電拋光具體分析
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發布時間 : 2015-12-31
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摘要:山(shan)東金(jin)屬表面處理(li)電拋(pao)光具體分析
山東(dong)金(jin)屬表面(mian)處理電(dian)拋光開(kai)始的(de)(de)(de)(de)(de)一段時間(jian)(jian)內,整(zheng)平速度(du)(du)較大,隨(sui)后則逐漸減(jian)緩(huan),甚至會損(sun)害(hai)表面(mian)已出現的(de)(de)(de)(de)(de)光潔度(du)(du)。隨(sui)著電(dian)流密(mi)度(du)(du)與溫度(du)(du)的(de)(de)(de)(de)(de)提高(gao),電(dian)拋光的(de)(de)(de)(de)(de)時間(jian)(jian)應當縮短(duan)。山東(dong)金(jin)屬表面(mian)處理為(wei)了(le)獲得(de)光潔度(du)(du)較高(gao)的(de)(de)(de)(de)(de)表面(mian),常(chang)可采(cai)用(yong)反復(fu)幾次(ci)拋光的(de)(de)(de)(de)(de)辦法,而(er)每次(ci)拋光的(de)(de)(de)(de)(de)時間(jian)(jian)則不要太長。 鋁(lv)及(ji)其合金(jin)的(de)(de)(de)(de)(de)電(dian)拋光,早先多是(shi)采(cai)用(yong)磷酸-硫酸溶(rong)液,近來發(fa)展為(wei)向上述溶(rong)液中(zhong)添(tian)加少量鉻酸酐。山東(dong)金(jin)屬表面(mian)處理鋁(lv)材的(de)(de)(de)(de)(de)純(chun)度(du)(du)越高(gao),拋光的(de)(de)(de)(de)(de)效果也就越好。
山(shan)東金(jin)(jin)屬(shu)(shu)表(biao)(biao)(biao)面(mian)處(chu)理電(dian)(dian)拋(pao)光(guang),是在特定的(de)溶液中進行陽極電(dian)(dian)解,使(shi)金(jin)(jin)屬(shu)(shu)表(biao)(biao)(biao)面(mian)處(chu)理平滑(hua)并(bing)產生金(jin)(jin)屬(shu)(shu)光(guang)澤的(de)工(gong)藝過程。電(dian)(dian)拋(pao)光(guang)時,零(ling)件接陽極,通電(dian)(dian)時零(ling)件表(biao)(biao)(biao)面(mian)會產生電(dian)(dian)阻率高(gao)的(de)稠性粘膜,其厚度(du)(du)在零(ling)件表(biao)(biao)(biao)面(mian)是不均(jun)勻(yun)的(de)。山(shan)東金(jin)(jin)屬(shu)(shu)表(biao)(biao)(biao)面(mian)處(chu)理微觀凸出部分較(jiao)(jiao)(jiao)薄,電(dian)(dian)流(liu)密(mi)(mi)度(du)(du)較(jiao)(jiao)(jiao)大,金(jin)(jin)屬(shu)(shu)溶解較(jiao)(jiao)(jiao)快,表(biao)(biao)(biao)面(mian)微觀下凹處(chu)較(jiao)(jiao)(jiao)厚,電(dian)(dian)流(liu)密(mi)(mi)度(du)(du)較(jiao)(jiao)(jiao)小(xiao),金(jin)(jin)屬(shu)(shu)溶解較(jiao)(jiao)(jiao)慢。由于山(shan)東金(jin)(jin)屬(shu)(shu)表(biao)(biao)(biao)面(mian)處(chu)理稠性粘膜和電(dian)(dian)流(liu)密(mi)(mi)度(du)(du)分布(bu)不均(jun)勻(yun)性,微觀凸出處(chu)尺(chi)寸較(jiao)(jiao)(jiao)少快,微觀下凹處(chu)尺(chi)寸減少慢,使(shi)零(ling)件表(biao)(biao)(biao)面(mian)粗(cu)糙度(du)(du)降低,從而(er)達到了整平的(de)目的(de)。
電拋光常(chang)用(yong)于剛(gang)、不銹鋼、鋁、銅等零(ling)件,或銅、鎳等鍍層的(de)(de)裝飾(shi)性精(jing)加工(gong),用(yong)于山(shan)東金(jin)(jin)屬(shu)表(biao)(biao)(biao)面(mian)(mian)(mian)處(chu)理工(gong)具(ju)的(de)(de)表(biao)(biao)(biao)面(mian)(mian)(mian)精(jing)加工(gong),可(ke)提高(gao)山(shan)東金(jin)(jin)屬(shu)表(biao)(biao)(biao)面(mian)(mian)(mian)處(chu)理切削刀具(ju)的(de)(de)壽命(ming),顯示(shi)零(ling)件表(biao)(biao)(biao)面(mian)(mian)(mian)的(de)(de)裂紋、砂眼、夾雜等缺陷,用(yong)于山(shan)東金(jin)(jin)屬(shu)表(biao)(biao)(biao)面(mian)(mian)(mian)處(chu)理制造高(gao)度反光的(de)(de)表(biao)(biao)(biao)面(mian)(mian)(mian),除去零(ling)件的(de)(de)毛刺和制備金(jin)(jin)相磨片。