l_2Cu相,分散在晶界處,LaCl和NaHB6反應(yīng)生成LaB6,起到細化晶粒的作用;通過對其拉伸性能的測試,鋰元素的添加對合金的抗拉強度起到了促進作用,觀察試樣拉伸斷口掃描電鏡照片發(fā)現(xiàn)均為滑移開裂和沿晶斷裂的混合型斷裂,斷口處韌窩較深,延伸性較好;通過對其硬度的測試,鋰元素的添加提高合金硬度有提高作用;通過對其電學(xué)性能的測試,鋰元素的添加量為1.1%時,合金的導(dǎo)電性能優(yōu)良。通過鋰元素的添加,可以提高合金的機械性能,保證一定的導(dǎo)電性能,起到對線纜廠使用高強度合金鑄棒的性能改善作用,對新疆地區(qū)高強度鋁合金輸變電產(chǎn)業(yè)的發(fā)展具有促進意義。
[Abstract]:In recent years, with the rapid development of China's public basic industry, cables and wires have become the infrastructure of national life in the national life. Aluminum alloy cable is widely used, but the variety of aluminum alloy cable in China is relatively few, so it is difficult to meet the more demanding requirements of modern power. In this paper, through the practice of a cable factory, it is found that there are some problems in the production process of high strength aluminum alloy wire, such as jumper wire, surface scratch, single wire fracture and lack of strands, torsion, triangulation of single wire surface caused by aluminum rod impurity, and so on. By adding different lithium elements to 2024 aluminum alloy, the microstructure and electrical properties of a small amount of aluminum alloy were studied in laboratory. The microstructure and electrical properties of 2024 aluminum alloy were studied by means of electric resistance furnace melting, sample preparation, metallographic microscope, SEM, tensile pressure tester and microhardness tester. Hall test system and other instruments to test its structure and electrical properties. Through the study of the microstructure and electrical properties of 2024 aluminum alloy with different lithium content, it is found that with the addition of lithium, the Al_2CuLi can enhance the hardness of the alloy and be homogenized. The metastable Al_2CuLi phase is transformed into Al_2Cu phase and dispersed at grain boundaries. The reaction of LaCl and NaHB6 produces LaB6, to refine the grain. The tensile strength of the alloy was promoted by the addition of lithium element. The SEM photos of the tensile fracture of the alloy showed that the tensile fracture was mixed mode fracture with slip crack and intergranular fracture, and the dimple at the fracture surface was deep. Good extensibility; By testing the hardness of the alloy, the addition of lithium element can improve the hardness of the alloy, and the electrical properties of the alloy can be improved by testing the electrical properties of the alloy, and the electrical conductivity of the alloy is excellent when the addition of lithium element is 1.1. Through the addition of lithium element, the mechanical properties of the alloy can be improved, and the electrical conductivity can be guaranteed, which can improve the performance of the wire cable factory using high strength alloy casting rod. It will promote the development of high-strength aluminum alloy power transmission and transformation industry in Xinjiang.
【學(xué)位授予單位】：昌吉學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TG146.21

【參考文獻】

相關(guān)期刊論文 前9條

1 楊守杰;盧健;馮朝輝;李國愛;陸政;戴圣龍;;鋁鋰合金歷史回顧與在中國的研究發(fā)展[J];材料導(dǎo)報;2014年S2期

2 趙曉東;陶樂曉;王金亮;陳慧琴;劉建生;;新型高強鋁合金的熱變形行為及組織演變[J];稀有金屬材料與工程;2014年09期

3 黃崇祺;;電工用鋁和鋁合金在電纜工業(yè)中的應(yīng)用與前景[J];電線電纜;2013年02期

4 楊麗紅;孫小橋;鄧長勝;陳衛(wèi)東;;電纜測偏儀散熱器的溫度場穩(wěn)態(tài)熱分析[J];現(xiàn)代制造工程;2010年12期

5 楊守杰;楊霞;;高強度鋁合金的研究進展[J];粉末冶金工業(yè);2010年05期

6 宗曦華;張喜澤;;超導(dǎo)材料在電力系統(tǒng)中的應(yīng)用[J];電線電纜;2006年05期

7 黃崇祺,丁關(guān)森,李文浩,沈建華;我國電工鋁導(dǎo)線的研究和生產(chǎn)[J];電線電纜;2005年04期

8 黃崇祺;丁關(guān)森;沈建華;陳秀琴;方蓮華;;用稀土優(yōu)化綜合處理技術(shù)生產(chǎn)的電工鋁導(dǎo)體[J];電線電纜;1992年05期

9 黃崇祺;儲成著;丁關(guān)森;沈建華;;鋁導(dǎo)體的硼化處理[J];上海金屬;1987年03期

，

本文編號：2297737