电弧增材制造00Cr13Ni5Mo合金组织及性能的研究

Effects of Scanning Paths on Microstructure and Mechanical Properties of Wire Arc Additive Manufacture of 00Cr13Ni5Mo Alloy

基于机器人MIG焊接技术和快速成形原理,实现了00Cr13Ni5Mo不锈钢材料的电弧增材制造,研究了成形路径和热处理对电弧增材制造沉积层组织和性能的影响。结果表明,不锈钢一字型路径成形试样中针状马氏体的数量要多于弓字型路径成形试样;沉积态试样经过1 000℃奥氏体化处理后,一字型路径成形试样较弓字型的奥氏体晶粒晶界更加明显,晶界处有条状铁素体析出;而经过600℃回火处理后,一字型路径成形试样的逆变奥氏体形态多为条状,但较弓字型路径成形试样中的更为细小。一字型沉积态不锈钢试样的硬度(HV)为400~440,抗拉强度高于1 200 MPa,硬度和抗拉强度相比奥氏体化、600℃回火试样高,且比弓字型的力学性能有所提高。

The wire arc additive manufacture（WAAM）of 00 Cr13 Ni5 Mo stainless steel was conducted based on the principle of MIG welding robot technology and rapid prototyping.The microstructure and properties of the WAAMed 00 Cr13 Ni5 Mo deposited layer were investigated by different forming paths and heat treatments.The results show that the number of acicular martensite in 00 Cr13 Ni5 Mo deposited layer in one-type forming path is more than that of ones in zigzag forming path,and grain boundary of austenite in one-type forming path is more obvious than that in zigzag forming path,and ferrites are precipitated from the grain boundary after 1 000℃austenitizing treatment.The shape of the invert austenite in one-type forming path sample exhibits mostly strip and smaller than zigzag forming path sample after 600 ℃ tempering treatment.The micro-hardness of 00 Cr13 Ni5 Mo stainless steel sample reaches400-440 HV and tensile strength is more than 1 200 MPa in one-type forming path.The microhardness and tensile strength of the stainless steel in one-type forming path are higher than those of ones at 1 000℃ austenitizing and 600 ℃ tempering treatment,and their are the better than those in zigzag forming path.