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| 加工及热处理对铂棒晶粒组织的影响 |
| Effect of Processing and Heat Treatment on the Grain Structure of Platinum Rods |
| Received:September 15, 2020 |
| DOI： |
| 中文关键词: 纯铂棒材 晶粒 轧制工艺 退火 |
| 英文关键词: pure platinum grain rolling process annealing |
| 基金项目: |
| Author Name | Affiliation | | SONG Yao | Grikin Advanced Materials Co. Ltd., Beijing 102200, China | | LUO Yao | Grikin Advanced Materials Co. Ltd., Beijing 102200, China | | HOU Zhi-chao | Grikin Advanced Materials Co. Ltd., Beijing 102200, China | | WANG Peng | Grikin Advanced Materials Co. Ltd., Beijing 102200, China | | HE Xin | Grikin Advanced Materials Co. Ltd., Beijing 102200, China | | ZHENG Cheng-yi | Grikin Advanced Materials Co. Ltd., Beijing 102200, China | | XU Guo-jin | Grikin Advanced Materials Co. Ltd., Beijing 102200, China |
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| 中文摘要: |
| 纯铂作为目前应用于半导体、医疗等领域的重要贵金属材料，晶粒组织均匀性、整体尺寸对材料的使用性能至关重要。利用金相显微镜及显微硬度计对不同工艺方法制得的纯铂棒材的晶粒形貌观察，并通过定量软件进行统计计算，研究了锻压、冷加工变形量、退火工艺对铂棒晶粒均匀性的影响。结果表明，80%变形量纯铂在700℃保温1.5 h，再结晶基本完成；40%小变形量纯铂在900℃保温1.5 h，晶粒长大，平均晶粒度达到155.2 μm，整体均匀性最佳。获得一种可得到细小均匀再结晶晶粒组织的纯铂棒材的加工工艺:对铸棒进行锻造、冷轧，冷轧道次变形量为5%~10%，最终变形量为80%，成型铂棒700℃退火1.5 h，晶粒度可到达47.8 μm，硬度为46.07，满足纯铂棒材的使用要求。 |
| 英文摘要: |
| As an important precious metal material, pure platinum was used in semiconductor, medical and other fields. The uniformity of grain structure and overall size were very important to the performance of the material. The grain morphology of pure platinum bar prepared by different methods was observed by metallographic microscope and microhardness tester, and the influence of forging, cold working deformation and annealing process on the grain uniformity of platinum bar was studied by quantitative software. The results showed that the recrystallization of pure platinum with 80% deformation was basically completed at 700℃ for 1.5 h. The pure platinum with 40% small deformation was kept at 900℃ for 1.5 h, and the grain size grew up to 155.2 m, with the best overall uniformity. To obtain a pure platinum bar with fine uniform recrystallized grain structure, the cast bar was forged and cold rolled, the cold rolling process deformation amount was 5%~10%, the final deformation amount was 80%, the formed platinum bar was annealed at 700℃ for 1.5 h, the grain size reached 47.8 μm, the hardness was 46.0, which met the requirements of pure platinum bar. |
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