Heat treatment process for optimizing comprehensive mechanical properties of laser additive manufacturing high-temperature titanium alloy

• Main Authors: GAO GUANGRUI, ZHAO QINYANG, ZHAO YONGQING, ZHANG YAN, HU DAN, ZHOU WEI, WANG JIANJUN, JIA YUJU, MAO CHENGLIANG
• Format: Patent
• Language: Chinese; English
• Published: 13.10.2023
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; CASTING; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

The invention discloses a heat treatment process for optimizing comprehensive mechanical properties of a laser additive manufacturing high-temperature titanium alloy, which is used for carrying out triple heat treatment on the laser additive manufacturing high-temperature titanium alloy to obtain the laser additive manufacturing titanium alloy with good room-temperature strong plasticity matching and better high-temperature stretching and durability. According to the method, a fine needle-shaped lamellar structure of the laser additive manufacturing titanium alloy is evolved into a composite structure with a primary thick lamellar layer alpha, a fine secondary lamellar layer alpha and a residual beta phase by adopting triple heat treatment, so that the laser additive manufacturing titanium alloy breaks through the limitation that the strength and the plasticity are difficult to match well; according to the present invention, good room temperature strength and plasticity matching and good high temperature stre