【摘要】：利用ANSYS對(duì)脈沖放電電磁熱止裂溫度場(chǎng)和應(yīng)力場(chǎng)進(jìn)行模擬,然后對(duì)電磁熱止裂后的16Mn鋼試樣熔覆Ni45合金粉末的表面溫度場(chǎng)瞬時(shí)變化進(jìn)行模擬。結(jié)果表明,在8000 V高壓脈沖電壓下,裂紋尖端的溫度可達(dá)1500℃以上,裂尖部分熔化,進(jìn)而使裂尖鈍化,脈沖放電后1000 s時(shí)構(gòu)件的溫度基本接近室溫。脈沖放電瞬間接近裂尖處的殘余應(yīng)力較大,而遠(yuǎn)離裂尖處的壓應(yīng)力較小。激光熔覆過程中垂直于激光掃描方向存在著一定的溫度梯度。
[Abstract]:The temperature field and stress field of pulse discharge electromagnetic thermal crack arrest were simulated by ANSYS, and then the instantaneous variation of surface temperature field of 16Mn steel sample coated with Ni45 alloy powder after electromagnetic thermal crack arrest was simulated. The results show that at 8000 V high voltage pulse voltage, the crack tip temperature can reach more than 1500 鈩，

本文編號(hào)：2510295