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Highly polished pre-hardening plastic die steel and manufacturing process thereof

A technology of plastic mold and manufacturing process, applied in the field of high-polishing pre-hardened plastic mold steel and its manufacturing process, can solve the problems of increasing the manufacturing cost and high price of automobile products, and achieve the improvement of manufacturing level and market competitiveness, low alloy cost, The effect of high polishing performance

Inactive Publication Date: 2016-01-27
RUGAO HONGMAO HEAVY FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the price of NAK80 steel or 1.2343 steel is higher, which will greatly increase the manufacturing cost of these automotive products

Method used

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  • Highly polished pre-hardening plastic die steel and manufacturing process thereof
  • Highly polished pre-hardening plastic die steel and manufacturing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A highly polished pre-hardened plastic mold steel matrix is ​​composed of the following components in mass percentage: C0.20%; Si0.10%; Mn0.80%; Cr0.80%; W0.60%; Mo0.50%; V0.07%; P0.015%; S0.002%; B0.003%;

[0042] Ni1.00%; Nb0.06%; the rest is Fe.

[0043] A manufacturing process of highly polished pre-hardened plastic mold steel has the following steps:

[0044] Step A. electric furnace smelting: smelting in an electric arc furnace according to the composition of the above components, then refining outside the furnace and vacuum degassing, casting into steel ingots and sending them to the forging heating furnace;

[0045] Step B. High-temperature diffusion heat treatment: heat the steel ingot treated in step A at high temperature, keep the temperature at 1150-1250°C, and keep it warm for 15-20 hours;

[0046] Step C. Forging hot processing: cooling the steel ingot treated in step B to a temperature range of 900~1200°C for multi-directional forging processing, adopti...

Embodiment 2

[0052] A highly polished pre-hardened plastic mold steel matrix is ​​composed of the following components in mass percentage: C0.20%; Si0.20%; Mn1.00%; Cr0.70%; W0.50%; Mo0.70%; V0.06%; P0.010%; S0.002%; B0.005%; Ni0.80%; Nb0.06%; the rest is Fe.

[0053] A manufacturing process of highly polished pre-hardened plastic mold steel has the following steps:

[0054] Step A. electric furnace smelting: smelting in an electric arc furnace according to the composition of the above components, then refining outside the furnace and vacuum degassing, casting into steel ingots and sending them to the forging heating furnace;

[0055] Step B. High-temperature diffusion heat treatment: heat the steel ingot treated in step A at high temperature, keep the temperature at 1150-1250°C, and keep it warm for 15-20 hours;

[0056] Step C. Forging hot processing: cooling the steel ingot treated in step B to a temperature range of 900~1200°C for multi-directional forging processing, adopting two ups...

Embodiment 3

[0062] A highly polished pre-hardened plastic mold steel matrix is ​​composed of the following components in mass percentage: C0.18%; Si0.18%; Mn1.00%; Cr1.00%; W0.80%; Mo0.50%; V0.05%; P0.020%; S0.003%; B0.004%; Ni1.00%; Nb0.10%; the rest is Fe.

[0063] A manufacturing process of highly polished pre-hardened plastic mold steel has the following steps:

[0064] Step A. electric furnace smelting: smelting in an electric arc furnace according to the composition of the above components, then refining outside the furnace and vacuum degassing, casting into steel ingots and sending them to the forging heating furnace;

[0065] Step B. High-temperature diffusion heat treatment: heat the steel ingot treated in step A at high temperature, keep the temperature at 1150-1250°C, and keep it warm for 15-20 hours;

[0066] Step C. Forging hot processing: cooling the steel ingot treated in step B to a temperature range of 900~1200°C for multi-directional forging processing, adopting two ups...

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Abstract

The invention relates to highly polished pre-hardening plastic die steel and a manufacturing process thereof and belongs to the technical field of alloy steel manufacturing processes. A base body of the highly polished pre-hardening plastic die steel is composed of, by mass, 0.10-0.30% of C, 0.00-0.30% of Si, 0.50-1.50% of Mn, 0.50-1.00% of Cr, 0.20-1.00% of W, 0.40-1.00% of Mo, 0.00-0.10% of V, 0.00-0.025% of P, 0.00-0.005% of S, 0.002-0.005% of B, 0.60-1.50% of Ni, 0.00-0.15% of Nb and the balance Fe. The manufacturing process of the die steel comprises the steps of burdening, smelting, casting, hot charging, high temperature heat diffusion heat treatment, multidirectional forging heat machining, post-forging fine crystalline normalizing and dehydrogenation annealing processing, and final quenching and tempering heat treatment to obtain a tempered martensite structure with the hardness of 38-42 HRC. The die steel has low cost, high hardenability, high hardness, high polishing performance and leather pattern etching performance.

Description

technical field [0001] The invention relates to a mold steel and its manufacturing process, in particular to a highly polished pre-hardened plastic mold steel and its manufacturing process. The mold steel makes full use of the alloying characteristics of Cr-Mo-W-V-Ni multi-alloy elements to ensure Steel has high hardness uniformity and polishing performance, which is suitable for the manufacture of plastic molds with extremely high surface requirements, such as automobile lights, rearview mirrors, lamps, interior parts, TV casings, mobile phone communications and other electrical devices. It belongs to alloy steel technology field. Background technique [0002] With the rapid development of my country's manufacturing industry, more and more molds are used, and the performance requirements for mold materials are also getting higher and higher. Molds are used in the production of automobile manufacturing, home appliances, electronic communications, etc. These molds require h...

Claims

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Application Information

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IPC IPC(8): C22C38/54C21D6/00C21D8/00
Inventor 周青春徐卫明顾金才葛建辉钱强赵博伟丁勇王小飞任志强
Owner RUGAO HONGMAO HEAVY FORGING
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