CAJ | 학술논문

研究了液压油缸用高强钢采用小热输入情况下，600 MPa级焊材焊接的对接接头组织和性能。结果表明：焊接对接接头的拉伸强度、冲击性能和冷弯性能优良，Ceq（20MnTiB）＜Ceq（45＃），但20 MnTiB淬硬倾向更大。高强钢焊接热影响区粗晶区组织较母材组织有所粗化，以低碳马氏体为主。当控制合理的热输入时，完全可以用于液压油缸的制造。
연구료액압유항용고강강채용소열수입정황하，600 MPa급한재한접적대접접두조직화성능。결과표명：한접대접접두적랍신강도、충격성능화랭만성능우량，Ceq（20MnTiB）＜Ceq（45＃），단20 MnTiB쉬경경향경대。고강강한접열영향구조정구조직교모재조직유소조화，이저탄마씨체위주。당공제합리적열수입시，완전가이용우액압유항적제조。
The welding butt joint performance of the high strength steel used in hydraulic cylinder was re-searched .The result shows that:with small heat input and 600 MPa grade weld metarial ,the results of the tensile strength , impact value and cold bending property are good .Although the carbon equivalent of 20MnTiB is lower than that of 45#,20MnTiB is more inclined to harden,and in HAZ,most of the struc-tures is the lower carbon martensite .With proper heat input ,20 MnTiB can be used in manufacturing of the hydraulic cylinder .