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高強(qiáng)鈦合金擠壓管材的組織及性能
發(fā)布人：上海艾荔艾金屬材料有限公司www.bt990.com.cn
更新時(shí)間：2015-08-28
對(duì)亞穩(wěn)β高強(qiáng)鈦合金Ti-1300管材擠壓成形進(jìn)行了研究，分析并測(cè)試了擠壓管材在不同熱處理制度下的組織及力學(xué)性能，并采用掃描電鏡對(duì)拉伸試樣斷口形貌特征進(jìn)行了觀察。
高強(qiáng)鈦合金擠壓管材的組織及性能Microstructure and mechanical properties of high strength
titanium alloy extruded tube
對(duì)亞穩(wěn)β高強(qiáng)鈦合金Ti-1300管材擠壓成形進(jìn)行了研究，分析并測(cè)試了擠壓管材在不同熱處理制度下的組織及力學(xué)性能，并采用掃描電鏡對(duì)拉伸試樣斷口形貌特征進(jìn)行了觀察。研究結(jié)果表明，Ti-1300亞穩(wěn)β鈦合金通過選擇合適的擠壓工藝參數(shù)可以制備出高質(zhì)量管材，擠壓態(tài)管材經(jīng)860
℃固溶處理后組織為完全β相單相組織，斷口布滿韌窩，具有較高的塑性，有利于進(jìn)一步冷軋變形；560
℃時(shí)效后為等軸β晶粒內(nèi)彌散分布針狀α相，斷口為韌脆混合斷口，強(qiáng)度可達(dá)1 310 MPa，伸長率為8%。
The extrusion forming of metastable β high strength
titanium alloy Ti-1300 tube was studied. The room-temperature tensile properties
were tested and the microstructures of specimens were characterized. The
fractographs of tensile specimens were observed by SEM. The results show that,
the high quality extruded tubes of high strength titanium alloy Ti-1300 are
manufactured with suitable parameters. The extruded tube after ST 860 ℃ consists
of only β phases and has plastic dimple fracture surface. The ductility of raw
extruded and solution state tubes is excellent, which is advantageous to deep
deformation process. The extruded tubes of Ti-1300 alloy after aging treatment
are composed of diffusion acicular α phase and β matrix and have plastic and
brittle mixed fracture surface. Their strength reaches 1 310 MPa and the
elongation is 8%.
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