摘要
为了探究H13模具钢粘结剂喷射成形过程中工艺参数对成形质量的影响,将打印层厚和粘结剂饱和度作为变量,进行了粘结剂喷射成形增材制造试验。对坯体相对密度和尺寸精度及烧结后成形件的显微硬度、表面粗糙度和致密度进行了测试,分析了打印层厚和粘结剂饱和度对成形质量的影响。结果表明,层厚和粘结剂饱和度能够显著影响制件成形质量。随打印层厚的增加,坯体的相对密度降低。粘结剂饱和度的增加会导致坯体尺寸精度和相对密度的降低,引起烧结件表面粗糙度的增大。打印层厚和粘结剂饱和度分别为75μm和80%时,坯体的相对密度达到最大值55.8%,但烧结致密度仅为79.5%。当打印层厚和粘结剂饱和度增加到150μm和125%时,烧结试样获得最高的致密度95.7%,此时显微硬度为785.7HV1,弥补H13模具钢在粘结剂喷射增材制造领域中成形及烧结工艺参数的空白。
In order to exploring the influence of process parameters on the forming quality of H13 die steel,the binder jetting additive manufacturing experiment was carried out with different layer thickness and the binder saturation,The influence of layer thickness and binder saturation on forming quality was analyzed,with testing the relative density and dimensional accuracy of green parts as well as the microhardness,surface roughness and density of sintered parts.The results indicate that the layer thickness and the binder saturation can significantly affect the forming quality of the parts.The relative density of the green part decreases with the increase of layer thickness.Due to the binder saturation increasing,the dimensional accuracy and the relative density of the green part decrease,and the surface roughness of the sintered part increase.When the layer thickness and binder saturation are 75μm and 80%respectively,the relative density of the green part reaches the maximum value of 55.8%,but the sintering density is merely 79.5%.Once the layer thickness and the binder saturation increased to 150μm and 125%respectively,the sintered sample obtained the highest density of 95.7%,with the microhardness of 785.7HV1.It makes up for the vacancy of forming and sintering process parameters of H13 die steel in binder jetting additive manufacturing filed.
作者
杨永强
黄坤
吴世彪
张越
周瀚翔
YANG Yongqiang;HUANG Kun;WU Shibiao;ZHANG Yue;ZHOU Hanxiang(South China University of Technology,Guangzhou 510641,China)
出处
《航空制造技术》
CSCD
北大核心
2022年第23期90-97,109,共9页
Aeronautical Manufacturing Technology
基金
广东省重点领域研发计划(2018B090905002)。
