Hot/cold work mold steel

4Cr4Mo3W1V1 steel, as a new type of hot work die steel, can achieve optimal strength toughness matching through reasonable quenching and tempering processes. The quenched microstructure of 4Cr4Mo3W1V1 steel mainly consists of martensite and undissolved carbides. As the quenching temperature increases, the carbides in 4Cr4Mo3W1-V1 steel gradually dissolve and the grain size gradually increases. The hardness of 4Cr4Mo3W1V1 steel quenched at 1100 ℃ reaches the maximum value of 62.4HRC. The hardness of 4Cr4Mo3W1V1 steel shows a trend of first increasing and then decreasing with the increase of tempering temperature, and the impact absorption energy shows a trend of first decreasing and then increasing. The hardness and impact absorption energy of 4Cr4Mo3W-1V1 steel quenched at 1100 ℃ and tempered at 600 ℃ reached 58.2HRC and 46J, respectively, with the best comprehensive performance.

Large section H13 mold steel is prone to segregation and internal problems, which affect the quality and service life of the mold. In response to this challenge, by precisely controlling the chemical composition of H13 mold steel, optimizing smelting, forging, and heat treatment processes, the uniformity of the microstructure has been successfully improved and the grain size has been refined, thereby enhancing the overall performance of large H13 mold steel.

Hot work die steel H13 is a commonly used medium carbon chromium hot work die steel. Due to its excellent high-temperature strength, wear resistance, and thermal fatigue resistance, it is widely used in the manufacture of die-casting molds, hot forging dies, etc.

Due to the presence of a large amount of eutectic carbides in high alloy tool steel with pearlite, sufficient fragmentation can only be achieved through significant deformation; On the other hand, due to the influence of its alloy composition, high alloy tool steel with martensite has low plasticity, high deformation resistance, poor thermal conductivity, and high tissue stress during cooling. It is prone to defects such as cracks in the forging production process. Thus creating a contradiction that complicates its forging process. Therefore, when formulating the forging process for this type of steel, corresponding technical measures should be developed from each link to address this contradiction and ensure the quality of its forgings.

Hot work tool steels, such as H11 (1.2343) and H13 (1.2344), play a critical role in various industrial applications, particularly where tools are subjected to high temperatures and harsh conditions. These steels are specifically engineered to withstand the intense thermal cycles, mechanical stresses, and abrasive wear that are typical in hot working processes, such as forging, casting, and extrusion.

Adding vanadium as an alloying element to 5CrNiMo die steel can refine its grain structure, improving its wear resistance and thermal fatigue performance. Forging can further refine the grain structure of the new vanadium-containing hot work die steel 5CrNiMoV sample, further enhancing the wear resistance and thermal fatigue performance of 5CrNiMoV die steel.