浠婂ぉ缁欏悇浣嶅垎浜?i>s136妯″叿閽㈠鍛?/i>鐨勭煡璇嗭紝鍏朵腑涔熶細瀵?i>s136浠锋牸涓滈敎鐗规畩閽?/i>杩涜鍒嗕韩锛屽笇鏈涜兘瀵逛綘鏈夋墍甯姪锛?br>
鏈枃瀵艰鐩綍锛?/b>
1銆?a href="#s136妯″叿閽㈠鍛? >s136妯″叿閽㈠鍛?/a>
2銆?a href="#s136浠锋牸涓滈敎鐗规畩閽? >s136浠锋牸涓滈敎鐗规畩閽?/a>
3銆?a href="#妯″叿閽环鏍艰〃s136" >妯″叿閽环鏍艰〃s136
2.优良的抛旋光性
3.优良的耐磨性
4.优良的机械加工性
s136浠锋牸涓滈敎鐗规畩閽?/a>
銆€銆€Selectivelasermelting(SLM)forrapidformingmetaldieshasbecomeahotspotinresearchandapplicationinthisfield.ThemicrostructureandformingmechanismofS136diesteelpowderunderoptimizedprocessparametersforSLMformingarestudied.Thephasecompositionofthetestpieceandthepowderandtheinfluenceofthelaserpowerareanalyzed.Themicroscopicpropertiesofthemoltenpoolonboundaryandinneraremeasureds136浠锋牸涓滈敎鐗规畩閽?,andthereasonsforthedifferenceareresearched.TheexperimentalresultsshowthattheS136diesteelspecimenformedbySLMisclosetofulldensitys136浠锋牸涓滈敎鐗规畩閽?,theinterfacesbetweenmoltenwaysaregoods136浠锋牸涓滈敎鐗规畩閽?theboundaryofmoltenpoolsisclear.However,microporegapandmicrocrackdefectscanbeobserved.Themicromorphologyisdifferentintheboundaryandnearthemoltenpoolandinthemoltenpool.Columnarcrystalexistsneartheboundaryofmoltenpool.Cytosoliccrystalliesinthemoltenpoolandthemicrocrystallinegrainisfine.ThephasesoftheformedpieceandthepowderarecomposedofFe-CrphaseandCrFe7C0.45phase.ThecontentofthecarbidephaseCrFe7C0.45increaseswiththeincreaseoflaserpower,andtheelasticmodulusandmicro-hardnessoftheboundaryofthemoltenpoolarelowerthanthecenterofthemoltenpool.
妯″叿閽环鏍艰〃s136
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