Cu/Sb/Sn/Mo/W对新国标09CrCuSb钢组织及力学性能的影响  

Effect of Cu/Sb/Sn/Mo/W on Structure and Mechanical Properties of New National Standard 09CrCuSb Steel

作　　者：郑健[1] 彭志贤 袁渊[1] 黄振华 袁泽喜[2] 刘静[2] Zheng Jian;Peng Zhixian;Yuan Yuan;Huang Zhenhua;Yuan Zexi;Liu Jing(Hunan Xiangtan Iron and Steel Group Co.,Ltd.,Xiangtan,411101;Tlie State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan,430081)

机构地区：[1]湖南华菱湘潭钢铁有限公司,湘潭411101 [2]武汉科技大学省部共建耐火材料与冶金国家重点实验室,武汉430081

出　　处：《特殊钢》2023年第2期84-89,共6页Special Steel

基　　金：国家自然科学基金(52231003)。

摘　　要：采用金相显微镜、扫描电镜、电子探针、拉伸力学性能测试、夏比冲击测试,研究了新国标NB/T47019-2021的09CrCuSb钢合金元素Cu、Sb、Sn、Mo和W对其微观组织和力学性能的影响。研究表明,新标准中增加的合金元素将促进钢中δ-铁素体的析出,同时也会增加材料强度但会降低其塑性;δ-铁素体将显著降低材料冲击力学性能[其中,Rp0.2=365.64 MPa,夏比冲击功KV2为243 J(室温)和192 J(-40℃)],使得冲击断口由塑性断口向脆性断口特征转变,特别是对-40℃的冲击功降低作用尤为显著。在新国标成分框架下,须通过合理的热加工工艺调整,降低钢中δ-铁素体的析出,从而提高材料力学性能。In this paper,the effects of alloy elements Cu,Sb,Sn,Mo and W of new national standard 09CrCuSb on their microstructure and mechanical properties are studied by means of metallographic microscope,scanning electron microscope,EPMA,tensile mechanical property test and Charpy impact test.The results show that the addition of alloying elements will promote the precipitation ofδ-ferrite to increase the strength of the material but reduce its plasticity;δ-ferrite will significantly reduce the impact mechanical properties of the material,making the impact fracture change from plastic fracture to brittle fracture,especially for the impact energy at-40℃[Among them,Rp0.2=365.64 MPa,Charpy impact energies KV2243 J(ambient)and 192 J(-40℃)].Under the framework of the new national standard composition,it is necessary to adjust the reasonable hot working process to reduce the precipitation ofδ-ferrite and improve the mechanical properties of the material.

关 键 词：09CrCuSb钢 力学性能 硫酸露点腐蚀 锅炉用钢 

分 类 号：TG142.1[一般工业技术—材料科学与工程]