Al，Mo，B及Zr含量的变化对GMR235合金组织和性能的影响  

Effect of AI,Mo,B and Zr on Microstructure and Mechanical Properties of GMR235 Alloy

作　　者：史世凤[1] 胡博炜[1] 贾崇林[1] 范强[1] 牛永吉[1] 

机构地区：[1]北京北冶功能材料有限公司,北京100192

出　　处：《金属材料研究》2012年第3期6-10,共5页Research on Metallic Materials

摘　　要：为了研究微量元素对合金组织和性能的影响，对GMR235合金成分进行了调整。合金采用真空冶炼，其中，10～5#试样铝含量（质量分数，％）设计成分分别为：3．0％，3．3％，3．6％，3．9％和4．3％；6#～10#试样的含钼量设计成分分别为：4．5％，4．8％，5．1％，5．6％和6．0％；110为中间成分未添加Zr，12#试样为中间成分添加了B和Zr；13#～17#试样的含硼量设计成分分别为：0．025％，0.040％，0．050％，0．060％和0．070％。考察不同的Al，Mo，B，Zr含量对GMR235合金力学性能的影响。用热力学计算分析GMR235合金可能析出的平衡相，用扫描电镜进行组织观察，对试样进行650℃拉伸试验和816℃／345MPa的持久试验。结果表明，适量的加入A1，Mo，B元素可提高合金的力学性能，Al含量3．65o．4～3．73％范围内、Mo含量4．92％、B含量0．038％时GMR235合金综合性能最好。合金元素B，zr的添加可明显改善合金的持久寿命和塑性，抑制碳化物的析出，使碳化物颗粒细化。was intermediate composition without Zr additionl No. 12%was intermediate composition with B and Zr addition B in No. 13%- 17# were 0#- 025 %,0. 040%,0. 050 %,0. 060% and 0. 070 %. Thermodynamic calculation was used to analyze the possible precipitation of equilib- rium phases, and the microstructure was observed by scanning electronic microscope. The tensile test at 650℃ and stress-rupture test at 816℃ /345 MPa were carried on the sam- ples. The experimental results showed that the proper addition of AI, Mo and B could im- prove the mechanical properties. The optimum content range of A1 was between 3.65% and 3.73 %,Mo is up to 4. 92% and B is up to 0. 038%. The addition of B and Zr could improve the high temperature creep rupture life and plasticity of the alloy distinctively, restraining the precipitation of carbides and refining carbide particles.

关 键 词：GMR235合金 微合金化 时效 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]