Hardening Steel Induction Hardening Machine For Surface Quenching and Tempering

WHAT IS INUDCTION HARDENING?

Hardening can be defined simply as any process by which the hardness of a material is increased and ductility is decreased. This can be done in order to strengthen high-wear surfaces and extend the service life of parts. Although there are a number of different methods for hardening which may be more or less suitable depending on the material being used, Induction technology is often utilized in a hardening process known as Quenching and Tempering.

WHAT IS INDUCTION QUENCHING AND TEMPERRING?

Quenching and Tempering is a hardening process that can only be performed in medium to high carbon steel. The steel is heated to a high enough temperature for the crystal structure of the iron to change from ferrite to austenite. In this altered crystal state, the steel is able to dissolve much more carbon than it otherwise could. The steel is then quenched using water, oil, or, in the case of induction equipment, a water-polymer solution. This quenching cools the steel rapidly which prevents carbon precipitates from forming which can reduce the final hardness of the steel. Once the steel cools to a low enough temperature, the crystal structure tries to return to its low-temperature state. At this point, the steel has dissolved more carbon than it can hold in its original low-temperature state so it transforms into a different crystal structure called martensite. Martensite is extremely hard due to having distorted crystal structures and a higher saturation of carbon. At this point, the steel is very hard but as a result, it is also very brittle. Tempering involves heating the steel back up to a much lower temperature in order to slightly reduce the hardness and, in turn, reduce the brittleness. The temperature at which the steel is heated depends on how much hardness needs to be retained by the steel. Once the desired hardness is achieved, the steel is quenched again in order to prevent residual heat from tempering the steel further.

Induction hardening is the heating process that increases the hardness and tensile strength of ferrous materials while induction tempering is used to increase the toughness of iron-based alloys. Tempering is usually performed after hardening in order to reduce some of the excess hardness.

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Pre-sale service.

• Inquiry and consulting service
• recommend the most suitable for our customers according to their requirements
• Sample testing support
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In-sale service.

• Strictly manufacture the machine, according to relevant technical standards.
• Take run test, according to relevant equipment test run regulations.
• Strictly check up the machine, before delivery
• Delivery on time.

After-sale service.

• Warranty time: 1year Warranty.
• Within warranty all parts are free for customer, any fault caused by non-artificial reason, any quality problems such as design, manufacture, or procedure occurs, We shall provide replacement parts after detecting the faults.
• If any big quality problems occurs out of the guarantee period, we will send maintenance
• technician to provide visiting service after checking with the customer and charge for a favorable price.
• We will provide a lifetime cost price to the buyer with the materials and spare parts used in system operation, equipment maintenance.
• The above mentioned are only basic aftersale service requirements,we will make more promises related to quality assurance and operation guarantee.