MTG Steels
Our constant effort for innovation, our long history in the production of high quality steels and the support of great international experts are the basis of MTG Steels.
MTG Steels
Our constant effort for innovation, our long history in the production of high quality steels and the support of great international experts are the basis of MTG Steels.
Our Steels
They are medium carbon and low alloy steels, manufactured with the most advanced production techniques at the level of cast steels and iron and steel. Thanks to the exhaustive control of their composition and extensive refining processes in electric arc furnaces and AOD converters, we ensure that our parts have low levels of non-metallic inclusions and dissolved gases. With this, we significantly improve their quality, providing them with a longer life and less breakage.
Properties of MTG Steels
The most important characteristic of MTG steels is their ability to resist wear and impact. Thanks to this, our products last longer and the risk of breakage is minimised.
During their use, the tooth steels are subjected, on a macroscopic level, to high static loads and strong impacts that can cause them to break, and to repetitive mechanical stresses that can lead to their breakage due to fatigue fractures.
At a microscopic level and due to the interaction with the ground, the surface of the parts undergoes high pressures and temperatures, as well as deformations and repetitive impacts that cause their gradual wear.
This wear is a complex phenomenon and is affected by many variables that are difficult to measure, depending on the type of terrain (hardness, compaction, granulometry, angularity, etc.), the type of application or the type of work (geometric shape of the part and the pressure it receives, angle of attack, speed, etc.), and even, the climatic conditions (corrosion phenomena).
Of the different types of wear that are known, the one experienced by our parts is fundamentally of the abrasive type. In its interaction with the ground, the steel of the surface of the teeth and adapters is severely deformed until it becomes detached.
How do MTG Steels achieve maximum wear resistance?
1. Through the optimal balance between its main properties
_____Hardness is the property of steel that has traditionally been correlated with the in-service behaviour of wear parts. The greater the hardness of the steel, the greater the resistance to wear and tear and the longer the life of the parts.
This classic view is correct for those service conditions in which the pressures between the parts and the ground are low or moderate. However, numerous field tests and laboratory trials carried out with the most prestigious universities and institutions show that, under certain service conditions, in addition to high hardness, other properties of the steel are necessary to ensure maximum resistance to wear.
In demanding applications where operating conditions involve high pressures and impacts between parts and the ground, high toughness is also required to ensure maximum resistance to wear.
2. Hardness
_____The hardness of a steel is defined as the resistance to penetration and scratching. The carbon content of a steel determines, almost exclusively, the maximum hardness it can reach. An effective heat treatment and sufficiently severe hardening allow this maximum hardness to be developed both on the surface and in the core of the parts. MTG steels guarantee a high level of hardness, the result of a carefully studied composition and a specific treatment specially developed by MTG.
3. Toughness
_____The toughness of a steel is a measure of its resistance to breakage when subjected to an impact. In a broad sense, it also indicates a material's ability to deform plastically before breaking. The homogeneity of the structure of a steel, as well as the level of inclusions and its morphology, are factors that determine its toughness. MTG steels are tough and guarantee that the pieces will not break and will wear less, even in the most demanding service conditions.
4. Degree of refinement
_____All those non-metallic inclusions and dissolved gases that are not eliminated during the manufacturing of a part, negatively affect the toughness of a steel. Thanks to the high quality standards applied to the production of MTG steels, which include extensive refining stages both in electric arc furnaces and AOD converters, it is possible to guarantee a low level of impurities and ensure a high level of toughness.
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Fragile steel
The continuous inclusions at the grain boundary make this steel fragile. -
Quality steel
Globular inclusions confer toughness, but sharp edges affect the characteristics of the steel. -
MTG steel
Clean steel with reduced number of small and round inclusions.