Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of austenitic hot work die steel and its heat treatment process

A technology of hot-working die steel and austenite, which is applied in the field of metallurgical casting, can solve problems such as poor high-temperature thermal stability, achieve the effects of improving thermal strength, increasing high-temperature strength, and reducing raw material costs

Active Publication Date: 2017-10-31
HUBEI SHANGDA MODEL MATERIAL TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problem of poor high-temperature thermal stability existing in the prior art, and provide an austenitic hot-working die steel with good high-temperature thermal stability and its heat treatment process

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
  • A kind of austenitic hot work die steel and its heat treatment process
  • A kind of austenitic hot work die steel and its heat treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] see figure 1 , figure 2 , an austenitic hot work die steel, the composition and mass percentage of the die steel are: C: 0.75%, Si: 0.95%, Mn: 12.3%, Cr: 0.70%, Mo: 0.90%, V: 1.70 %, N: 0.030%, Y: 0.05%, P: 0.015%, S: 0.007%, and the balance is Fe.

[0048] A heat treatment process for austenitic hot work die steel, comprising the following steps:

[0049] a. Perform homogenization annealing on the steel ingot of the mold steel: homogenization annealing temperature: 1300°C, holding time: 8 hours; forging into a blank, blank annealing: annealing temperature: 930°C, holding time: 5 hours;

[0050] B, with above-mentioned blank solution treatment: solution temperature is 1350 ℃, and holding time is 0.5 hour;

[0051] c. Aging treatment of the blank after solution treatment: the aging temperature is 800° C., and the aging time is 5 hours. At this time, the heat treatment of the mold steel is completed.

[0052] 7×10×55 mm of the above die steel 3 The room temperature...

Embodiment 2

[0054] An austenitic hot work die steel, the composition and mass percentage of the die steel are: C: 0.72%, Si: 1.05%, Mn: 13.2%, Cr: 0.75%, Mo: 1.00%, V: 1.65% , N: 0.040%, Y: 0.09%, P: 0.019%, S: 0.006%, and the balance is Fe.

[0055] A heat treatment process for austenitic hot work die steel, comprising the following steps:

[0056] a. Perform homogenization annealing on the steel ingot of the mold steel: homogenization annealing temperature: 1350°C, holding time: 8 hours; forging into a blank, blank annealing: annealing temperature: 910°C, holding time: 4 hours;

[0057] B, with above-mentioned blank solid solution treatment: solid solution temperature is 1300 ℃, and holding time is 1 hour;

[0058] c. Aging treatment of the blank after solution treatment: the aging temperature is 750° C., and the aging time is 4 hours. At this time, the heat treatment of the mold steel is completed.

[0059] 7×10×55 mm of the above die steel 3 The room temperature impact energy of t...

Embodiment 3

[0061] An austenitic hot work die steel, the composition and mass percentage of the die steel are: C: 0.80%, Si: 0.99%, Mn: 13.8%, Cr: 0.60%, Mo: 0.80%, V: 1.40% , N: 0.043%, Y: 0.04%, P: 0.017%, S: 0.005%, and the balance is Fe.

[0062] A heat treatment process for austenitic hot work die steel, comprising the following steps:

[0063] a. Perform homogenization annealing on the steel ingot of the mold steel: homogenization annealing temperature: 1300°C, holding time: 8 hours; forging into a blank, blank annealing: annealing temperature: 900°C, holding time: 4 hours;

[0064] B, with above-mentioned blank solution treatment: solution temperature is 1250 ℃, and holding time is 1 hour;

[0065] c. Aging treatment of the blank after solid solution treatment: the aging temperature is 800° C., and the aging time is 2 hours. At this time, the heat treatment of the mold steel is completed.

[0066] 7×10×55 mm of the above die steel 3 The room temperature impact energy of the unn...

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 discloses austenite hot-work mold steel. The mold steel comprises, by mass, 0.72%-0.80% of C, 0.90%-1.10% of Si, 11.0%-15.0% of Mn, 0.60%-0.90% of Cr, 0.80%-1.20% of Mo, 1.40%-1.80% of V, 0.030%-0.050% of N, 0.02%-0.10% of Y, less than 0.020% of P, less than 0.008% of S and the balance Fe. According to a heat treatment process of the austenite hot-work mold steel, a steel ingot is first processed with homogenizing annealing and annealed after the steel ingot is forged to a workblank; and then the workblank is processed with solution treatment at the temperature of 1250 DEG C-1400 DEG C for a half hour to an hour and aging treatment at the temperature of 750 DEG C-800 DEG C for two hours to six hours. The hot-work mold steel is not only little in total alloy content and low in manufacturing cost but also good in high temperature stability and long in service life.

Description

technical field [0001] The invention relates to the field of metallurgical casting, in particular to an austenitic hot work die steel and a heat treatment process thereof, which is particularly suitable for improving the high temperature thermal stability of the die steel. Background technique [0002] The service temperature of traditional martensitic hot work die steel generally does not exceed 700°C, such as H13, HD, etc. Since the matrix of austenitic hot work die steel is a single austenite, there is no problem of matrix decomposition and softening during high-temperature service. If the matrix and precipitates are properly controlled, it can be used above 700°C and maintain good hardness and toughness. The formation of the austenite matrix requires the addition of alloying elements that stabilize austenite, and because the austenite matrix is ​​soft, it is also necessary to add second phase-forming elements that strengthen the matrix. The existing austenitic die steel...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/18C22C38/04C22C38/12C22C38/02C21D1/26
CPCC21D1/26C22C38/001C22C38/005C22C38/02C22C38/04C22C38/12C22C38/18
Inventor 李民华
Owner HUBEI SHANGDA MODEL MATERIAL TECH