材料导报   2021, Vol. 35    Issue (Z1): 357-361      
										 
				
  
				
					
						
							
								
									
									 
											                            											                            																		
									金属与金属基复合材料 
											                         			                         			                         			                         										 
									
								         
		  							 
          							
          									  								 
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    					Hastelloy X激光熔覆工艺及组织性能  
  					 
  					  										
						徐连勇1,2 , 高雅琳1,2 , 赵雷1,2 , 韩永典1,2 , 荆洪阳1,2  
					 
															
					1 天津大学材料科学与工程学院,天津 300072 2 天津市现代连接技术重点实验室,天津 300072  
					 
										
						 
					 
   										
    					Microstructure and Mechanical Properties of Laser Cladding Process on Hastelloy X  
  					 
  					  					  					
						XU Lianyong1,2 , GAO Yalin1,2 , ZHAO Lei1,2 , HAN Yongdian1,2 , JING Hongyang1,2  
					 
															
						1 School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China 2 Tianjin Key Laboratory of Advanced Joining Technology, Tianjin 300072, China  
					   
									
				
				
					
						
							
								
									
										
								            
                        					 
												
													
													    
													    	
									 
								 
								
													
													
													    
													    		                            						                            																	    摘要  基于激光熔覆的增材制造方法,研究了镍基超级合金Hastelloy X的组织和力学性能。采用光纤激光器对Hastelloy X粉末进行熔覆试验,通过对激光熔覆工艺参数进行优化,制造了宏观表面无缺陷的Hastelloy X试样。结果表明,与传统锻造Hastelloy X方法相比,激光熔覆方法使材料在制造过程中发生再结晶,出现晶粒尺寸较小的细等轴晶粒,提高了材料的显微硬度和抗拉强度,韧性降低。 利用扫描电子显微镜(SEM)对Hastelloy X的拉伸断口进行了分析,研究了Hastelloy X在750 ℃下的高温拉伸断裂机理,为混合型断裂。 
																										     
													    
													    	
															 
														 
												  		 
												         
												        														
															关键词:  
																																																																激光熔覆  
																																																																	Hastelloy X  
																																																																	力学性能  
																																																																	微观组织  
																																  
															 
														 
																																										
															Abstract:  Based on the additive manufacturing method of laser cladding, microstructures and mechanical properties of the nickel-based superalloy Hastelloy X are studied. The direct energy depositing process uses laser beam to melt powders and to deposit layers of materials for buil-ding components. By optimizing the laser cladding process parameters, a parameter table is finally selected to deposit Hastelloy X without defects at the maximum deposition efficiency. The results show that, compared with as-forged Hastelloy X, the laser cladding process gives rise to recrystallization during continuous deposition, which results in the occurrence of finely equiaxed grains with a smaller grain size and improving of the microhardness and the tensile performance of the the as-deposited specimen, but slightly reduces the plastic deformation of the part. The tensile fracture mechanism of de-posited part at 750 ℃ is ductile-brittle fracture. 
														 
																																										
															Key words:  
																																																	laser cladding 
																	  																																		Hastelloy X 
																	  																																		mechanical property 
																	  																																		microstructure 
																																																 
														 
																												
														
															
															        
																    
																    
																    
																																	发布日期:   2021-07-16
															    															    	
															 
														 
														 														
															
																
															 
														 
																																										
															基金资助:  国家自然科学基金资助项目(52075374) 
														 
																											    														
															
															通讯作者:  
																zhaolei85@tju.edu.cn   
																													     		 
													     	 
														 
																																										
															作者简介:   徐连勇,天津大学材料科学与工程学院,教授。2007年3月毕业于天津大学材料科学与工程学院,材料加工工程博士学位;同年加入天津大学材料科学与工程学院工作至今工作,主要从事材料先进制造、结构高温完整性评价、结构蠕变/疲劳变形机理和应用研究,在国内外重要期刊发表论文150多篇,申请发明专利24项(美国1项)。赵雷,天津大学材料科学与工程学院,副教授。2012年7月毕业于天津大学材料科学与工程学院,材料加工工程博士学位;于2012年7月至2014年12月在北京航空航天大学做博士后。2014年12月进入天津大学材料科学与工程学院工作至今,主要从事材料先进制造、结构高温完整性评价、结构蠕变/疲劳变形机理和应用研究,在国内外重要期刊发表论文40多篇,申请发明专利20余项。 
														 
																											
							                        
													 
														
															引用本文:      
														 
														
															
																														徐连勇, 高雅琳, 赵雷, 韩永典, 荆洪阳. Hastelloy X激光熔覆工艺及组织性能[J]. 材料导报, 2021, 35(Z1): 357-361.	
																																									     												                                                                                                        	                                                             XU Lianyong, GAO Yalin, ZHAO Lei, HAN Yongdian, JING Hongyang. Microstructure and Mechanical Properties of Laser Cladding Process on Hastelloy X. Materials Reports, 2021, 35(Z1): 357-361.	
                                                        															 
														 
														 
														
														
															 
														 
														 
														
														
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