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

Chromium steel series die steel and heat treatment technique thereof

A technology of die steel and chromium steel, which is applied in the field of chrome steel die steel and its heat treatment process, can solve the problems of high production cost, insufficient fine lines, short service life of the die, etc., and achieves reduced material cost, good quenching stability, The effect of saving usage

Inactive Publication Date: 2008-10-01
周向儒
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve Cr 8 Mo 2 V 1 When the mold made by Si is used, the lines are not fine enough, the service life of the mold is short, especially the defects of high production cost

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
  • Chromium steel series die steel and heat treatment technique thereof
  • Chromium steel series die steel and heat treatment technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A chrome-steel-based die steel, the die steel includes: carbon C1.3%, chromium Cr11.5%, molybdenum Mo05%, vanadium V0.5%, nickel Ni0.2%, tungsten W0.5% by weight percentage , silicon Si0.2%, manganese Mn0.2%, cobalt Co0.5%, niobium 0.3%, titanium 0.3%, rare earth elements 0.05%, sulfur S≤0.015%, phosphorus P≤0.02%, and the balance is iron Fe.

[0041] The heat treatment process of the above-mentioned chromium steel mold steel can be carried out in the following steps:

[0042] (1) Preheating for the first time, the preheating temperature is 550-650°C, and the preheating time is 60 minutes;

[0043] (2), the second preheating, the second preheating temperature is 800 ~ 900 ℃, and the preheating time is 45 minutes;

[0044] (3) Quenching heating, the quenching heating temperature is 1000-1040°C, the quenching time is: 25+material thickness / 2 (minutes), and then cooled in a salt bath; the salt bath cooling is graded and kept warm, and the holding temperature is 400-450°C ...

Embodiment 2

[0048] A chromium-steel-based die steel, which comprises: carbon C1.25%, chromium Cr11.3%, molybdenum Mo0.4%, vanadium V0.4%, nickel Ni0.1%, tungsten W0. 3%, silicon Si0.1%, manganese Mn0.1%, cobalt Co0.4%, sulfur S≤0.015%, phosphorus P≤0.02%, and the balance is iron Fe.

[0049] (1) Preheating for the first time, the preheating temperature is 550-650°C, and the preheating time is 60 minutes;

[0050] (2), the second preheating, the second preheating temperature is 800 ~ 900 ℃, and the preheating time is 45 minutes;

[0051] (3) Quenching heating, the quenching heating temperature is 1000-1040°C, the quenching time is: 25+material thickness / 2 (minutes), and then air-cooled to room temperature;

[0052] (4) For the first tempering, the tempering temperature is 200-220°C, the tempering time is 2.5 hours, and then air-cooled to room temperature;

[0053] (5) Tempering for the second time, the tempering temperature is 200-220°C, the tempering time is 2.5 hours, and then air-cool...

Embodiment 3

[0055] A chrome-steel-based die steel, which comprises: carbon C1.35%, chromium Cr12.0%, molybdenum Mo0.6%, vanadium V0.6%, nickel Ni0.3%, tungsten W0. 8%, silicon Si0.4%, manganese Mn0.4%, niobium 0.3%, titanium 0.3%, cobalt Co0.6%, rare earth elements 0.05%, sulfur S≤0.015%, phosphorus P≤0.02%, and the rest is iron Fe.

[0056] The heat treatment process of the above-mentioned chromium steel mold steel can be carried out in the following steps:

[0057] (1) Preheating for the first time, the preheating temperature is 550-650°C, and the preheating time is 60 minutes;

[0058] (2), the second preheating, the second preheating temperature is 800 ~ 900 ℃, and the preheating time is 45 minutes;

[0059] (3) Quenching heating, the quenching heating temperature is 1000-1040°C, the quenching time is: 25+material thickness / 2 (minutes), then oil cooling is adopted, and the oil cooling is graded for heat preservation, and the heat preservation temperature is 200-250°C.

[0060] (5) ...

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

This invention relates to a new style alloy tool steel, especially relates to a new style chrome steel system cold extrusion die steel and its heat treatment technique. The weight percentage of the elements is that carbon 1.2-1.5%, chrome 11-12.5%, molybdenum 0.3-0.8%, vanadium 0.3-0.8%, nickel 0.1-0.3%, tungsten 0.3-1.0%, silicon 0.1-0.4%, manganese 0.1-0.4%, cobalt 0.3-2%,sulfur not more than 0.015%, phosphor not more than 0.02%, the rest is iron. Compared to home made die steel C8M2V1S, lot of molybdenum is replaced by chrome, the production cost is reduced, its processability is good, easy to forging, hardenability is good, quenching stability is very good. The toughness and wear resistance are both better than home made die steel C8M2V1S, and the material cost is reduce for 5000 yuan every ton. It is one die material of large quantities continuous impact and pressure, especially for high viscosity material punching die and fine punching die. This invention also provides the heat treating technique of the die steel.

Description

technical field [0001] The invention relates to an alloy tool steel, in particular to a chromium steel mold steel and its heat treatment process. Background technique [0002] Compression molding has become the main processing method in the manufacturing industry, especially in household appliances and daily necessities. The working conditions and performance requirements of the mold vary widely, so different steels are selected for different service conditions. The performance-price ratio of steel for molds is a parameter to measure its economic benefits. In addition to requiring similar compression resistance (ie hardness) to other cold-working molds, cold extrusion molds also require the highest possible strength and toughness. For molds that process high-strength materials and require high life (as large as possible the number of stampings), fatigue resistance is especially required. Fatigue cracks originate from tiny defects in steel exposed to the surface, and gradual...

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): C22C38/52C21D11/00C21D1/18C21D1/56
Inventor 周向儒赵春华廖德秀宋利秋
Owner 周向儒