Analysis and Control of Decarburization in Hot Rolled Wire Rods of 65 Steel
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).
65 steeldecarburizationheatingcontrolled rolling and cooling
万方数据
维普
