新聞資訊
鍛造方法對(duì)TA15鈦合金組織和性能的影響
發(fā)布人：上海艾荔艾金屬材料有限公司www.85978597.cn
更新時(shí)間：2015-08-27
研究TA15鈦合金在等溫鍛造和普通模鍛兩種條件下大型鍛件組織的性能特征和熱處理工藝的影響。
鍛造方法對(duì)TA15鈦合金組織和性能的影響Effect of forging method on microstructure and mechanical
properties of TA15 titanium alloy
研究TA15鈦合金在等溫鍛造和普通模鍛兩種條件下大型鍛件組織的性能特征和熱處理工藝的影響。結(jié)果表明：等溫鍛件的室溫強(qiáng)度和沖擊韌性高于普通模鍛件的；等溫鍛件的500
℃高溫拉伸與斷裂韌性低于普通模鍛件的。兩種鍛件的熱處理工藝有以下特點(diǎn)：在900 ℃以前，隨退火溫度升高，其室溫強(qiáng)度增加，達(dá)到900
℃以后室溫強(qiáng)度隨退火溫度升高而降低。500 ℃下的高溫拉伸性能隨退火溫度升高，表現(xiàn)不同，普通模鍛件的隨退火溫度升高而增加，等溫鍛件的則在870
℃出現(xiàn)轉(zhuǎn)折現(xiàn)象。等溫鍛件比普通模鍛的組織更細(xì)。
The microstructure and properties of large forgings by
isothermal forging and common forging of TA15 titanium alloy before and after
heat treatment were studied. The results show that the tensile strength and
impact toughness of isothermal forgings at room temperature are higher than
those of common forgings, but they are conversed on fracture toughness and
tensile strength at 500 ℃. Tensile strength at room temperature increases with
increasing annealing temperature before 900 ℃ for large forging, and then
decrease with increasing temperature after 900 ℃. Tensile strength at 500 ℃ is
different for isothermal forgings and common forgings. The tensile strength at
500 ℃ increases with increasing annealing temperature for common forgings, but
increases and then decreases with the temperature increasing for isothermal
forgings, and the peak value occurs at 870 ℃. The microstructure of isothermal
forgings is finer than that of common forgings.
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