China Luo Yang Hengin Heavy Industry Technology

China Luo Yang Hengin Heavy Industry Technology

Home / Rotary kiln Support Roller / Ductile Iron Support Rollers
Ductile Iron Support Rollers
                                
1.Ductile Iron Support Rollers Casting-1 2.Ductile Iron Support Rollers Casting-2
                                
3.Ductile Iron Support Rollers NDT2  4.Ductile Iron Support Rollers NDT1

 
 
1. Nodular Cast Iron Material Brand: QT700-2
Chemical constituents:
C:3.4-3.6% Si:1.8% -2.0%  Mn0.5-0.6%,  S≤0.02% P≤0.05%  Re0.01-0.02%Mg:0.040-0.060%,
Cu:0.7-0.8%Mo:0.2-0.3%;Cr0.2-0.3%Sb:0.006%-0.008%


2.Mechanical Properties
Mechanical properties
 
Rm(MPa) Rp0.2(MPa) A(%) Heat Treatment Hardness
 
≥650 ≥380 ≥1 HB280-320
 
3. Metallographic Structure
According to GB9441-2009 "Metallographic Inspection of Ductile Iron", the metallographic structure of the attached cast specimens is checked as follows: spheroidizing grade is not less than 4 grades; metallographic structure is pearlite, the number of pearlite is more than 90%, the grade is "pearl 95"; dispersed ferrite is "iron 5"; phosphorus eutectic is "phosphorus 0.5" and carbide is "carbide quantity level". Press "carbon 1". 
4.Technical Difficulties       
4.1Require ultrasonic testing (UT) and magnetic particle testing (MT) in many places.      
4.2The heat dissipation in the inner cavity of the castings is poor, and the defects such as shrinkage and porosity are easy to form in the hot spot.          
4.3Thick section and long solidification time are not conducive to ensuring spheroidizing grade.       
4.4Performance Indicator QT700-2A.


 
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