High end raw material purification:adoptVacuum melting(VAR)+ electroslag remelting(ESR),Reduce sulfur in steel、phosphorus、Harmful elements such as hydrogen,Reduce inclusions and segregation,Used for wind turbine spindle 34CrNiMo6 Steel needs to undergo double vacuum smelting,impurity content≤0.005%。
Core heat treatment process:
quenching and tempering(quenching + High temperature tempering):Optimal matching of strength and toughness,42CrMo Tensile strength after quenching and tempering≥1080MPa,yield strength≥930MPa,Widely used for shafts、gear。
Low temperature aging:Eliminate residual stress,Stable size,Prevent cracking during subsequent processing,If large wind turbine flanges need to be installed 200–250℃insulation 10–20 hour。
surface strengthening:induction hardening、carburizing / nitriding,Improve surface hardness and wear resistance,The surface hardness of gear forgings after carburizing reaches HRC58–62,Maintain resilience in the heart。
Intelligent detection standards:High end forgings need to go throughUltrasonic flaw detection(UT)、Magnetic Particle Inspection(MT)、X X-ray diffraction(residual stress),The accuracy of defect recognition reaches 99.2%,Ensure no internal cracks or inclusions。


