Tag Archives | Methods

Top 9 Methods of Carburising | Case-Hardening | Steel | Metallurgy

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 to 10 mm size (fines [...]

By |2017-10-24T05:51:36+05:30October 24, 2017|Steel|Comments Off on Top 9 Methods of Carburising | Case-Hardening | Steel | Metallurgy

Flame-Hardening: Methods and Variables | Steel | Metallurgy

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 of Flame-Hardening 1. Introduction to [...]

By |2017-10-24T05:51:36+05:30October 24, 2017|Steel|Comments Off on Flame-Hardening: Methods and Variables | Steel | Metallurgy

Problems of Carburising | Case-Hardening | Steel | Metallurgy

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 austenite or decarburisation. There is [...]

By |2017-10-24T05:51:36+05:30October 24, 2017|Steel|Comments Off on Problems of Carburising | Case-Hardening | Steel | Metallurgy

Laser Hardening: Variables and Advantages | Steel | Metallurgy

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 resistance and even fatigue resistance. [...]

By |2017-10-24T05:51:35+05:30October 24, 2017|Steel|Comments Off on Laser Hardening: Variables and Advantages | Steel | Metallurgy

Heat Treatment after Carburising | Steel | Metallurgy

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 at the surface, it induces [...]

By |2017-10-24T05:51:35+05:30October 24, 2017|Steel|Comments Off on Heat Treatment after Carburising | Steel | Metallurgy

Methods for Nitriding | Methods | Case-Hardening | Metallurgy

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 (500-575°C) in an atmosphere of [...]

By |2017-10-24T05:51:35+05:30October 24, 2017|Nitriding|Comments Off on Methods for Nitriding | Methods | Case-Hardening | Metallurgy

Induction-Hardening: Types and Methods | Steel | Metallurgy

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 1. Introduction to Induction-Hardening of [...]

By |2017-10-24T05:51:35+05:30October 24, 2017|Steel|Comments Off on Induction-Hardening: Types and Methods | Steel | Metallurgy

Process of Carbonitriding | Case-Hardening | Steel | Metallurgy

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 well as cyaniding) is the [...]

By |2017-10-24T05:51:34+05:30October 24, 2017|Steel|Comments Off on Process of Carbonitriding | Case-Hardening | Steel | Metallurgy

Shell Moulding: Merits and Demerits | Metals | Industries | Metallurgy

In this article we will discuss about:- 1. Meaning of Shell Moulding 2. Patterns and Materials for Making Shell Mould 3. Process 4. Merits 5. Demerits. Meaning of Shell Moulding: Shell moulding is a recent invention in casting techniques for mass production and smooth finish. It was originated in Germany during Second World War. For some time, it was called [...]

By |2017-07-24T11:54:37+05:30July 24, 2017|Casting|Comments Off on Shell Moulding: Merits and Demerits | Metals | Industries | Metallurgy

Die Casting of Metals: Meaning and Advantages | Industries | Metallurgy

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 halves of the shape to [...]

By |2017-07-24T11:54:37+05:30July 24, 2017|Casting|Comments Off on Die Casting of Metals: Meaning and Advantages | Industries | Metallurgy
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