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Method for producing 4Cr5Mo2V hot work die steel

A technology of hot work die steel and production method, applied in the field of metallurgy, can solve problems affecting the ductility and toughness of steel ingots, cracks, cracking of 4Cr5Mo2V hot work die, etc., and achieve the effect of ensuring ductility and toughness and avoiding cracking.

Inactive Publication Date: 2014-02-05
北京会盛百模具材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in related technologies, the common production method is to directly carry out solid-state smelting operation on the obtained steel ingot, and the inside of the steel ingot generally contains a certain amount of insoluble carbides, and the existence of these carbides will affect the elongation of the steel ingot toughness, which in turn causes the processed 4Cr5Mo2V hot work mold to be prone to cracking or early cracking

Method used

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  • Method for producing 4Cr5Mo2V hot work die steel
  • Method for producing 4Cr5Mo2V hot work die steel
  • Method for producing 4Cr5Mo2V hot work die steel

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Embodiment 1

[0014] A kind of production method of 4Cr5Mo2V hot work die steel is provided in the embodiment of the present invention, comprises the following steps, please refer to figure 1 :

[0015] Step 101: Processing raw materials to obtain steel ingots;

[0016] In step 101, the raw material is processed through a series of processes to obtain a steel ingot. Specifically, the raw materials used may be steel scrap concentrates. In addition, in this step, care should be taken to control the content range of various elements in the raw materials in the smelting process, especially the range of copper content. Through practical experience, the chemical composition contained in the 4Cr5Mo2V hot work die steel of this embodiment The range can refer to Table 1;

[0017] Table 1 The range of chemical components contained in the 4Cr5Mo2V hot work die steel of this embodiment (weight percentage)

[0018]

[0019] Wherein, in the specific processing process, preferably, in order to ensu...

Embodiment 2

[0032] Preferably, in this embodiment, specifically, in step 102 of Embodiment 1, it may be specifically to keep the steel ingot at a temperature of 1280°C-1350°C for 20 hours-40 hours, so that the carbide contained inside Dissolved; homogeneous steel ingots were obtained.

[0033] Preferably, in step 101 of Embodiment 1, the following steps may be included, please refer to figure 2 :

[0034] Step 201: Smelting raw materials to obtain molten steel;

[0035] Step 202: deoxidizing molten steel to obtain deoxidized molten steel;

[0036] The molten steel obtained by smelting contains a large amount of oxygen, so it needs to be deoxidized. Specifically, the deoxidizer can be Al. After Al is added to the molten steel, it can be used as a reducing agent and then removed from the molten steel. Contains a lot of oxygen.

[0037] Step 203: vacuum degassing the deoxidized molten steel to obtain degassed molten steel;

[0038] During the vacuum degassing process, it is necessary t...

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Abstract

The invention relates to the technical field of metallurgy, and in particular relates to a method for producing 4Cr5Mo2V hot work die steel. The method comprises the following steps: processing a raw material so as to obtain steel ingots, heating the steel ingots for a reset time at a preset temperature so as to melt carbide inside the ingots to obtain homogenized ingots, and further processing the homogenized ingots so as to obtain the 4Cr5Mo2V hot work die steel. Due to adoption of the method for producing the 4Cr5Mo2V hot work die steel, the phenomenon that the machined 4Cr5Mo2V hot work die steel is cracked or fractured at early stage is avoided. In addition, in the process that the ingots are heated and the carbide inside the ingots is dissolved, the internal tissue inside the ingots is uniform, the stress of the internal tissue of the ingots is reduced, and macrosegregation can be eliminated to a certain extent.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a production method of 4Cr5Mo2V hot work die steel. Background technique [0002] 4Cr5Mo2V hot work die steel is a more commonly used hot work die steel. In related technologies, its common production process can include liquid metal smelting and solid metal smelting. Liquid metal smelting refers to obtaining steel ingots after a series of operations on raw materials; solid metal smelting refers to heat treatment and thermal processing of the obtained steel ingots, and then processed into the required finished products. [0003] However, in related technologies, the common production method is to directly carry out solid-state smelting operation on the obtained steel ingot, and the inside of the steel ingot generally contains a certain amount of insoluble carbides, and the existence of these carbides will affect the elongation of the steel ingot and toughness, which in turn c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/00
Inventor 冯英育
Owner 北京会盛百模具材料技术有限公司
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