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Low-phosphorus-sulfur rare-earth alloy steel for one-time forming mold of cold stamping nut and preparation method thereof

A technology for forming molds and alloy steels, applied in the field of cold stamping rare earth alloy mold steel materials and their preparation, and materials for cold stamping molds, can solve the problems of insufficient deep processing and retention, and achieve improved metal utilization, improved service life, and improved productivity effect

Active Publication Date: 2020-07-17
绍兴蓝之印家纺有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, whether it is bar or plate, forging and flat steel, most of them still stay in the stage of crude steel, and the deep processing is not enough. There is a certain gap between my country's equipment manufacturing industry and the strategic goal of high-quality mold steel proposed by the standard parts industry and the international advanced level.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A low-phosphorus-sulfur rare-earth alloy steel for cold-stamping nut primary molding dies and its preparation process. According to the mass percentage, the composition is: C0.81%, Cr4.00%, Si0.2%, Mn0.2%, W6 .50%, Mo 4.8%, V1.80%, Co0.80%, Ni0.15%, Cu0.08%, Nb0.01%, Ce0.01%, P≤0.020%, S≤0.010%, Fe80. 61%, and other unavoidable impurity elements. The preparation method is as follows: firstly, through the processes of intermediate frequency induction furnace, refining outside the furnace, electroslag remelting, and argon blowing casting to obtain alloy ingots with smooth surfaces; then through the processes of heat treatment, forging, hot rolling, annealing, and peeling in sequence, Alloy steel bars or plates. The specific process parameters are: before forging, the mold alloy ingot is heated to 1150°C, forged at 1150°C, the final forging temperature is ≥950°C; the hot rolling temperature is 1150°C, and the final rolling temperature is ≥950°C; using isothermal annealing...

Embodiment 2

[0043] A low-phosphorus-sulfur rare-earth alloy steel for a cold-stamping nut primary forming die and its preparation process, the mass percentage of its composition is: C0.83%, Cr4.25%, Si0.25%, Mn0.27%, W 6.65% %, Mo 5.00%, V 1.85%, Co0.90%, Ni0.18%, Cu0.10%, Nb0.02%, Ce0.013%, P≤0.020%, S≤0.010%, Fe79.657%, and other unavoidable impurity elements. The preparation method is as follows: firstly, through the processes of intermediate frequency induction furnace, refining outside the furnace, electroslag remelting, and argon blowing casting to obtain alloy ingots with smooth surfaces; then through the processes of heat treatment, forging, hot rolling, annealing, and peeling in sequence, Alloy steel bars or plates. The specific process parameters are: before forging, the mold alloy ingot is heated to 1175°C, forged at 1160°C, the final forging temperature is ≥950°C; the hot rolling temperature is 1160°C, and the final rolling temperature is ≥950°C; then isothermal annealing , ...

Embodiment 3

[0046] A low-phosphorus-sulfur rare-earth alloy steel for cold-stamping nut primary forming dies and its preparation process, the mass percentage of its composition is: C0.84%, Cr 4.50%, Si0.3%, Mn0.35%, W 6.80% , Mo 5.2%, V 1.90%, Co 1.00%, Ni0.20%, Cu0.12%, Nb0.03%, Ce0.015%, P≤0.020%, S≤0.010%, Fe78.715%, and others Unavoidable impurity elements. The preparation method is as follows: firstly, through the processes of intermediate frequency induction furnace, refining outside the furnace, electroslag remelting, and argon blowing casting to obtain alloy ingots with smooth surfaces; then through the processes of heat treatment, forging, hot rolling, annealing, and peeling in sequence, Alloy steel bars or plates. The specific process parameters are: before forging, the mold alloy ingot is heated to 1180°C, forged at 1160°C, the final forging temperature is ≥950°C; the hot rolling temperature is 1180°C, and the final rolling temperature is ≥950°C; then isothermal annealing , t...

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Abstract

The invention discloses low-phosphorous-and-sulfur rare earth alloy steel for a cold stamping type nut one-time forming mold and a preparing method thereof. The alloy steel comprises, by mass percent,0.81 to 0.84% of C, 4.00 to 4.50% of Cr, 0.2 to 0.3% of Si, 0.2 to 0.35% of Mn, 6.50 to 6.80% of W, 4.8 to 5.2% of Mo, 1.80 to 1.90% of V, 0.80 to 1.00% of Co, 0.16 to 0.20% of Ni, 0.08 to 0.12% of Cu, 0.01 to 0.03% of Nb, 0.01 to 0.015% of Ce, not larger than 0.020% of P, not larger than 0.010% of S, 78.715 to 80.41% of Fe and other unavoidable impurities. The alloy steel has the excellent comprehensive properties of being low in hardness, high in wear resistance, high in toughness and the like and is low in production cost.

Description

technical field [0001] The invention belongs to the technical field of mold materials, and relates to materials for cold stamping molds, in particular to a cold stamping rare earth alloy mold steel material and a preparation method thereof. Background technique [0002] Mold is an important basic part with the largest amount and wide influence in industrial production, and an indispensable tool in industrial production. Especially with the rapid development of industry, molds have become the main molding tools for industrial products. With the rapid growth of mold demand, the mold manufacturing industry has gradually developed into an independent industry, and its development speed is ahead of other industries, especially the mold steel materials of this invention are all imported in the domestic market. At present, the improvement of the quality of many industrial products, the improvement of production efficiency, the reduction of product cost and the speed of product rep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/52C22C38/48C22C38/46C22C38/44C22C38/42C22C38/04C22C38/02C22C33/04C21D1/26C21D8/00
CPCC21D1/26C21D8/005C22C33/04C22C38/002C22C38/005C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/52
Inventor 唐玉冰唐汝来唐峰唐玉娟
Owner 绍兴蓝之印家纺有限公司
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