摘要
内燃机内部形状复杂导致其对成形制造工艺要求很高,激光熔覆成形目前研究的制造成形技术热点之一。采用激光熔覆技术制备内燃机用Ti600合金块体,并进行2h固溶后实施淬火,并通过实验测试手段研究固溶温度对激光熔覆成形件组织结构和力学特性的影响。研究结果表明,固溶Ti600合金内存在α"与α共物相,β相大部分转变成了α"相。升高固溶温度α"相比例上升。在β组织中形成了网篮组织,α板条宽接近0.7μm。固溶Ti600合金中形成了更宽α板条以及尺寸更大沉积态组织。沉积得到的Ti600合金硬度接近330HV。当固溶温度时,Ti600合金硬度减小。750℃固溶下Ti600合金具有最高的加工硬化性能。Ti600合金断口部位发现大量韧窝,具备优异塑性。该研究属于特种成形制造领域,有助于提高内燃机的耐热性能以及使用寿命。
The complexity of internal shape of internal combustion engine leads to the high requirement of forming process.Laser melting forming is one of the hot spots of manufacturing technology at present.The Ti600 alloy block for internal combustion engine was prepared by laser cladding technology and quenched after 2h solution.The effect of solution temperature on the microstructure and mechanical properties of the laser cladding forming parts was studied by means of experimental test.The results show that α "and α" coexist in the solid solution Ti600 alloy,and the β phase is mostly transformed into α " phase.The proportion of α " phase increases as the solution temperature increases.The net basket structure was formed in the β structure,and the width of the α slats was close to 0.7μm.In the solid solution Ti600 alloy,wider α slats and larger sedimentary structure are formed.The hardness of Ti600 alloy obtained by deposition is close to 330HV.The hardness of Ti600 alloy decreases at solution temperature.Ti600 alloy has the highest work-hardening performance at 750℃ solution.A large number of dimples were found at the fracture site of Ti600 alloy with excellent plasticity.This research belongs to the field of special forming manufacturing,which is helpful to improve the heat resistance and service life of internal combustion engines.
作者
张明
陈兴华
李峰
ZHANG Ming;CHEN Xinghua;LI Feng(College of Transportation,Xinxiang Vocational and Technical College,He’nan Xinxiang 453000,China;College of Computer Science and Technology,He’nan Polytechnic University,He’nan Zhengzhou 450000,China)
出处
《机械设计与制造》
北大核心
2025年第5期213-216,共4页
Machinery Design & Manufacture
基金
河南省高等学校重点科研项目(22A4710005)。
关键词
金属材料
激光熔覆成形
加工硬化
微观组织
力学性能
Metal Materials
Laser Cladding Forming
Work Hardening
Microstructure
Mechanical Properties
作者简介
张明(1982-),男,河南新乡人,本科,高级实验师,主要研究方向:汽车设计。
