新聞資訊
C89320無鉛鉍青銅的組織及力學性能
發(fā)布人：上海艾荔艾金屬材料有限公司m.85978597.cn
更新時間：2015-10-21
采用OPM、SEM及EDS等檢測手段研究C89320無鉛鉍青銅宏觀、微觀組織特征及力學性能。
C89320無鉛鉍青銅的組織及力學性能Microstructure and mechanical properties of C89320 lead-free bismuth tin bronze
采用OPM、SEM及EDS等檢測手段研究C89320無鉛鉍青銅宏觀、微觀組織特征及力學性能。結(jié)果表明：該合金以連鑄方式生產(chǎn)，顯微組織由α相、富磷α相、粒狀金屬鉍和Cu3P組成。粒狀金屬鉍和Cu3P只在富磷α相內(nèi)生成，其分布、形態(tài)、數(shù)量和大小與富磷α相成分有關(guān)。鑄態(tài)下，該合金的屈服強度為148 MPa、抗拉強度為300 MPa、斷后伸長率為36.5%、硬度為70.5 HBW、抗壓強度為146 MPa、夏比沖擊吸收能量為28 J。常溫沖擊斷口呈韌窩狀，具有良好的切削加工性能。
The macrostructure, microstructure and mechanical properties of C89320 lead-free bismuth tin bronze were investigated by OPM, SEM and EDS techniques. The results show that when the C89320 is fabricated by continuous casting process, the microstructure mainly contains α phase, phosphorus-rich α phase, particle-like Bi and Cu3P phases. Bi and Cu3P phases are associated with the phosphorus-rich α phase, whose morphology, size and number are related to the composition of the phosphorus-rich α phase. The yield strength, tensile strength, elongation, hardness, compressive strength and impact energy of the as-cast alloy are 148 MPa, 300 MPa, 36.5%, 70.5 HBW, 146 MPa, and 28 J, respectively. The impact fracture at the room temperature is typical dimple fracture pattern and the alloy has excellent cutting machinability.
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