Properties Research Non-standard Brand Wind Power Nodular Iron QT700-10
The Application of non-standard brand nodular iron QT700-10 in wind power industry and its properties were inv-estigated,property index of as-cast tensile strength ≥ 650 MPa,yield strength ≥ 400 MPa,elongation ratio ≥ 6％,hardness 200～260 HB,pearlite volume proportion 50％～85％,nodule size of 4～7 grade,nodularity rate ≥85％were proposed and through pouring test specimen of 250 mm×250 mm×250 mm and compelling cooling to conduct property inspection test.Finally pointed out:(1)In D-type attached specimen,with Cu addition increasing,the tensile strength,yield strength and hardness had obvious increasing tendency.Under the condition of compelling cooling the elongation ratio was relatively stable and reliable,could reach requirement of QT700-10.(2)In mixed matrix Cu was very good alloying element,it could refine graphite,improve quenching degree,and thereby improve casting fracture structure and properties uniformity.
nodular ironmain axle of wind powermetallurgical structuremechanical properties
万方数据
维普
