H13 steel and flat steel products Overview - Jiangsu Lian source Machinery Manufacturing Co. Ltd.

    H13 steel and flat steel: Lotus source companies rely on improved range and forging process components, successfully developed various types of steel and flat steel, mainly used for valve, cylinder, mold manufacturing, steel flat steel largest length up to 700mm, maximum length is 1200mm, the maximum length of up to 10 meters. Made of steel and wrought material in addition to carbon steel and alloy steel, in recent years the development of the H13, 1Cr13, 20CrNiMo of materials such as steel and flat steel, surface roughness, angle of four complete, straightness standard. H13 steel is C-Cr-Mo-Si-V type steel, in the field of industrial application is extremely common, lotus source company science and technology personnel to its extensive research, and in smelting, forging process has many improvements. H13 steel is widely used and has excellent properties, mainly determined by the chemical composition of steel and the content and shape of impurity elements in steel. The results show that when Rm is in 1550MPa, the sulfur content of the material decreases from 0.005% to 0.003%, which will increase the impact toughness by 13J. Obviously, grade H13 steel sulfur content less than 0.005%, while the super should be less than 0.003%. The following analysis of the composition of H13 steel. Carbon: U.S. AISI H13, UNS T20813, ASTM H13 and FED QQ-T-570 carbon content of H13 steel is specified as 0.32-0.45%, is the widest range of carbon content in all H13 steel. Germany X40CrMoV5-1 and 1.2344 carbon content of 0.37-0.43%, a narrow range of carbon content, Germany DIN17350 and X38CrMoV5-1 carbon content of 0.36-0.42%. Japan SKD 61 carbon content of 0.32-0.42%. The carbon content of 4Cr5MoSiV1 and SM 4Cr5MoSiV1 in China GB/T 1299 and YB/T 094 is 0.32-0.42% and 0.32-0.45%, respectively, the same as SKD61 and AISI H13.

    H13 steel containing 5%Cr should have high toughness, so its C content should be maintained in the formation of a small amount of alloy carbide level. On the Fe-Cr-C three phase diagram at 870 DEG C, the position of H13 steel is better in the junction between austenite A and (A+M3C+M7C3) three-phase region. The corresponding C content is about 0.4%. The figure also shows an increase in C or Cr amount to increase the amount of M7C3, with higher wear resistance of A2 and D2 steel for comparison. It is also important to maintain the relative content of C, the lower is the temperature level of the steel Ms from relatively high (H13 steel Ms general information introduction is about 340 degrees), so that the steel with martensite and a small amount of residual A and residual alloy carbide uniformly distributed in quenching at room temperature, and after tempering get uniform tempered martensite. Avoid excessive residual austenite at work temperature change affect the work performance or deformation of the workpiece. These small residual austenite should be changed completely in two or three tempering after quenching. H13 steel after quenching the martensite microstructure was lath M+ small flake M+ small residual A. Finely alloyed carbide precipitated on lath M after tempering. The H13 die steel developed by Lotus source company has high strength, toughness and wear resistance, which conforms to the requirements of hot working die steel.