Heat treatment method for laser melted deposition forming of 06Cr14Ni7Mo martensitic stainless steel

• Main Authors: LI HULIN, WANG LIN, ZHOU YAXIONG, YANG HUANQING, LEI YUE
• Format: Patent
• Language: Chinese; English
• Published: 22.02.2019
• 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; CHEMISTRY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; WORKING METALLIC POWDER

The invention discloses a heat treatment method for laser melted deposition forming of 06Cr14Ni7Mo martensitic stainless steel, and belongs to the technical field of metal additional material manufacturing. The heat treatment method comprises the following steps that firstly, solution treatment is conducted, heat preservation is conducted for 2 h-4 h under the vacuum environment where the pressureintensity is not larger than 10<-3>Pa and the condition that the temperature is 1,050 DEG C-1,130 DEG C, back filling of argon is conducted, and cooling is conducted; secondly, cold treatment is conducted, heat preservation is conducted for 2 h+/-30 min at the temperature ranging from -70 DEG C to -80 DEG C, and the room temperature is recovered in air; and thirdly, tempering treatment is conducted, the temperature ranges from 250 DEG C to 320 DEG C, heat preservation is conducted for 3 h-6 h, and air cooling is conducted. After heat treatment, the forming inner stress is removed, the amountof low-carbon lath martens