航空用钛合金的发展概况.doc

航空用钛合金的发展概况
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate sizroup number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
用量不断扩大。F/A－１８在不断改型的过程中其钛用量也不断增多。
　　民用飞机的钛用量也在不断扩大（图１和表３）。
　　我国战斗机的钛用量也在不断扩大：２０世纪８０年代开始服役的歼八系列的钛用量为２％，两种新一代战斗机的钛用量分别为４％和１５％，更新一代的高性能新型战斗机的钛用量将达２５％～３０％。
　　2. 航空发动机的钛用量
　　从表４和图２可知，国外先进发动机上的钛用量通常保持在２０％～３５％的水平。
　　我国早期生产的涡喷发动机均不用钛，１９７８年开始研制并于１９８８年初设计定型的涡喷１３发动机的钛用量达到１３％。２００２年设计定型的昆仑涡喷发动机是我国第一个拥有完全自主知识产权的航空发