Alloy Spheroidal Graphite Iron Rolls

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Description

Product Detail

Equipped with one of the best alloy spheroidal graphite iron rolls brands, Kaida Roll Group is one of competitive alloy spheroidal graphite iron rolls manufacturers and suppliers in China, welcome to visit our website.

Alloy Nodular Cast Iron Rolls (SG)

These rolls are characterized by spherical graphite.Its mechanical properties are similar to that of alloy indefinite chilled rolls except that its strength is higher than the latter.They can be produced by static casting.

Speaking of static casting, there’re two type of static process

No.1, Monobloc Static Cast Roll

Definition:

-Single pour casting rolls employ the same chemical content, i.e. Barrel and Neck.

-To achieve the different requirement of hardness, strength, and metallurgy by the means of controlling the freezing rate of molten iron

Material Application:

Material:	Stands:	Hardness:
SGP	Roughing	45 – 50 Shore
SGP	Intermediate	50 – 65 Shore
ACS/Steel/Base steel	Roughing	35 – 45 Shore
Base steel/Graphite steel	Intermediate/Finishing	50 – 55 Shore
SGA	Intermediate/Finishing	63 – 68 Shore
SGA/Mo (Heat Treatment)	Intermediate/Finishing	70 Max Shore
NCC (Heat Treatment)	Roughing	45 – 55 Shore
AIC	Finishing	63 – 68 Shore
Hi Cr	Intermediate/Finishing	55 - 65 Shore

Pros and Cons:

Pros:	Cons:
Low cost	Max hardness is limited
Easy production	Strength of neck is limited
Material already exists	Hardness drop is large
Common material
Easy machining
Large diameter

No.2, Composite Static Cast Roll

Step 1, molten iron pours into outer shell

Step 2, after solidification of outer shell molten iron; add molten iron to the core, the overflow molten iron can be reclaimed.

Definition:

-The chemical content of barrel work layer is different from core and neck

-The properties of this type of rolls depends on chemical content, the cooling rate of both are also critical

Pros and Cons:

Pros:	Cons:
Common material applicable	Higher cost
Max hardness is higher	Core material selection limited
Hardness drop is smaller	Neck strength is limited

Chemical Composition %

Symbol	C	Si	Mn	Cr	Ni	Mo	Mg
SG?	2.90-3.60	0.80-2.50	0.40-1.20	0.20-0.60	-	0.20-0.60	=0.04
SG?	2.90-3.60	0.80-2.50	0.40-1.20	0.20-0.60	0.50-1.00	0.20-0.80	=0.04
SG?	2.90-3.60	0.80-2.50	0.40-1.20	0.30-1.20	1.01-2.00	0.20-0.80	=0.04

Prosperities&Application

Symbol	Hardness HS	Tensile Strength MPa	Bending Strength MPa	Dimension MM	Unit N.W KGS	Application
SG?	50-70	=320	500-700	?300-1300	500-35000	Rolls for finish stands of light section mills, bar and wire rod mills, hot narrow strip mills and temper mill.
SG?	55-70	=320	500-700
SG?	60-70	=320	600-800