Koldarbejdsstål

Koldarbejdsstål refers to a category of tool steels designed for applications at or near room temperature, distinguishing them from hot-work steels used at elevated temperatures. These steels are characterized by their high hardness, wear resistance, and toughness, making them suitable for shaping and cutting materials like metal, plastic, and wood.

The primary alloying elements in koldarbejdsstål include carbon, chromium, molybdenum, vanadium, and tungsten. Carbon content is typically high, contributing to hardness, while chromium enhances hardenability and corrosion resistance. Molybdenum and vanadium improve red hardness and wear resistance, respectively. Tungsten also contributes to hardness and wear resistance.

Common types of koldarbejdsstål include high-carbon, high-chromium steels (e.g., D2, D3), which offer excellent wear resistance but can be brittle; oil-hardening steels (e.g., O1), which are versatile and easy to heat treat; and air-hardening steels (e.g., A2), providing good toughness and dimensional stability after heat treatment.

The selection of a specific koldarbejdsstål depends on the intended application, considering factors such as the material being worked, the forces involved, and the required service life. Proper heat treatment, including hardening and tempering, is crucial to achieve the desired properties and performance in koldarbejdsstål components.