Compound microalloy hot die steel with high heat resistance and preparation method thereof

A technology of hot work die steel and microalloying, which is applied in the field of die steel manufacturing technology, can solve the problems of low comprehensive performance level of hot work die steel, low quality of domestic alloy die steel, easy cavity collapse or deformation, etc., to achieve High hardness, strong market adaptability, and excellent impact toughness

Inactive Publication Date: 2010-05-19
SHANGHAI UNIV
View PDF0 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The quality of domestic alloy die steel is low, and the comprehensive performance level of hot work die steel is not high
For example, although the thermal strength of 3Cr2W8V steel is high, the toughness is insufficient, and the fracture occurs from time to time when the mold is used.

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
  • Compound microalloy hot die steel with high heat resistance and preparation method thereof
  • Compound microalloy hot die steel with high heat resistance and preparation method thereof
  • Compound microalloy hot die steel with high heat resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] Example 1

[0033] In this embodiment, the composition and weight percentages of hot working die steel are as follows: C 0.32%, Si 1.53%, Mn 0.23%, Cr 4.25%, Mo 2.92%, V 0.99%, Nb 0.06%, rare earth elements ( Ce+La) 0.086, P 0.011%, S<0.016%, Fe balance.

[0034] In this embodiment, the process and steps of hot working die steel are as follows:

[0035] (1) Induction smelting: induction smelting according to the designed alloy element ratio, adding rare earths, and then casting into φ80mm electrode rods;

[0036] (2) Electroslag remelting: Put the smelted and cast electrode rods into the electroslag remelting device for secondary refining; use current to generate resistance heat through the electroslag layer to melt the consumable electrode alloy steel base material, liquid The metal falls in the form of droplets through the slag layer of the slag pool into the water-cooled crystallizer below, and then re-solidifies into a steel ingot of φ160mm about 70Kg;

[0037] (3) High-tem...

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

PropertyMeasurementUnit
Room temperature impact toughnessaaaaaaaaaa
Hardness valueaaaaaaaaaa
Login to view more

Abstract

The invention relates to a compound microalloy hot die steel material with high heat resistance and a preparation method thereof, belonging to the technical field of the manufacture process of die steel. The invention is characterized by comprising the following components by weight percent: 0.25% to 0.4% of C, 1.0% to 1.8% of Si, 0.01% to 0.3% of Mn, 3.5% to 5.0% of Cr, 2.0% to 3.5% of Mo, 0.8% to 1.5% of V, 0.03% to 0.07% of Nb, 0.05% to 0.1% of rare earth element (Ce+La), less than 0.02% of P, less than 0.02% of S and the balance of Fe. The preparation method of the hot die steel comprises the process of: (1) adding rare earth after melting; (2) remelting electroslag; (3) homogenizing at high temperature; (4) forging and dissolving solid; (5) spheroidizing annealing; and (6) heating to finally prepare the hot die steel. The hot die steel has the advantages of high purity, high heat resistance, good heat stability and excellent heat fatigability.

Description

technical field [0001] The invention relates to a composite microalloyed high heat strength hot work die steel and a preparation method thereof, belonging to the technical field of die steel manufacturing technology. Background technique [0002] Among the many failure factors of the mold, the failure caused by the quality of the mold material and the improper manufacturing process of the mold account for about 70%. It can be seen that the mold material is one of the important factors that determine the quality of the mold. With the development of the mold industry to the high-end level, it is bound to put forward higher and stricter requirements on the performance (strength and toughness) of the mold or mold material. [0003] The quality of domestic alloy die steel is low, and the comprehensive performance level of hot work die steel is not high. For example, although the thermal strength of 3Cr2W8V steel is high, its toughness is insufficient, and fractures occur from ti...

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): C22C38/26C22B9/18C21D6/00C21D1/32C21D1/25
Inventor 吴晓春佟倩张洪奎
Owner SHANGHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products