1.2080 Tool Steel

1.2080 TOOL STEEL / x210 cr12 steel

1.2080 STEEL GRADE COMPARISON AND CHEMICAL COMPOSITION COMPARISON

APPLICATION

1.2080 steel is a high carbon and high chromium cold work die steel with high wear resistance and long service life. 1.2080 steel is suitable for various cold stamping dies, blanking dies, cold extrusion dies, cold rolling dies, wire drawing dies, wire rolling plates, cold cutting scissors, woodworking blades, drill sleeves, stretching cones, precision gauges, and other complex and potentially deformable tool dies.

Heat Treatment Process of 1.2080 Cold Working Die Steel

1.2080 steel is mainly used for processes such as punching, stretching, bending, cold extrusion, cold heading, wire rolling, and bending of metal or non-metallic materials. Therefore, it is required that the mold has high strength, high wear resistance, and sufficient toughness to ensure its service life. 1.2080 steel is widely used as a universal cold working mold in mass production, and there are usually two heat treatment methods: primary hardening method (low quenching+low recovery) and secondary hardening method (high quenching+high recovery).

The quenching temperature of the one-time quenching method is 1020~1040 degrees, and the tempering temperature can be selected according to the requirements of the 1.2080 steel mold. Generally speaking, cold stamping molds that require high hardness and wear resistance can be tempered at a low temperature of 160-180 degrees, and the hardness after tempering can reach HRC60 or above. For stamping dies that require high hardness and certain toughness of 1.2080 steel, tempering at 250-270 degrees can be used, and the hardness after tempering can reach HRC58-60. For molds that can withstand high impact toughness, high-temperature tempering at 520 degrees can be used, and the hardness after tempering is HRC55-57.

The quenching temperature for the secondary hardness method of 1.2080 steel is 1080-1120 degrees. Due to the presence of a large amount of residual austenite in quenched steel, the hardness is relatively low (HRC42-45). Through multiple (3-5 times) high-temperature tempering, residual austenite transforms into martensite, leading to secondary hardening. 1.2080 steel hardness can be increased to HRC59-64, mainly suitable for mold parts that require red hardness. The disadvantage is poor impact toughness, which affects the service life of multiple punch heads, making it unsuitable for cold working molds.

1.2080 steel uses low-temperature tempering in a single hardening method. Although the hardness can reach HRC60 or above, the tempering temperature is relatively low, and the stress release after quenching is insufficient. In addition, in the subsequent processing of 1.2080 steel, the surface hardness of the workpiece is easily reduced due to grinding heat, which affects its service life.

Therefore, 1.2080 steel adopts the method of medium temperature quenching+high temperature tempering, which is about 1050 degrees Celsius quenching, and the hardness after quenching is HRC63. Then conduct high-temperature tempering within the temperature range of 500 to 520 ℃. Due to the fact that the hardness after secondary hardening and tempering can reach HRC60 or higher, the quenching temperature using this process is lower than that of the secondary hardening method. After heat treatment, 1.2080 steel has higher strength and some toughness. In addition, due to sufficient stress release after high-temperature tempering, it is not easy to crack in subsequent wire cutting discharge machining, and is not easy to anneal during grinding. The surface can be coated with titanium, which has been applied in production to a certain extent.