Large-scale mold module and method for manufacturing same

A manufacturing method and mold technology, applied in the direction of manufacturing tools, heat treatment process control, heat treatment equipment, etc., can solve the problems of not being able to meet the requirements of large-scale plastic mold module manufacturing, high module manufacturing costs, and oil mist emission, so as to improve product competitiveness And the effect of occupying share, reasonable ratio and saving investment

Active Publication Date: 2008-11-26
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-scale plastic mold module, the weight percentage of its chemical composition is: C 0.23wt%, Si0.12wt%, Mn 1.59wt%, Cr 1.30wt%, V 0.25wt%, Mo 0.63wt%, Ni 0.99wt%, S 0.011wt%, P 0.013wt%, the rest is Fe;

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

[0038] After forging, the pre-hardening heat treatment of the plastic mold module is carried out. First, the plastic mold module is placed in a quenching furnace and heated to 345°C at a heating rate of 55°C / h, then kept for 3.5 hours; then heated to 645°C at a heating rate of 55°C / h After holding for 3.5 hours; then heating to 855°C at a heating rate of 75°C / h and holding for 6.5 hours, then remove the quenching furnace and cool to room tem...

Embodiment 2

[0042] 1. A large-scale plastic mold module, the weight percentage of its chemical composition is: C 0.20wt%, Si0.08wt%, Mn 1.55wt%, Cr 1.35wt%, V 0.12wt%, Mo 0.60wt%, Ni 0.90wt%, S 0.015wt%, P 0.010wt%, the rest is Fe;

[0043] 2. After initial smelting and refining outside of the electric arc furnace, it is cast into a large steel ingot of 25 tons; the steel ingot is heated in the forging heating furnace at a heating rate of 80℃ / h to 1220℃ and then kept for 5 hours; the forging temperature is 1090℃; the forging temperature is stopped 900°C.

[0044] After forging, the pre-hardening heat treatment of the mold module is carried out. First, the mold module is placed in a quenching furnace and heated to 330°C at a heating rate of 50°C / h, and then kept for 3 hours; then heated to 650°C at a heating rate of 50°C / h After keeping the temperature for 4 hours; then heating to 850°C according to the heating rate of 70°C / h, then keeping it for 7 hours, then remove the quenching furnace and ...

Embodiment 3

[0048] 1. A large-scale plastic mold module, the weight percentage of its chemical composition is: C 0.22wt%, Si0.11wt%, Mn 1.70wt%, Cr 1.20wt%, V 0.35wt%, Mo 0.55wt%, Ni 1.20wt%, S 0.008wt%, P 0.020wt%, the rest is Fe;

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

[0050] After forging, the pre-hardening heat treatment of the plastic mold module is performed. First, the plastic mold module is placed in a quenching furnace and heated to 370°C at a heating rate of 60°C / h, and then kept for 5 hours; then heated to 630°C at a heating rate of 70°C / h After keeping the temperature for 5 hours; then heating to 840°C according to the temperature increase rate of 80°C / h, then keeping it for 8 hours...

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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 than or 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 are generally divided into hot mold modules and plastic mold modules according to their uses. These two mold steel modules have different uses. The hot mold module is used to make metal forming molds, and the plastic mold module is used to make plastic molding. Molds and plastic mold modules are one of the most used metallurgical products in the mold industry today. The plastic module currently used in my country is made of T22020 material in the national standard GB / T1299-2002. The chemical composition ratio, manufacturing process and metallurgical product performance indicators involved in the manufacturing method are as follows: [0003] The ratio of chemical composition:...

Claims

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Application Information

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Patent Type & Authority Applications(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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