Grinding Mill Part Casting Steel End Cover

Grinding Mill Part Casting Steel End Cover

Ball mill end cover: 

1. Material: ASTMA-27 grade 70-40 Class 1 
2. Heat treatment:Q.T. 
3. NDT:ASTM E-709 and ASTM E-125
 
1. Material: ASTMA-27 grade 70-40 Class 1
 
2. Mechanical Property

Yield Strength	≥275 MPA
Tensile Strength	≥485MPA
Elongation	≥22MPA

 
We have experienced QCP successfully executed for quality controlling for many years. We have the honor that we are ability to guarantee the foundry quality against so large steel casting.It's very important for us to decrease the cost and short the delivery in subsequent processing. The material of mill head is normally selected low carbon steel and low alloy steel.Distinctively we're good at refining on all key knots,including chemical elements controlling in foundry and subsequent heat treated.Thus we have the ability to keep the material grasping the maxium potential perfermance.The products even if in frequently working condition or very cold circumstance can possess prolong service life.
 
Processing and final Inspection to be taken by NDE according with ASTM and ISO standard, including UT and MPI .TPI to be acceptable yet.
 
In the field of grinding mill components, We supply mill heads,feed inlet,grinding roller,cement kiln riding ring, casting gears, shaft block .Also we supply mill shell of welding structures and fabrications.
Quality assurance documents
The following reports are to be submitted to Quality Assurance:
a. Chemistry report
b. Physical report
c. Heat treatment documents
CITIC HMC  Q/HM 973.2-2007 Specification for Steel Castings for Grinding Mills
d. Ultrasonic inspection report (before and after repairs)
e. Magnetic particle inspection report (before and after repairs)
f. Dimensional report
g. Weld repair maps
h. Weld procedures and Procedure qualification record
i. Welder qualification
j. Nondestructive testing inspector qualification

 

NO	Item	structural features	processing measure	Test content
1	cylinder	(1) massive structure (2)  L flange (3)  finite element analysis (4)  Surrounding the manhole mechanical processing	(1)union melt welding (2)  Whole annealing after welding (3)  polishing treatment (4)  Processing and ensure that both ends of the positioning alignment	(1)  Material certificate, review material machinery performance and chemical composition (2)  Cutting edge around the ultrasonic flaw detection (3)  Weld ultrasonic testing
2	End cap and Hollow shaft	(1)  High quality cast steel (2)   R rounded corners (3)  High strength bolts connected to the cylinder	(1) Molten steel refining outside the furnace (argon blowing and R - H vacuum processing) (2) Modelling using special sand, strict control of pouring temperature and casting speed (3) Shaft processing, assurance and coaxial degree and the roughness of the face	(1) Mechanical properties and chemical composition of casting billet (internal control standard) (2) Ultrasonic testing after rough machining (3) Ultrasonic testing and magnetic particle inspection after finishing