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材料研究学报  2020, Vol. 34 Issue (8): 635-640    DOI: 10.11901/1005.3093.2019.591
  研究论文 本期目录 | 过刊浏览 |
FDM3D打印316L不锈钢试样和La对析出物形貌和分布的影响
蔡国栋, 程西云(), 王典
汕头大学工学院 汕头 515000
Preparation of 316L Stainless Steel Products by Fused Deposition Model 3D-printing and Effect of La on Morphology and Distribution of Precipitates
CAI Guodong, CHENG Xiyun(), WANG Dian
Department of Mechanical and Electrical Engineering, Shantou University, Shantou 515000, China
引用本文:

蔡国栋, 程西云, 王典. FDM3D打印316L不锈钢试样和La对析出物形貌和分布的影响[J]. 材料研究学报, 2020, 34(8): 635-640.
Guodong CAI, Xiyun CHENG, Dian WANG. Preparation of 316L Stainless Steel Products by Fused Deposition Model 3D-printing and Effect of La on Morphology and Distribution of Precipitates[J]. Chinese Journal of Materials Research, 2020, 34(8): 635-640.

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摘要: 

使用微米级316L不锈钢粉末和蜡基粘结剂制备热融性喂料,用FDM型金属3D打印方法和工艺3D打印成形目标模型生胚,经过脱脂和烧结成形为最终金属试样。对制备出的金属试样进行性能表征和测试,验证了此种成形方式的可行性,针对试样中析出物的形貌不规则和晶界上的夹杂物,研究了稀土La对析出物的影响。根据生胚脱脂后形成的微孔结构,提出一种液相添加稀土La的方法。结果表明:用FDM型3D打印能制备316L不锈钢试样,用液相添加法可向生胚中添加微量稀土La,质量比为0.3%的LaCl3能显著改善烧结后试样中析出物的微观形貌和分布。

关键词 材料合成与加工工艺FDM型金属3D打印微孔结构液相添加稀土元素析出物    
Abstract

The hot melt feedstock was prepared with micron 316L stainless steel powder and wax based binder. The green body was formed by 3D printing, and the final product was formed by degreasing and sintering. Through the performance characterization and test of the final product, the feasibility of this forming method has been verified. Aiming at relieving the irregular morphology of precipitates and the emerge of inclusions on grain boundaries of the prepared products, the influence of rare earth La on the deposition has been explored. Based on the microporous structure formed by degreasing of the green body, a method of adding La via liquid phase has been proposed. The results show that 316L stainless steel products can be prepared by FDM type 3D printing, trace rare earth La can be added to the green body via liquid phase addition method, and the mass ratio of 0.3% LaCl3 can significantly improve the microstructure and distribution characteristics of final products after sintering.

Key wordssynthesizing and processing technics    fdm metal 3D printing    microporous structure    liquid phase addition    rare earth elements    precipitates
收稿日期: 2019-12-19     
ZTFLH:  TB333  
作者简介: 蔡国栋,男,1993年生,硕士生
图1  送料管的示意图
S1S2S3S4
D/mm10355060
表1  加热块的分布
图2  烧结过程中的升温曲线
图3  生胚试样和截面的形貌
图4  脱脂前后试样的SEM照片
图5  烧结前后试样宏观形貌

Forming

mode

Shrinkage

Density

/g·cm-3

Hardness

/HB

3D printing1.2107.81138
PIM1.1657.88110
表2  成形参数对比
图6  316L不锈钢的显微组织
图7  析出物的EDS分析
图8  稀土添加前后试样SEM图(白色虚线框内为LaCl3结晶物)
图9  稀土添加前后烧结试样析出物形貌及分布(白色箭头为析出物)
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