Heating and holding

This process involves heating to and holding at a suitable temperature for the material concerned, followed by cooling, usually at a slow or controlled rate.

Purpose

The primary purpose is to soften the material but may also be used to affect other properties or the microstructure.

machinability

For example other purposed may include machinability, facilitate cold work, modify mechanical properties and relieve stresses. For ferrous alloys, annealing is usually done at temperature above the upper critical limit and can be in the order of 700°C or substantially more. The rate of cooling is normally slow.

Simple and cost-effective

This simple and cost-effective heating process can deliver fast and consistent heat for:
> Welding fabrication and construction;
> Preheating of welds;
> Post-weld heat treatment;
> Coating removal; and
> Shrink fit applications

save time

Applications that would typically require hours to heat can be done in minutes utilizing induction heating.
In addition to the simplicity and efficiency, the ProHeat 35 induction heating system solves many key issues in today’s environment: Does not produce the exposure to burns associated with open flames and electrical resistance wires (only the work part becomes hot)

benefits

> No significant expense of fuel gases.
> Produces fewer fumes than flame heating.
> Produces less particulate from overheated insulation caused by high temperature electrical wires and ceramic pads.

Stress

Residual stresses are built up during a manufacturing process by cold working, grinding or by quenching. Fusion welding also generates residual stresses, as thermal stresses may be introduced by temperature gradients. Technically a part is stressed beyond its elastic limit and plastic flow occurs. The objective of a stress relief heat treatment is to heat the part to a sufficiently high temperature to reduce the residual stresses to an acceptable level.

Heat Treatment

In welding, the term 'Post Weld Heat Treatment' is more widely used, as the purpose of this heat treatment may be to bring about the relief of residual stresses and/or to produce a particular metallurgical structure or material properties. 

STEEL

Post weld heat treatments on ferritic steel welded joints are undertaken at temperatures ranging from 550° to as high at 750°C depending upon the steel type and history.

Speed and efficiency

When a heat treatment problem arises, the key to success lies with the ability of the specialist company to respond quickly and efficiently.

technique

Prior to any site work, it is vital that clear recommendations provide guidance on the best available technique for the application combined with a competitive approach.

feasibility Study

For large complex projects, a feasibility study is undertaken by experienced and expert Site Heat - treatment Services personnel to determine the best course of action using the most suitable equipment to provide the desired temperature distribution.

skill

Site Heat - treatment Services provides skilled labor and equipment to undertake in situ heat treatments on site. Such heat treatments are usually associated with welding for installation, modification or repairs. It is often localized in nature. Examples of this type of work are the localized heat treatments of pipework butt welds and pressure vessels. A range of standards applies to this work, but the standards below are widely applied. Both electrical resistance and high velocity gas methods are adopted for these on-site activities.

Upcoming services: 

In house furnace heat treatment

In-House Furnace Heat Treatment at Site Heat - treatment Services Port Talbot Facility
To supplement the site operations, and to provide a comprehensive service, a heat treatment furnace division has been established at our own premises in Port Talbot. Three furnaces have been established that have been designed for batch heat treatments at temperatures up to 750°C They are utilized on a regular basis for stress relieving, annealing, and normalizing of loads. Furnace treatment provides an economic option where an in-situ approach can be avoided.

Upcoming services: 

In house furnace heat treatment

In-House Furnace Heat Treatment at Site Heat - treatment Services Port Talbot Facility
To supplement the site operations, and to provide a comprehensive service, a heat treatment furnace division has been established at our own premises in Port Talbot. Three furnaces have been established that have been designed for batch heat treatments at temperatures up to 750°C They are utilized on a regular basis for stress relieving, annealing, and normalizing of loads. Furnace treatment provides an economic option where an in-situ approach can be avoided.

Upcoming services: 

In house furnace heat treatment

In-House Furnace Heat Treatment at Site Heat - treatment Services Port Talbot Facility
To supplement the site operations, and to provide a comprehensive service, a heat treatment furnace division has been established at our own premises in Port Talbot. Three furnaces have been established that have been designed for batch heat treatments at temperatures up to 750°C They are utilized on a regular basis for stress relieving, annealing, and normalizing of loads. Furnace treatment provides an economic option where an in-situ approach can be avoided.