The control of raw materials from the following aspects:

1, macro test
Chemical composition to ensure the performance of steel is decisive, but qualified components, can not fully to illustrate the performance of the steel, due to the inhomogeneity of the internal organization of the steel and chemical composition, macro test in a large extent complements the deficiencies in this.

The macro test can observe the crystallization of the steel, the destruction of the continuity of the steel and the inhomogeneity of some components.

Standard "low power structure of the structure of the organization defect rating map" GB1979

8 kinds of common defects: macro segregation, porosity, inclusion, shrinkage, bubbles, cracks, flaking, folding.

2.1, the evaluation of annealing

The purpose of annealing, reduce the hardness of the steel, easy to machine, but also for the subsequent heat treatment for tissue preparation.

The annealing microstructure of carbon tool steel is evaluated according to the first grade rating chart of GB1298.

2.2, carbide inhomogeneity

Cr12 type of austenitic steel, the organization of a large number of eutectic carbide, carbide inhomogeneity on the use of performance has a very important impact, so the distribution of its carbide must be strictly controlled.

Altogether, due to the production of mold production factory and workshop is complicated, and how much is single piece and small batch, so as to mold production quota formulation and management brings certain difficulty, coupled with the factory and workshop mode of production, equipment, technology and quality and not too, so the quota, must according to the actual situation of the factory and workshop, and find out the appropriate methods to develop advanced and reasonable time quota, to improve labor productivity.