摘要
采用液-固相复合法-包覆浇铸＋轧制复合法制备304不锈钢/Q345复合板。包覆浇铸过程采用自行设计的浇铸模具制得复合铸坯,再经多道次热轧制备不锈钢复合板。采用光学显微镜、扫描电镜、XRD和EDS等方法研究了变形量、轧后处理工艺等对复合板结合强度和结合界面组织的影响。结果表明：轧制总变形量为60%时,剪切强度达到了国家标准（σc≥210 MPa）,随变形量的增加,剪切强度提高明显。轧制总变形量为80%时,不同的轧后处理工艺（水冷和空冷）下,均能达到复合板性能标准,而且空冷后的复合板在高温工作环境下力学性能较稳定。变形量达到90%时,与80%变形量的复合板相比,力学性能有显著提高。两种复合板冷弯时均未出现开裂分层,冷弯结合度为100%。
The liquid and solid bonding methods（coated casting and rolling） were used to prepare 304 stainless steel/Q345 composite plates. The composite cast slab was prepared by self-designed casting mold in process of coated casting.Then, the composite plate of stainless steel was prepared by multi-pass hot rolling. The effects of deformation and treatment process after rolling on the bonding strength and bonding interface microstructure of the composite plate were studied by using optical microscope, scanning electron microscope, XRD and EDS methods. The results show that the shear strength reaches the national standard（σc≥210 MPa） as the total deformation of rolling is 60%. With the increase of deformation, the shear strength increases obviously. The mechanical properties of the composite plate reach the national standard under different treatment processes（air cooling and water cooling） after rolling, as the total deformation of rolling is 80%. Furthermore, the mechanical properties of the composite plate after air cooling are relatively stable under high temperature working conditions.The composite plate with 90% deformation has higher mechanical properties compared with 80% deformation. Two kinds of the composite boards have no cracking and delamination in cold bending. The bonding degree of cold-forming is 100%.
出处
《热加工工艺》
CSCD
北大核心
2018年第2期148-153,共6页
Hot Working Technology
关键词
液-固相复合法
轧制变形量
剪切强度
界面组织
liquid and solid bonding method
rolling reduction
shear strength
interface microstructure
