We offer thermal (heat) treatment services to toughen or soften your copper / copper alloy products. The most commonly requested procedures requested by our clients are the solubilized and aged thermal treatment types. We offer vacuum tempering services, with methods designed to achieve the quality and hardness required for your parts. Our German-technology furnaces guarantee you a homogeneous hardness due to their rapid cooling, utilizing high-purity nitrogen. Through a process of stepped heating, which maintains temperature homogeneity of up to +/- 5 °C in all the treated material, we can guarantee minimum deformation and optimum quality surface finishes, depending on the geometry and cross sections of the pieces, thus representing great savings in materials and machining times.
The purpose of this process is to reduce the stress imparted upon the parts being produced, whether generated during the machining operations, or by the complex geometries of the parts themselves. In accordance with the steps of each form of machining, this process can be carried out in intermediate points of the production, until reaching the dimensions that, with tolerance, will achieve its mettle point, thus reducing the dimensional change that could take place at the moment of being submitted to subsequent thermal processes.
The heat treatment of annealing is used mainly so as to be able to machine materials with high grades of hardness. The process consists of heating a piece to a specific temperature, usually between 700 and 870 °C, maintaining the temperature for a specific time, and then allowing its cooling at a sufficiently low rate so as to guarantee that the material (generally tool grade steels) has undergone no previous thermal treatment, (also known as distempering).
This process consists of heating steel to a specific temperature (called austenization), and subsequently subjecting the steel to a rapid cooling process so as to achieve the required crystalline change in the material, thus providing the mechanical properties necessary for its final use. The constituent that results from this thermal process is the martensite, which provides the property of hardness in the steels, together with the carbides and other constituents that leave the solid solution (also known as ‘slag’) of the steels to be tempered. This process is then followed by a second stage, known as the tempering process, since the condition of the steel after this initial process is strong, yet fragile.
The tempering process follows the aforementioned (temper) process so as to alleviate the stress created in the first stage, and thus complete the transformation process and attain the required strength of the metal for its use in each specific tool. After completing the two stages, the resulting metal possesses the best possible properties for the production of your tools; this process is performed at a much lower temperature than that used in the austenization process, usually between the range of 180 to 650 °C.
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