Investment Casting

Investment Casting

Precision Investment Castings Small Castings Company Product Description and Process Precision Investment Castings Small Castings Company Production process: lost wax casting process Weight range: from 0.01 kilograms to 50 kilograms Heat Treatment Process: normalizing, annealing, tempering etc....

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Precision Investment Castings Small Castings Company

Product Description and Process

Precision Investment Castings Small Castings Company

Production process: lost wax casting process

Weight range: from 0.01 kilograms to 50 kilograms

Heat Treatment Process: normalizing, annealing, tempering  etc.

Machining process: CNC machine, machining center, lathe, mill machine, drill machine, etc.

Surface treatment process: Paint coating, electrophoretic paint coating, electrogalvanizing coating, black oxide coating, phosphate treatment, powder coating, etc.


Product Material and Uses

Normally produce with ASTM A27/A27M Grade U-60-30, Grade  60-30, Grade 65-35, Grade 70-36, Grade 70-40, ZG200-400, ZG230-450, ZG270-500, ZG310-570, ZG340-640, etc.

The carbon steel casting products are widely used for Auto-cars, trains, trucks, vehicle components, and mining machinery components, agricultural machinery parts, textile machinery parts, construction machinery parts, etc.


Advantages of Investment Casting

INVESTMENT CASTING VS. SAND CASTING

Sand castings are made by creating a negative in a bed of  sand to create the cavity for casting. A sand shell creates a rough exterior to castings.

Typical surface finish of sand castings are 250 Ra as cast, and need extensive work afterwards to create a surface finish that is acceptable in most applications. Sand castings can also not hold as tight of tolerances as Investment Castings, and will likely need more machining than an Investment Casting.

Investment casting uses a ceramic mold that can produce a much smoother finish, typically averaging 125 Ra surface finish as cast. Investment castings also greatly reduce the amount of machining that will be required after casting by holding a .005”/inch tolerance for the majority of applications.


INVESTMENT CASTING VS. DIE CASTING

Die casting is the process in which molten metal is forced into a mold cavity. Using molten metal requires tooling that is made of hardened tool steel, which causes start-up costs to new programs to be extremely expensive. Tools also wear quickly, requiring expensive refurbishments and replacements throughout the life of the tool. Ferrous  metals, like carbon steel and stainless steel, cannot be cast using this method, further limiting its usefulness.

Investment casting injects wax into an aluminum cavity. Aluminum has a lower cost, is easier to cut, and less expensive to maintain. Using wax also is easier on tooling, allowing it to maintain consistent parts for many more uses. Investment casting allows for ferrous and non-ferrous metals (aluminum, brass, bronze, etc) to be cast.


INVESTMENT CASTING VS. FORGING

Forging is the process in which either hot or cold material is pressed with a massive hammer to push the material into the shape desired. This process requires extremely expensive tooling that often needs to be replaced. While the strength of a part is slightly better with forgings, the heightened level of danger inherent to forging, along with specialty equipment, drives the cost of forgings higher. Many forgings need to be heavily treated after completion for hardness, as well as to be machined due to lack of tolerance holding.

Investment casting requires less expensive equipment, and is inherently less dangerous, allowing costs to remain lower. Investment castings also can hold much tighter tolerances, reducing the amount of machining typical to forgings.


Cast Steel Grade Standard

China
GB

Germany

France
NF

 ISO Standard

Japan
JIS

Sweden
SS

Britain

BS

America

DIN

W-Nr.

ASTM

UNS

ZG200-400
     (ZG15)

GS-38

1.0416

-

200-400

SC410
     (SC42)

1306

-

415-205
     (60-30)

J03000

ZG230-450
     (ZG25)

GS-45

1.0446

GE230

230-450

SC450
     (SC46)

1305

A1

450-240
     (65-35)

J03101

ZG270-550
     (ZG35)

GS-52

1.0552

GE280

270-480

SC480
     (SC49)

1505

A2

485-275
     (70-40)

J02501

ZG310-570
     (ZG45)

GS-60

1.0558

GE320

-

SCC5

1606

-

(80-40)

J05002

ZG340-640
     (ZG55)

-

-

GE370

340-550

-

-

A5

-

J05000

Note: in the bracket is the old Grade 


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