What is the importance of new mold steel to die casting molds

What is the importance of new mold steel to die casting molds

Most die-casting molds are complex in design and costly, so molds are required to have a long service life, so mold steel becomes the top priority. Although the cost of materials and heat treatment only accounted for 10-15% of the production cost of the entire die-casting mold, it has a decisive impact on the overall life of the mold. So what is the importance of new mold steel to die casting molds? Today I will analyze and analyze for everyone.

Generally speaking, there are the following three most common hot work die steels in the European die casting industry:

◆h11(1.2343), this material concentrates the two characteristics of high hardness and high toughness, which meets many requirements of hot work die steel;

◆ h13 (1.2344) is the standard steel grade in the United States. Compared with h11 steel, this material contains a higher content of carbon and vanadium, which provides stronger wear resistance, but relatively weakened toughness;

◆1.2367 is quite common in the European market. This material is characterized by significantly improved thermal mutation resistance.

The main alloy components of all three martensitic hot work die steels are chromium, molybdenum and vanadium. In order to meet today’s higher and higher mechanical performance requirements, they are all melted by electroslag remelting process.https://retractable-dog-leash.com/

H11 steel provides the best toughness, 1.2367 steel provides the best high temperature resistance. The former is suitable for situations where the stress cracking risk is greater, and the latter is suitable for situations where the thermal cracking risk is greater.

The tq1 material newly researched and developed by the German kind company successfully combines the high toughness and high temperature mutation resistance of these two steels. Its chemical composition embodies the most advanced technological research results in Europe. It not only contains extremely low phosphorus and sulfur content, but also the indicators of harmful trace elements such as aluminum, boron, copper and zinc have reached the minimum standards.https://chineselasercutter.com/

Through advanced electroslag remelting smelting process, tq1 has reached the highest level of purity, concentrated on the highest toughness and the best thermal fatigue resistance, all of these characteristics ensure the longest life of the mold. Another characteristic that determines the life of the mold is the transformation behavior of the steel, which is the ability to inhibit the formation of bainite. Bainite is a hard and brittle structure, which will cause the core part of the large mold to be cooled insufficiently and fail to form the desired martensite transformation. The bainite conversion of tq1 is 25 minutes later than that of h11 material, which means that the heat treatment is easier to carry out.

In view of the good high temperature resistance of tq1, molds produced with tq1 materials have much stronger resistance to thermal pressure during operation and operation than h11 molds. https://plasticmachiningservice.com/Compared with h11 mold, tq1 mold also has significant advantages in high temperature resistance, toughness, thermal expansion and thermal conductivity.

Tq1 is not only suitable for double-sided forging bars, but also for six-sided individually forged blocks. The three-dimensional forging process accepts strong plastic deformation and provides super isotropy and toughness. Three-dimensional forging materials also show their advantages in the heat treatment process. In a piece of three-dimensional forged material, the difference in microstructure is much smaller than that of a two-sided forged material. Generally speaking, this process is processed according to the size required by the user.

The material quality of hot work steel can not only be reflected in the life of the mold, but also in the quality of the die casting.

The picture above is a very typical example: German Mercedes-Benz has made a two-cavity mold for its transmission. https://led-heatsink.net/The core materials are tq1 and h11. The picture shows the cracking condition of the h11 mold at the same location before it is finally scrapped. The final life of the tq1 material mold has reached more than twice that of the h11 material.

Most die-casting molds are complicated in design and costly, so the molds are also required to have a long service life.

The material quality of hot work steel can not only be reflected in the life of the mold, but also in the quality of the die casting.