کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11004125 | 1468626 | 2018 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure and mechanical properties of X65MoCrWV3-2 cold-work tool steel produced by selective laser melting
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Microstructure and mechanical properties of X65MoCrWV3-2 cold-work tool steel produced by selective laser melting Microstructure and mechanical properties of X65MoCrWV3-2 cold-work tool steel produced by selective laser melting](/preview/png/11004125.png)
چکیده انگلیسی
In this study, martensitic cold-work tool steel X65MoCrWV3-2 was processed by selective laser melting (SLM) by varying the laser scanning parameters and baseplate preheating temperatures. Porosity as well as crack density of the SLM-densified steel were determined by quantitative image analysis. The resulting microstructure and the associated local mechanical properties were characterized, and the hardness-tempering behavior of the SLM-densified steel was compared to the behavior of the conventionally manufactured X65MoCrWV3-2âsteel in the cast and hot-formed condition. Regardless of the preheating temperature, SLM-densified X65MoCrWV3-2 possesses a porosity of less than 0.5âvol.-%. The crack density was reduced significantly by means of a higher preheating temperature. The microstructure after SLM densification shows a fine, equiaxed cellular-dendritic subgrain structure, superimposed by lath- or needle-like martensite. The martensite morphology appeared to be finer at a lower preheating temperature, whereas the observed subgrain structure did not seem to be influenced by the preheating temperatures. Microhardness measurements indicated tempering effects in first solidified layers caused by the densification of subsequently deposited layers. Peak hardness after tempering of the SLM-densified steel was found to be higher compared to the maximum hardness in the X65MoCrWV3-2âsteel in the cast condition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Additive Manufacturing - Volume 23, October 2018, Pages 170-180
Journal: Additive Manufacturing - Volume 23, October 2018, Pages 170-180
نویسندگان
J. Boes, A. Röttger, C. Mutke, C. Escher, W. Theisen,