表面加工狀態(tài)對(duì)Ti-1023鈦合金疲勞性能的影響
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時(shí)間：2016-01-27
研究表面加工狀態(tài)對(duì)Ti-1023鈦合金疲勞性能的影響，結(jié)果表明：經(jīng)縱拋后的試樣表面粗糙度比圓磨試樣低1個(gè)數(shù)量級(jí)，其表面壓應(yīng)力是圓磨試樣表面壓應(yīng)力的3倍；當(dāng)循環(huán)次數(shù)大于107時(shí)，Ti-1023鈦合金縱拋試樣疲勞極限比圓磨試樣疲勞極限提高36%；零件可以通過表面噴丸處理在表層引入殘余壓應(yīng)力場和表面加工改善表面粗糙度相結(jié)合的方法，達(dá)到提高零件疲勞性能的目的。
表面加工狀態(tài)對(duì)Ti-1023鈦合金疲勞性能的影響Effect of surface machining state?on fatigue property of Ti-1023 titanium alloy研究表面加工狀態(tài)對(duì)Ti-1023鈦合金疲勞性能的影響，結(jié)果表明：經(jīng)縱拋后的試樣表面粗糙度比圓磨試樣低1個(gè)數(shù)量級(jí)，其表面壓應(yīng)力是圓磨試樣表面壓應(yīng)力的3倍；當(dāng)循環(huán)次數(shù)大于107時(shí)，Ti-1023鈦合金縱拋試樣疲勞極限比圓磨試樣疲勞極限提高36%；零件可以通過表面噴丸處理在表層引入殘余壓應(yīng)力場和表面加工改善表面粗糙度相結(jié)合的方法，達(dá)到提高零件疲勞性能的目的。
The effect of surface machining state on the fatigue property of Ti-1023 titanium alloy was studied. The results show that the test sample surface roughness by longitudinal polishing is one order of magnitude lower than that by circumferential grinding, the surface compressive stress of longitudinal polishing samples is threefold of that of circumferential grinding samples; the rotating bending fatigue limit of longitudinal polishing samples for 1×107?cycles is improved by about 36% than that of circumferential grinding samples. Surface compressive stress field can be induced by shot peening and surface roughness can be improved by surface manufacture to increase the fatigue property of Ti-1023 titanium alloy.
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