Die Die Life of
Die
Die Life of a mold material properties, chemical composition, structure,
hardness and comprehensive reflection of metallurgical quality. Among them, Precision stamping parts the material properties and heat treatment affect the
quality of the most obvious.
Mold
material properties on the impact of die life is great. If the same workpiece,
using a different mold material of the bending test, the test results: The
9Mn2V material, the life of 5 million; with Crl2MoV nitriding, the life of up
to 40 million. Therefore, the choice of materials, the batch size should be
based on workpiece, rational use of mold materials. The hardness of the die
parts to Die Life a great impact. But not the higher hardness, longer die life.
This is because the hardness and strength, toughness and abrasion resistance
are closely related. Some die demands of high hardness, long life. Such as the
use of T10 steel dies, hardness 54 ~ 58HRC, only washed thousands of times a
burr on the workpiece great. Precision stamping partsIf the hardness to 60 ~ 64HRC, the grinding life of up
to 2 to 3 million. However, if continue to improve hardness, fracture occurs
earlier. Some die hardness should not be too high, as the die manufacturing
using Crl2MoV 58 ~ 62HRC hardness, the general life of 2-3 million, invalid
form of chipping and cracking, and if the hardness down to 54 ~ 58HRC, life
expectancy increased to 5 ~ 60 000, but decreased to 50 ~ 53HRC hardness
appears easy to blunt the die edge phenomenon.
Thus, Precision stamping partsmold hardness must be
based on material properties and failure modes may be. Should enable the
hardness, strength, toughness and wear resistance, resistance to fatigue
strength needed to achieve a particular stamping process the best match.
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