Many problems occurs during carburising of steels. Some of these are: 1. Low Surface Hardness 2. Low Case Depth 3. Non-Uniform Case Depth 4. Soft Spots 5. Sooting 6. Distortion. Problem # 1. Low Surface Hardness: There are two main reasons of low surface hardness of a carburised component- Presence of large amount of retained […]
Problems of Carburising | Case-Hardening | Steel | Metallurgy
Article shared by : 
Top 9 Methods of Carburising | Case-Hardening | Steel | Metallurgy
Article shared by :
Depending on the nature of carbonaceous atmosphere, carburising is called pack, or solid carburising, liquid carburising, or, gas carburising. But, whatever may be the method used, carburisation always takes place via a gaseous phase. Method # 1. Pack or Solid Carburising: In this method, the carburising compound is a solid carburiser, usually charcoal of 3 […]
Flame-Hardening: Methods and Variables | Steel | Metallurgy
Article shared by :
In this article we will discuss about:- 1. Introduction to Flame-Hardening 2. Methods of Flame-Hardening 3. Operating Variables 4. Gases Used 5. Steels for Flame-Hardening 6. Applications 7. Advantages and Disadvantages. Contents: Introduction to Flame-Hardening Methods of Flame-Hardening Operating Variables for Flame-Hardening Gases Used for Flame-Hardening Steels for Flame-Hardening Applications of Flame-Hardening Advantages and Disadvantages […]
Laser Hardening: Variables and Advantages | Steel | Metallurgy
Article shared by :
In this article we will discuss about:- 1. Introduction to Laser Hardening 2. Metallurgical Variables of Laser Hardening 3. Advantages and Disadvantages. Introduction to Laser Hardening: Laser beams are invisible electromagnetic radiations in the infra-red portion of the spectrum, and are increasingly being used for surface-hardening of ferrous materials to improve mechanical properties like wear […]
Heat Treatment after Carburising | Steel | Metallurgy
Article shared by :
Carburised parts are generally heat treated for following reasons: 1. To develop hard and wear resistant surfaces. 2. The long lime and high temperatures during carburising may cause grain coarsening in core and or case. These may be refined to improve their properties like impact strength, etc. 3. If carburising has resulted in cementite network […]
Methods for Nitriding | Methods | Case-Hardening | Metallurgy
Article shared by :
The following points highlights the four main methods used for nitriding of steels. The methods are:- 1. Gas-Nitriding 2. Single-Stage and Double-Stage Nitriding 3. Ionitriding (Plasma), or Glow-Discharge Nitriding 4. Liquid Nitriding. Method # 1. Gas-Nitriding: Gas nitriding is the most commonly used nitriding method. In the original method, components are heated at about 510°C […]
Induction-Hardening: Types and Methods | Steel | Metallurgy
Article shared by :
In this article we will discuss about:- 1. Introduction to Induction-Hardening 2. Steels for Induction Hardening 3. Types of Induction Coils 4. Methods 5. Metallurgical Control 6. Advantages and Disadvantages. Contents: Introduction to Induction-Hardening Steels for Induction-Hardening Types of Induction Coils for Induction-Hardening Methods of Induction-Hardening Metallurgical Control in Induction-Hardening Advantages and Disadvantages of Induction-Hardening […]
Process of Carbonitriding | Case-Hardening | Steel | Metallurgy
Article shared by :
In this article we will discuss about:- 1. Introduction to Carbonitriding 2. Hardenability of Case for Carbonitriding 3. Case-Depth and Concentration-Gradient 4. Retained Austenite 5. Quenching Media. Contents: Introduction to Carbonitriding Hardenability of Case for Carbonitriding Case-Depth and Concentration-Gradient for Carbonitriding Retained Austenite for Carbonitriding Quenching Media for Carbonitriding 1. Introduction to Carbonitriding: Carbonitriding (as […]
Die Casting of Metals: Meaning and Advantages | Industries | Metallurgy
Article shared by : 
In this article we will discuss about:- 1. Meaning of Die Casting 2. Die Casting Machines 3. Advantages 4. Limitations. Meaning of Die Casting: Die casting utilises two blocks of heat resistant metal machined to meet along the plane of the parting line and having cavities machined accurately and smoothly into each to form opposite […]
Design of Die Casting Machine (With Diagram) | Industries | Metallurgy
Article shared by :
The use of ribs, hubs and bosses should be made in such a way that the weight is reduced, the part is strengthened and the general appearance is improved. Thick sections tend to cause the die to run hotter and, therefore, shorten die life. In addition, cooling of a large lump may cause porosity and […]