Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Modified 4Cr5MoSiV1 hot work die steel and preparation method thereof

A modification technology for hot work die steel, which is applied in the direction of metal processing equipment, etc., can solve the problems of hot work dies such as poor service conditions, poor secondary hardening ability, and small heat treatment deformation, so as to increase the yield of rare earths and reduce branches. Effect of crystal segregation and improvement of as-cast structure

Active Publication Date: 2022-02-01
INNER MONGOLIA UNIV OF SCI & TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although its comprehensive performance is very outstanding, its secondary hardening ability in tempering is poor. When the service temperature is higher than 540°C (1000°F), the hardness will drop rapidly, and the deformation of heat treatment is small
[0004] Moreover, with the widespread application of high-speed, high-load, high-precision die forging equipment and high-strength toughness forgings, the service conditions of hot work dies are more severe, and the existing 4Cr5MoSiV1 hot work die steel will also fail due to the above reasons during use , for this reason, the present invention proposes a kind of modified 4Cr5MoSiV1 hot work die steel and its preparation method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modified 4Cr5MoSiV1 hot work die steel and preparation method thereof
  • Modified 4Cr5MoSiV1 hot work die steel and preparation method thereof
  • Modified 4Cr5MoSiV1 hot work die steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This embodiment provides a method for preparing a modified 4Cr5MoSiV1 hot work die steel, comprising the following steps:

[0040] S1, according to the following weight percentages, weigh each preparation raw material respectively:

[0041] C: 0.35%, Si: 1.18%, Mn: 0.46%, Cr: 4.88%, Mo: 1.57%, V: 1.19%, cerium-iron alloy 0.3%, and the balance is Fe.

[0042] S2, first place the weighed Fe, Cr, Mo, V in a vacuum furnace, smelt at 1500°C until melting, then add the weighed Si, C, keep it at 1650°C for 5min, then add the weighed Continue to smelt good rare earth alloys, control the residual amount of rare earth elements in the steel to 0.018%, and control the oxygen content in the steel to 20ppm;

[0043] S3, weigh Al according to 0.1% of the total amount of each preparation raw material, and add it into the vacuum furnace after S2 smelting, control the temperature at 1500 ° C for 5 minutes, and then cast it under the protection of argon to ensure that the oxygen in the s...

Embodiment 2

[0050] This embodiment provides a method for preparing a modified 4Cr5MoSiV1 hot work die steel, comprising the following steps:

[0051] S1, according to the following weight percentages, weigh each preparation raw material respectively:

[0052] C: 0.32%, Si: 0.8%, Mn: 0.2%, Cr: 4.75%, Mo: 1.10%, V: 0.8%, cerium-iron alloy 0.1%, and the balance is Fe.

[0053] S2, first place the weighed Fe, Cr, Mo, V in a vacuum furnace, smelt at 1550°C until melting, then add the weighed Si, C, keep it at 1600°C for 7min, then add the weighed Continue to smelt good rare earth alloys, control the residual amount of rare earth elements in the steel to 0.001%, and control the oxygen content in the steel to 15ppm;

[0054] S3, weigh Al according to 0.05% of the total amount of each preparation raw material, and add it into the vacuum furnace after S2 smelting, control the temperature at 1450 ° C for 3 minutes, and then cast it under the protection of argon to ensure that the oxygen in the ste...

Embodiment 3

[0061] This embodiment provides a method for preparing a modified 4Cr5MoSiV1 hot work die steel, comprising the following steps:

[0062] S1, according to the following weight percentages, weigh each preparation raw material respectively:

[0063] C: 0.45%, Si: 1.2%, Mn: 0.5%, Cr: 5.50%, Mo: 1.75%, V: 1.2%, cerium-iron alloy 0.5%, and the balance is Fe.

[0064] S2, first place the weighed Fe, Cr, Mo, V in a vacuum furnace, smelt at 1600°C until melting, then add the weighed Si, C, keep it at 1700°C for 7min, then add the weighed Continue to smelt good rare earth alloys, control the residual amount of rare earth elements in the steel to 0.02%, and control the oxygen content in the steel to 18ppm;

[0065] S3, weigh Al according to 0.15% of the total amount of each preparation raw material, and add it into the vacuum furnace after S2 smelting, control the temperature at 1550 ° C for 7 minutes, and then cast it under the protection of argon to ensure that the oxygen in the stee...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of hot work die steel, and discloses modified 4Cr5MoSiV1 hot work die steel and a preparation method thereof.The preparation method comprises the following steps: putting weighed raw materials into vacuum furnace, smelting to molten state, adding reducing agent, smelting at 1450-1550 DEG C, casting under argon protection, and naturally cooling after casting to obtain steel ingot; remelting the steel ingot by using a protective atmosphere electroslag remelting technology, preserving heat at 1250 DEG C, forging and cooling; and carrying out heat preservation at 850 DEG C, and then carrying out segmented furnace cooling to room temperature, so as to obtain the modified 4Cr5MoSiV1 hot work die steel. By adding the rare earth intermediate alloy and utilizing the interaction of all the components, the yield of rare earth in the steel is increased; segregation of alloy elements such as Cr, Mo and V at the grain boundary is reduced, and the purpose of reducing dendritic segregation is achieved; and the as-cast structure of the steel is improved, and the fatigue life and other mechanical properties of the steel are improved.

Description

technical field [0001] The invention relates to the technical field of hot work die steel, in particular to a modified 4Cr5MoSiV1 hot work die steel and a preparation method thereof. Background technique [0002] At present, in order to avoid failure forms such as fracture, plastic deformation, wear, softening, and fatigue in the process of processing and forming hot-working molds, it is required that the hot-working mold materials have excellent strength, toughness, plasticity, wear resistance, and Temper softening properties. [0003] 4Cr5MoSiV1 hot work die steel (namely H13 steel) has excellent hardenability, good toughness, high wear resistance, good thermal fatigue, etc., so it is often used as hot forging die steel. Although its comprehensive performance is very outstanding, its secondary hardening ability in tempering is poor. When the service temperature is higher than 540°C (1000°F), the hardness drops rapidly, and the deformation of heat treatment is small. [0...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22C33/06C22C38/02C22C38/04C22C38/22C22C38/24B21J5/00
CPCC22C33/06C22C38/02C22C38/04C22C38/22C22C38/24C22C38/005B21J5/002
Inventor 杨礼林赵莉萍徐祺昊秦晨张慧敏
Owner INNER MONGOLIA UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com