Based on JMatPro software,the phase transition points Ac1,Ac3 and austenitizing temperatures of 65 steel were calculated,the influence of billet decarburization,heating process,and controlled rolling and cooling process on hot-rolled wire rods was studied,and the optimum processing parameters was con-firmed by measuring the depth of billet decarburization layer and plotting the continuous cooling transforma-tion curve (CCT).The results showed that the grinding depth of 65 steel billets should be controlled with-in 1 mm,the heating temperature should be controlled between 950 and 1050 ℃,the descaling pressure should be controlled above 18 MPa,the final rolling temperature should be controlled between 800 and 830℃,the wire drawing temperature should be controlled from 800 to 850 ℃,and the roller speed of the air-cooled line should be controlled between 0.7 and 0.8 m/s.After rolling,the ϕ5.5 mm finished wire rod had no complete decarburization and the total decarburization depth was 0.03 mm,which could meet the decarburization requirements of the product (total decarburization≤0.044 mm).
关键词
65钢/脱碳/加热/控轧控冷
Key words
65 steel/decarburization/heating/controlled rolling and cooling
维普
万方数据