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High heat-resistant 4Cr3Mo3W4VNb hot work die steel

A hot work die steel, high heat resistance technology, applied in the direction of improving process efficiency, can solve problems such as insufficient hard phase resistance, achieve high red hardness, small thermal wear, and reduce production costs.

Inactive Publication Date: 2019-10-11
湖北长怡特殊材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high heat resistance 4Cr3Mo3W4VNb hot work die steel in order to solve the problem of insufficient resistance to the hard phase in the 3003 Al-Mn alloy in the working face of the traditional die

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] This example is a high heat-resistant 4Cr3Mo3W4VNb hot work die steel, the die steel contains the following components by weight percentage: C: 0.1%, Mn: 0.2%, Si: 0.4%, Cr: 2.0%, Mo: 1.2%, Nb: 1.0%, W: 0.8%, V: 0.8%, and the balance is Fe.

Embodiment 2

[0019] This example is a high heat-resistant 4Cr3Mo3W4VNb hot work die steel, the die steel contains the following components by weight percentage: C: 0.3%, Mn: 0.6%, Si: 0.6%, Cr: 2.5%, Mo: 1.8%, Nb: 1.5%, W: 1.2%, V: 1.2%, and the balance is Fe.

[0020] The manufacturing process of die steel described in embodiment 1 and embodiment 2 comprises the following steps:

[0021] (1) Smelting: melting steel scrap, tungsten-chromium-molybdenum alloy and vanadium-niobium-silicon alloy with a carbon content less than 0.3% to obtain molten steel;

[0022] (2) Refining outside the furnace: refining the molten steel in a vacuum state;

[0023] (3) Molten steel casting forming steel rods: inject the molten steel refined outside the furnace into a steel rod mold with a temperature of 290-310°C, the casting temperature is 1490-1550°C, and stop heating after 30-40 minutes of heat preservation , until it is cooled and released from the oven;

[0024] (4) Electroslag remelting: carrying ou...

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Abstract

The invention discloses high heat-resistant 4Cr3Mo3W4VNb hot work die steel which is prepared from the following components including, by weight, 0.1%-0.3% of C, 0.2%-0.6% of Mn, 0.4%-0.6% of Si, 2.0%-2.5% of Cr, 1.2%-1.8% of Mo, 1.0%-1.5% of Nb, 0.8%-1.2% of W, 0.8%-1.2% of V and the balance Fe. The high heat-resistant 4Cr3Mo3W4VNb hot work die steel disclosed by the invention is long in servicelife and particularly small in heat wear.

Description

technical field [0001] The invention relates to the technical field of hot work die steel, in particular to a high heat resistance 4Cr3Mo3W4VNb hot work die steel. Background technique [0002] When the mold made of conventional 4Cr 5Mo Si V1 hot work die steel material is used to hot-extrude 3003 aluminum-manganese alloy profiles, since the 3003 series aluminum-manganese alloy contains the second phase of AlMnFe and MnAI6 with high hardness, among them, the second phase of AlMnFe The microhardness of the two phases is 704HV, which exceeds the heat treatment quenching hardness of the mold, and the microhardness of the second phase of MnAl6 is 540HV; thus, after the nitriding of the mold, the upper machine extrudes 3003 aluminum-manganese alloy profiles between 470-520°C At this time, the high hardness AlMnFe and MnAI6 second phases in the 3003 Al-Mn alloy rubbed violently with the working belt of the mold, causing abrasive wear on the working surface of the mold, and then th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/22C22C38/24C22C38/26C22C38/02C22C38/04C22C33/04C22B9/18C21D8/00
CPCC21D8/005C22B9/18C22C33/04C22C38/02C22C38/04C22C38/22C22C38/24C22C38/26Y02P10/20
Inventor 陈俊波刘鹏涛卢敏
Owner 湖北长怡特殊材料科技有限公司
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