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Die steel machining technology

A processing technology and steel technology, applied in the field of mold steel processing technology, can solve problems such as high brittleness and mold failure, and achieve the effect of improving strength and toughness and preventing premature fracture failure

Inactive Publication Date: 2018-04-03
重庆向阳仪器有限公司
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Problems solved by technology

However, the obvious disadvantage of this steel is its high brittleness, which often leads to early failure of the mold

Method used

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Embodiment Construction

[0013] Below in conjunction with embodiment the present invention will be further described, and its operating steps are as follows:

[0014] A kind of die steel processing technology, material is 3Cr2W8, and this processing method comprises the following steps:

[0015] (1) Forging process: preheating temperature 780°C-850°C, heating temperature 950°C-210°C, initial forging temperature 1050°C-210°C, final forging temperature 850°C-950°C, slow cooling; during forging, repeat The pier is rough and long for not less than 3 times; during the forging process, when the temperature is greater than 1050°C, lightly strike; when the temperature is 970-1050°C, heavy strike; when the temperature is <970°C, lightly strike;

[0016] (2) Spheroidizing annealing process: heating and heating to 860°C at a rate of ≤90°C / h, cooling to 750°C at a rate of 25-30°C / h, and then cooling to a furnace at a rate of 10-15°C / h Cool at 600°C, then air-cool after taking out the oven;

[0017] (3) Rough pr...

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PUM

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Abstract

The invention discloses a mold steel processing technology, the material is 3Cr2W8, which is characterized in that the processing method comprises the following steps: (1) forging process; (2) spheroidizing annealing process; (3) rough processing; (4) Quenching and tempering; (5) Semi-finishing; (6) Heat treatment; (7) Finishing; (8) Polishing; (9) Stress relief tempering. The die steel processing technology of the present invention can improve its strength and toughness by standardizing the requirements of each step, parameter conditions and precautions, and prevent premature fracture and failure of the die.

Description

technical field [0001] The invention belongs to the field of mold steel processing technology, in particular to a mold steel processing technology. Background technique [0002] 3Cr2W8 steel is one of the cold work die steels widely used in China. This steel has the advantages of good hardenability, high hardness, wear resistance, and small heat treatment deformation. Extrusion die, etc. However, the obvious disadvantage of this steel is its high brittleness, which often leads to early failure of the mold. Therefore, how to improve its strength and toughness and prevent premature fracture and failure of the mold is a problem that users of this steel often encounter and need to solve. The mold failure analysis shows that the heat treatment factor has the greatest influence, accounting for about 50%. In view of the existing defects in the process, in order to ensure product quality, it is necessary to make further improvements. Contents of the invention [0003] In view ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00C21D1/18C21D1/773C21D1/32
CPCB23P15/00C21D1/18C21D1/32C21D1/773
Inventor 刘存福
Owner 重庆向阳仪器有限公司
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