| 引用本文: | 彭志江,张明俊,乐献刚.熔铸工艺对DZ417G合金组织性能的影响[J].材料科学与工艺,2013,21(4):50-56.DOI:10.11951/j.issn.1005-0299.20130409. |
| PENG Zhi-jiang,ZHANG Ming-jun,YUE Xian-gang.Effect of smelt-casting technology on the microstructure and mechanical properties of DZ417G superalloy[J].Materials Science and Technology,2013,21(4):50-56.DOI:10.11951/j.issn.1005-0299.20130409. |
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| 摘要: |
| 为了分析熔铸工艺对DZ417G合金组织性能的影响,通过对DZ417G合金采取常规浇注（1 560 ℃高温精炼5～7 s普通定向凝固）、炉前经不同温度高温熔体过热处理后,以不同的拉晶速率定向凝固等7种不同工艺方案对其化学成分、组织及力学性能进行了研究.结果表明：合金经1 600～1 620 ℃高温熔体过热处理后,以6.0～7.0 mm/min不同的拉晶速率定向凝固,碳化物、硼化物明显变小,在晶内、晶界上呈弥散状态分布；晶界上的低熔点（SymbolgA@+SymbolgA@′）共晶组织有所减少甚至消失,晶内SymbolgA@′强化相进一步弥散、方形化,柱状晶生长状态、枝晶间咬合好,从而能获得良好的力学性能. |
| 关键词: 熔铸工艺 过热处理 DZ417G合金 组织 性能 |
| DOI：10.11951/j.issn.1005-0299.20130409 |
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| 基金项目:国家自然科学基金资助项目（5,1）；上海大学研究生创新基金资助项目（A.16-0110-09-704）. |
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| Effect of smelt-casting technology on the microstructure and mechanical properties of DZ417G superalloy |
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PENG Zhi-jiang,ZHANG Ming-jun,YUE Xian-gang
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(AVIC Shenyang Liming Aero-Engine Corporation,Shenyang 110043,China)
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| Abstract: |
| To analyze the effect of casting process on the micnostructure and mechanical properties of DZ417G alloy,The chemical compositions,microstructure and mechanical properties of DZ417G super alloy produced via 7 different technologies was studied.The different technologies cover different melt treatment temperature and withdrawal rate.The results indicated that,by heating the melt in the temperature range from 1 600~1 620 ℃ with the directional solidification withdrawal rate（6.0~7.0 mm/min)the carbides and borides become fine significantly,and disperse in grains and on grain boundaries.The SymbolgA@+SymbolgA@′ eutectic structure decreases or disappear even,and the SymbolgA@′ particles in grain become more dispersed,and the shape tends to be more regular.The columnar grains are of good growth and interactive gear.Thus,favorable mechanical properties can be gained. |
| Key words: smelt-casting technology super heating DZ417G superalloy microstructure mechanical properties |
