What are the five basic families of shape production processes?
The four basic families of shape production processes are: (1) Casting, (2) Material removal, (3) Deformation processes, and (4) Consolidation processes. Casting processes can produce extremely complex shapes, but may have defects related to shrinkage and porosity.
What are the advantages of casting process?
Advantages of casting process
- Any intricate shape may be internal or external can be made.
- It is practically possible to cast any material.
- Tools required for casting processes are generally inexpensive.
- Cooling of casting is generally uniform from all directions hence it is generally does not have directional properties.
What are the major steps involved in casting?
Basic Steps in Casting Process
- Patternmaking.
- Coremaking.
- Molding.
- Melting and pouring.
- Finishing.
- Patternmaking.
Which of the following is not a type of casting defect?
Which of the following is not a casting defect
| 1) | Blow hole |
|---|---|
| 2) | Hot tear |
| 3) | Decarburization |
| 4) | Scab |
| 5) | NULL |
What is ultrasonic method for detecting casting defects?
In cast materials, ultrasonic can be used to detect porosity, gas holes, shrinkage cavities, air locks and inclusions with proper selection of frequency because ofthe coarser grain size. Hence, for very coarse castings conventional ultrasonic testing is not suitable.
What is typically the frequency used in ultrasonic inspection?
Ultrasonic Testing (UT) uses high frequency sound waves (typically in the range between 0.5 and 15 MHz) to conduct examinations and make measurements.
In which type of test the capillary action principle is used?
Dye penetrant test
Which NDT method can be used to find crack inside an Aluminium casting?
Ultrasound-excited thermography is a nondestructive inspection method used to detect defects on and near the surface of test objects. This method can inspect a large area in a short time, and is known as of an effective method for detection of closed defects such as cracks [1][2][3][4] [5] .
Which of the following types of rays is used in radiography?
X-rays
What is the aim of inspection and testing of castings?
The objective of inspection of in-service cast products/components is to make sure that the component or part in service will further satisfactiorly perform its intendted purpose. Several non-destructive test (NDT) methods are being used to ensure the integrity of in-service components.
What are the functions of riser?
A riser, also known as a feeder, is a reservoir built into a metal casting mold to prevent cavities due to shrinkage. Most metals are less dense as a liquid than as a solid so castings shrink upon cooling, which can leave a void at the last point to solidify.
What is the advantage of magnetic particle testing comparing to other NDT test?
Advantages of the Magnetic Particle method of Non-Destructive Examination are: It is quick and relatively uncomplicated. It gives immediate indications of defects. It shows surface and near surface defects, and these are the most serious ones as they concentrate stresses.
What is soundness of casting?
Soundness: Measure of impurities and/or discontinuities such as sand inclusions, slag inclusions, macro porosity (pores greater than 50 nm in diameter) and shrinkage.
What is melted metal called?
Metals in their liquid form are called molten. When metal is heated, its temperature is raised. This is called heating. The liquidus state of the metal is called its molten state….What metals melt easily?
| Metal | Melting Point | |
|---|---|---|
| Aluminum Alloy | 463 – 671 | 865 – 1240 |
What is the term for a facility where casting is performed?
Foundry Definition In simplified terms, a foundry is a factory where castings are produced by melting metal, pouring liquid metal into a mold, then allowing it to solidify.
How does pattern vary in size with casting?
How does pattern vary in size with casting? Explanation: Patterns are duplicates of the objects we desire to cast. These patterns can be made up of plastics, metals or wood. A pattern is slightly larger in size as compared to casting because a pattern carries various allowances and the core prints.