钛工业进展
鈦工業進展
태공업진전
TAI GONGYE JINZHAN
2014年
2期
16-19
,共4页
王清瑞%沙爱学%黄利军%李兴无
王清瑞%沙愛學%黃利軍%李興無
왕청서%사애학%황리군%리흥무
Ti-55531合金%固溶加时效%β退火%显微组织%力学性能
Ti-55531閤金%固溶加時效%β退火%顯微組織%力學性能
Ti-55531합금%고용가시효%β퇴화%현미조직%역학성능
Ti-55531 titanium alloy%solution and aging%βannealing%microstructure%mechanical property
通过采用不同的热处理制度研究了时效温度和β退火温度对Ti-55531合金显微组织和力学性能的影响。结果表明: Ti-55531合金固溶加时效处理后可获得初生α相呈长条或等轴状的组织,β基体上大量析出的次生α相使其获得较高的强度,且强度随时效温度升高而显著降低,延伸率变化不明显,断面收缩率在620℃以上随着时效温度升高有所增加,但该组织状态断裂韧度偏低;β退火后可获得均匀的片状组织,具有较高的断裂韧性,抗拉强度在600~650℃之间随退火温度升高呈线性关系降低,可根据需要很方便地调整强度级别,塑性随退火温度升高变化不太明显。
通過採用不同的熱處理製度研究瞭時效溫度和β退火溫度對Ti-55531閤金顯微組織和力學性能的影響。結果錶明: Ti-55531閤金固溶加時效處理後可穫得初生α相呈長條或等軸狀的組織,β基體上大量析齣的次生α相使其穫得較高的彊度,且彊度隨時效溫度升高而顯著降低,延伸率變化不明顯,斷麵收縮率在620℃以上隨著時效溫度升高有所增加,但該組織狀態斷裂韌度偏低;β退火後可穫得均勻的片狀組織,具有較高的斷裂韌性,抗拉彊度在600~650℃之間隨退火溫度升高呈線性關繫降低,可根據需要很方便地調整彊度級彆,塑性隨退火溫度升高變化不太明顯。
통과채용불동적열처리제도연구료시효온도화β퇴화온도대Ti-55531합금현미조직화역학성능적영향。결과표명: Ti-55531합금고용가시효처리후가획득초생α상정장조혹등축상적조직,β기체상대량석출적차생α상사기획득교고적강도,차강도수시효온도승고이현저강저,연신솔변화불명현,단면수축솔재620℃이상수착시효온도승고유소증가,단해조직상태단렬인도편저;β퇴화후가획득균균적편상조직,구유교고적단렬인성,항랍강도재600~650℃지간수퇴화온도승고정선성관계강저,가근거수요흔방편지조정강도급별,소성수퇴화온도승고변화불태명현。
The influence of aging and βannealing temperatures on microstructure and mechanical properties of Ti-55531 titanium alloy were studied .The results show that the microstructure with strip or equiaxed primary αphase can be obtained by solution aging heat treatment .The ultimate strength remains at a high level because of a large num-ber of secondary αphase .With increasing aging temperature , strength of Ti-55531 titanium alloy decreases obviously , while above 620 ℃, reduction of area increases gradually , but the fracture toughness is relatively low . Lamellar structure can be obtained by βannealing .Under this condition the fracture toughness is relatively high , and strength linearly decreases when annealing temperature changes from 600 ℃to 650 ℃, which is easy to adjust strength level , while the ductility property is not sensitive with the variety of annealing temperature .