Ti-44528s合金的开发及其在潜水刀具中的应用

Ti-44528s合金是新开发研制的刀具用钛合金,它是一种加入8种合金元素的亚稳态β型钛合金。运用此β型钛合金和多级时效处理工艺制造出的海军潜水刀,锋利无比,且具有耐腐蚀、质量轻等多种优点,其性能为:σb≥1650MPa,σ0.2≥1600MPa,σ5≥4%,HRC≥50。

LCH β型Ti-44528S合金板材的开发与应用

新型 L CHβ型 Ti- 445 2 8S合金是一种加入了 8种合金化元素的亚稳钛合金。对其板材的生产工艺及性能研究表明 ,冷轧板材经多级时效处理后 ,硬度高于 HRC5 3;其板材经固溶和多级时效处理 ,σb≥ 165 0 MPa,σ0 .2 ≥ 160 0 MPa,δ≥ 4 %。该合金已用作海军潜水刀材料。

时效对LCHβ型Ti-44528S合金硬度的影响

研究了时效对LCHβ型Ti-44528S合金硬度的影响,结果表明:经多级时效处理,使合金得到了明显的弥散强化,合金HRC硬度高达50.

Microstructure and tensile properties of Ti-62421S alloy plate with different annealing treatments

Ti-62421S （Ti-6A1-2Sn-4Zr-2Nb-lMo-0.2Si） is a novel short-time using high-temperature titanium alloy. The effects of annealing on microstructure and tensile properties of Ti-62421S alloy plate were studied through optical microscopy （OM）, electron probe microanalysis （EPMA）, transmission electron microscopy （TEM）, and tensile tests. The results show that, with annealing tem- perature increasing, the volume fraction of primary α（αp）- phase decreases while that of transformed β（βt）-structure and secondary α （αs）-phase increases. The room-temperature strength and plasticity are insensitive to annealing temperature. However, with annealing temperature increasing, the tensile strength decreases at 550℃, while increases at 600 and 650℃ instead. It is suggested that, at 550℃, the strengthening mechanism is mainly boundary strengthening and the biggest contributor is ap-phase by providing αp/β-boundary area. Above 600 ℃, the strengthening mechanism is grain strengthening, where αs-phase strengthens the β-phase.