(1. 中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室,長(zhǎng)沙 410083;
2. 中南大學(xué) 材料科學(xué)與工程學(xué)院, 長(zhǎng)沙 410083)
摘 要: 根據(jù)金屬材料的切削機(jī)理和銅合金的基本性質(zhì), 闡述無(wú)鉛易切削銅合金成分選擇的基本思路, 提出以彌散分布的金屬間化合物代替易切削鉛黃銅中的鉛或無(wú)鉛鉍黃銅中的鉍, 從而實(shí)現(xiàn)易切削黃銅的無(wú)鉛化。 詳細(xì)介紹國(guó)外無(wú)鉛易切削鉍黃銅研究開(kāi)發(fā)的一些成果和石墨/銅合金復(fù)合材料的研究情況, 總結(jié)國(guó)內(nèi)無(wú)鉛易切削銅合金的研究情況, 結(jié)合自己的研究結(jié)果, 指出無(wú)鉛易切削銅合金的研究方向是采用適當(dāng)?shù)脑匦纬纱喽挥驳慕饘匍g化合物, 并采用一定的加工手段使其呈彌散分布。
關(guān)鍵字: 無(wú)鉛; 易切削; 銅合金; 鉛; 鉍; 金屬間化合物
(1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. School of Materials Science and Engineering, Central South University, Changsha 410083, China)
Abstract: The principles of elements choice of lead free cutting brass was expatiated.It was pointed out that the lead in lead-brass or bismuth in bismuth-brass is replaced by dispersive intermetallics.The development of the lead free cutting brass containing bismuth and graphite/copper composite was summarized.It can be concluded that the key points for cutting brass containing no lead are the choices of elements which can form brittle but not hard intermetallics and procedure which can make the intermetallics distribute dispersively.
Key words: lead free; cutting; copper alloy; Pb; Bi; intermetallics


