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Large-scale mold module and method for manufacturing same

A manufacturing method and mold technology, applied in manufacturing tools, heat treatment process control, heat treatment equipment, etc., can solve problems such as the inability to meet large-scale mold module manufacturing, high module manufacturing costs, and oil mist emission, and improve product competitiveness. And the effect of share, reasonable ratio and investment saving

Active Publication Date: 2010-10-13
宝武特种冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) The ingot cast after electric arc furnace steelmaking is small, only 5-15 tons, so that the unit weight of the module product does not exceed 10.5 tons, which cannot meet the manufacturing of large plastic mold modules exceeding 10.5 tons
[0006] 2) The heat treatment of the module is cooled by a large oil cooling tank, which not only requires investment in a large oil cooling tank device to meet the heat treatment needs of the module, resulting in high manufacturing costs for the module, but also produces a large amount of oil during the cooling process of the heat treatment Fog is scattered in the air, forming environmental pollution

Method used

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  • Large-scale mold module and method for manufacturing same
  • Large-scale mold module and method for manufacturing same
  • Large-scale mold module and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. A large plastic mold module, the weight percent distribution ratio of its chemical composition is: C0.23wt%, Si0.12wt%, Mn1.59wt%, Cr1.30wt%, V0.25wt%, Mo0.63wt%, Ni0 .99wt%, S0.011wt%, P0.013wt%, the rest is Fe;

[0037] 2. After primary smelting in electric arc furnace and scouring outside the furnace, it is cast into a 25-ton large steel ingot; the steel ingot is heated to 1200 °C in the forging heating furnace at a heating rate of 95 °C / h and then kept for 6 hours; the forging temperature is 1110 °C; stop forging The temperature is 950°C.

[0038] After forging, carry out the pre-hardening heat treatment of the plastic mold module. First, put the plastic mold module into the quenching furnace and heat it to 345℃ at a heating rate of 55℃ / h, then keep it for 3.5 hours; then heat it at a heating rate of 55℃ / h to 645℃ Then keep it warm for 3.5 hours; then heat it up to 855°C at a heating rate of 75°C / h and keep it warm for 6.5 hours, then remove it from the quenchin...

Embodiment 2

[0042] 1. A large plastic mold module, the weight percent distribution ratio of its chemical composition is: C0.20wt%, Si0.08wt%, Mn1.55wt%, Cr1.35wt%, V0.12wt%, Mo0.60wt%, Ni0 .90wt%, S0.015wt%, P0.010wt%, the rest is Fe;

[0043] 2. Casting 25 tons of large steel ingots after primary smelting in electric arc furnace and refining outside the furnace; the steel ingots are heated to 1220°C in the forging heating furnace at a heating rate of 80°C / h and then kept for 5 hours; the forging start temperature is 1090°C; the forging stop temperature 900°C.

[0044] After forging, perform pre-hardening heat treatment of the plastic mold module. First, put the plastic mold module into a quenching furnace and heat it to 330℃ at a heating rate of 50℃ / h, then keep it for 3 hours; then heat it at a heating rate of 50℃ / h to 650℃ Then keep it warm for 4 hours; then heat it up to 850°C at a heating rate of 70°C / h and keep it warm for 7 hours, then remove it from the quenching furnace and cool...

Embodiment 3

[0048] 1. A large plastic mold module, the weight percent distribution ratio of its chemical composition is: C0.22wt%, Si0.11wt%, Mn1.70wt%, Cr1.20wt%, V0.35wt%, Mo0.55wt%, Ni1 .20wt%, S0.008wt%, P0.020wt%, the rest is Fe;

[0049] 2. After primary smelting in electric arc furnace and scouring outside the furnace, it is cast into a 25-ton large steel ingot; the steel ingot is heated to 1200 °C in the forging heating furnace at a heating rate of 120 °C / h and then kept for 7 hours; the forging start temperature is 1150 °C; the forging stop temperature 850°C.

[0050] After forging, carry out pre-hardening heat treatment of the plastic mold module. First, put the plastic mold module into the quenching furnace and heat it to 370℃ at a heating rate of 60℃ / h, then keep it for 5 hours; then heat it at a heating rate of 70℃ / h to 630℃ Then keep it warm for 5 hours; then heat it up to 840°C at a heating rate of 80°C / h and keep it warm for 8 hours, then remove it from the quenching furn...

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Abstract

The invention discloses a large mould module and a manufacturing method thereof. The module is characterized by controlling the weight percentages of the chemical components as follows: C, 0.20 to 0.30 wt percent; Si, 0.08 to 0.23 wt percent; Mn, 1.55 to 1.70 wt percent; Cr, 1.20 to 1.35 wt percent; V, 0.12 to 0.35 wt percent; Ni, 0.90 to 1.20 wt percent; Mo, 0.55 to 0.75 wt percent; S, less thanor equal to 0.015 wt percent; P, less than or equal to 0.020 wt percent; the rest, Fe. The manufacturing method includes the following steps: 1) casting of ingots; 2) forging; 3) pre-hardening and heat treatment; 4) moving the ingots out of a quenching furnace in the air and cooling to room temperature by wind cooling; 5) after cooling, heat preservation in a tempering furnace, moving out from the tempering furnace and cooling to room temperature in the air. The method saves energy, reduces manufacturing cost and comprehensively improves every performance index of the large mould module at the same time.

Description

technical field [0001] The invention relates to a plastic mold module and a metallurgical manufacturing method thereof, in particular to a large plastic mold module used in the plastic mold manufacturing industry and a metallurgical manufacturing method thereof. Background technique [0002] Die steel modules can be generally divided into thermal mold modules and plastic mold modules according to their uses. These two mold steel modules have different uses. The thermal mold module is used to manufacture metal forming molds, and the plastic mold module is used to manufacture plastic molding. Molds and plastic mold modules are the most widely used metallurgical products in the mold industry today. The plastic mold modules currently used in my country are made of T22020 materials in the national standard GB / T1299-2002. The chemical composition ratio, manufacturing process and performance indicators of metallurgical products involved in the manufacturing method are as follows: ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C33/04C21D8/00C21D11/00B21J1/06
Inventor 续维吴振毅
Owner 宝武特种冶金有限公司
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