MATERIALS & PROCESS

MATERIALS

CARBON STEEL
ASTM
WCB	A27 60-30
WCC	A148 90-60
LCB	105-85
LCC
DIN
1.0446	1.6220
1.0455	1.1131
1.0619	1.1138
1.0625

LOW ALLOYS STEEL
ASTM
A217 WC1	WC9
WC4	C5
WC5	C12
WC6	C12A
DIN
1.5419	1.4955
1.6759	1.7356
1.7357	1.7379
1.7359	1.7363
1.7365

MARTENSITIC STEELS
ASTM
CA6NM	LC3
LC1	LC4
LC2	CA15
LC2 - 1	CA40
DIN
1.4107	1.6781
1.4027	1.5638
1.4317	1.4008
1.5422	1.4028
1.5636	1.4313

AUSTENITIC STAINLESS STEEL
ASTM
CF8	CH20
CF8M	CN7M
CF3	CG8M
CF3M	CG3M
CF8C	CN3MN
CF10	CK3MCuN
CK20
DIN
1.4107	1.4539
1.4027	1.4308
1.4317	1.4408
1.5422	1.4306
1.5636	1.4404
1.6781	1.4827
1.5638	1.4843
1.4435	1.4500
1.4547,	1.4431

NICKEL BASED ALLOYS
ASTM
A494 N12MV	CW6M
N7M	CW2M
M35 - 1	CW6MC
M35 - 2	CX2MW
CY40	Cu5MCuC
CW12MW	50Cr50NiNb

DIN
2.4856	2.4686
2.4858	2.4610
2.4365	2.4602
2.4816

COBALT BASED ALLOYS
ASTM
AMS - 5387B	Stellite - 12
Stellite - 6

DUPLEX STEEL
ASTM
CD4MCuN(1B)	CE3MN(5A)
CD3MN(4A)	CD3MWCuN(6A)
DIN
1.4517	1.4470
1.4463	1.4469

HEAT RESISTING STEEL
ASTM
A297 HF	HK
HH	HD
HI
DIN
1.4825	1.4848
1.4837	1.4823
1.4846

Process Flow

Tool making

First stage of the Process is to design and develop tool for the wax injection for particular part with use of CNC machine.

Wax Injection

This process is to produce a replica of the required casting. This is made by injecting wax into a tool.

Pattern Assembly

These patterns are attached via a ‘gate’ to a central wax stick, referred to as a ‘tree’, to form a casting cluster or assembly, and mounted on a pouring cup.

Shell Coating

The wax tree is dipped in ceramic slurry, which is then coated with sand in a dedicated coating cabinet.

Dewaxing

The coated wax trees are dried in humidity controlled air cabinet.

Pouring

Dewaxed Shell are preheated at specific temperature and filled with molten metal, as the metal cools, the parts, gates, tree and pouring cup become a solid casting.

Shell removing

Once the metal has cooled sufficiently the ceramic shell is vibrated off the cast product by the use of a pneumatic knockout machine.

Heat treatment

The parts are cut away from the central tree and heat treated at specific temperature to get uniform structure and desired properties.

Finishing

Products are finished with shot blasting, grinding and machining for smooth finish.

Final Inspection

The final inspection and required tests are performed on each product to check dimensions and mechanical properties.