Analysis of Decarburization Causes and Improving Measures for NM400 Wear Resistant Steel Plate
HOU Dengyi
FENG Yong
Abstract：In view of the excessive problem of the decarburized layer on NM400 High Strength Wear Resistant Steel Plate, the main defect characteristics were described using test method on microstructure and core hardness and the decarburized layer was found about 0.9 mm. By analyzing and study, the quenching temperature and holding time were the main reasons for decarburization, meanwhile, chemical composition and carbon potential of heating furnace affected on the decarburization directly. To decrease the thickness of the decarburization layer, three prevention measures of optimizing composition, improvement for heating conditions, coating with a protective coating were taken. Through mass production, the average thickness of the decarburized layer can be reduced to less than 0.1 mm.
Keywords：wear resistant steel platedecarburizationhardnessmicrostructurequenching temperature
Publication Date：2015-03-02
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 32-33,37 )