As an industrial manufacturing tool, die steel is very common. There are many types of die steel, so the function and applicability are different, so it is very important to choose the die steel with good quality and carry out the correct heat treatment. Today, Jinan mold will introduce the quality requirements of mold steel.

一、模具钢在冶金质量方面的要求

1、 Requirements of die steel in metallurgical quality

高的冶金质量才能发挥钢的基体本特性，模具钢的内部冶金质量与它的基本性能有同等的重要意义，在研究性能的同时，一定研究冶金质量影响因素。一般较常遇到模具钢的内外质量问题有以下几个方面：

Only high metallurgical quality can give full play to the basic characteristics of steel matrix. The internal metallurgical quality of die steel has the same significance as its basic properties. While studying the properties, we must study the influencing factors of metallurgical quality. Generally, the internal and external quality problems of die steel are as follows:

（1）化学成分的均匀性

(1) Uniformity of chemical composition

模具钢通常是含有多元素的合金钢，钢在锭模具中从液态凝固时，由于选分结晶的缘故，钢液中各种元素在凝固的结构中分布不均匀而形成偏析，这种化学成分的偏析将造成组织和性能的差异，它是影响钢材质量的重要因素之一。降低钢的偏析度，可以有用地提高钢的性能。近些年来，国内外很多冶金厂都在致力研究生产成分均匀、组织细化的钢材。

Die steel is usually an alloy steel containing multi elements. When the steel solidifies from liquid state in ingot mold, due to selective crystallization, various elements in the liquid steel are unevenly distributed in the solidification structure and form segregation. The segregation of chemical composition will cause differences in microstructure and properties, which is one of the important factors affecting the quality of steel. Reducing the segregation of steel can effectively improve the properties of steel. In recent years, many metallurgical plants at home and abroad are committed to producing steel with uniform composition and fine structure.

（2）钢中的非金属夹杂物

(2) Non metallic inclusions in steel

质量良好的钢材不仅化学成分要符合技术标准的规定，并且钢中的非金属夹杂物的含量要尽可能地少，因为非金属夹杂物在钢中所占的体积虽然很小，但对钢材的性能影响却很大。减少钢中的非金属夹杂物是炼钢的主要任务之一。

Good quality steel not only chemical composition to meet the technical standards, but also the content of non-metallic inclusions in the steel should be as small as possible, because the volume of non-metallic inclusions in the steel is very small, but it has a great impact on the performance of the steel. Reducing non-metallic inclusions in steel is one of the main tasks of steelmaking.

钢中的非金属夹杂物在基本种意义上呆以看成是一定尺寸的裂纹，它破坏了金属的连续性，引起应力集中，在外界应力的作用下，裂纹延伸很容易发展扩大而导致性能降低。

The non-metallic inclusion in steel can be regarded as a certain size crack in the basic sense. It destroys the continuity of metal and causes stress concentration. Under the action of external stress, the crack extension is easy to develop and expand, which leads to the performance degradation.

塑性夹杂物的存在，随着锻轧过程延展变形，致使钢材产生各向异性。同时夹杂物抛光过程中的剥落，提高了模具的表面粗糙度。因此，对于大型和重要的模具来说，提高钢的纯净度是十分重要的。

The existence of plastic inclusions, along with the forging and rolling process, causes the steel to produce anisotropy. At the same time, the surface roughness of the mold is improved by the spalling of inclusions in the polishing process. Therefore, for large and important die, it is very important to improve the purity of steel.

模具钢的有哪些质量要求？以上就是济南模具给大家介绍的模具钢相关知识，大家在选择具有优良质量的模具钢材并进行正确的热处理可以用以上几点作为参考。

What are the quality requirements of die steel? The above is the relevant knowledge of die steel introduced to you by Jinan die. You can use the above points as a reference when you choose the die steel with excellent quality and carry out the correct heat treatment.