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Method for manufacturing wheel mold

A manufacturing method and wheel technology, which is applied in the field of wheel molds, can solve problems such as poor mold hardness, improper structure control, and insufficient wheel precision, and achieve ideal anti-oxidation, ensure machinability, and refine austenite grains.

Inactive Publication Date: 2016-03-30
SHANDONG HEZE ZHENHUA PRECISION MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after surface treatment, such as flame quenching, of wheel molds cast from this type of alloy cast iron, the phenomenon of insufficient precision or dimensional deviation of the stamped wheels often occurs during production and use.
The main reason for these situations is that the composition of the mold material and improper control of the structure cause poor final quenching of the mold and insufficient hardness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for manufacturing a wheel mold, the chemical composition and mass percentage of the wheel mold material are: 3.5% carbon, 1.9% silicon, 1% nickel, <0.8% copper, 0.5% manganese, 0.35% molybdenum, 0.35% chromium, <0.06% titanium, <0.06% zirconium, <0.01% sulfur, <0.01% phosphorus, <0.01% rhenium, <0.01% scandium, and the rest is iron;

[0028] Described preparation method comprises the following steps:

[0029] Step (1): Dosing according to the chemical composition of the materials designed above, the raw materials are pig iron, ferrosilicon, electrolytic nickel, electrolytic copper, ferromanganese, ferromolybdenum, ferrochromium, micron titanium oxide, nano zirconium carbide, rhenium oxide and scandium oxide ;

[0030] Step (2): Melting all raw materials in an intermediate frequency induction furnace at a melting temperature of 1480°C to obtain castings;

[0031] Step (3): Surface heat treatment is carried out on the prepared casting at a heating temperature o...

Embodiment 2

[0034] A method for manufacturing a wheel mold, the chemical composition and mass percentage of the wheel mold material are: 3.65% carbon, 1.95% silicon, 1.2% nickel, <9% copper, 0.6% manganese, 0.4% molybdenum, 0.4% chromium, <0.07% titanium, <0.07% zirconium, <0.015% sulfur, <0.015% phosphorus, <0.015% rhenium, <0.015% scandium, and the rest is iron;

[0035] Described preparation method comprises the following steps:

[0036] Step (1): Dosing according to the chemical composition of the materials designed above, the raw materials are pig iron, ferrosilicon, electrolytic nickel, electrolytic copper, ferromanganese, ferromolybdenum, ferrochromium, micron titanium oxide, nano zirconium carbide, rhenium oxide and scandium oxide ;

[0037] Step (2): Melting all raw materials in an intermediate frequency induction furnace at a melting temperature of 1520°C to obtain castings;

[0038] Step (3): Surface heat treatment is carried out on the prepared casting at a heating temperatu...

Embodiment 3

[0041] A method for manufacturing a wheel mold, the chemical composition and mass percentage of the wheel mold material are: 3.8% carbon, 2.0% silicon, 1.3% nickel, <1% copper, 0.7% manganese, 0.5% molybdenum, 0.5% chromium, <0.08% titanium, <0.08% zirconium, <0.02% sulfur, <0.02% phosphorus, <0.02% rhenium, <0.02% scandium, and the rest is iron;

[0042] Described preparation method comprises the following steps:

[0043] Step (1): Dosing according to the chemical composition of the materials designed above, the raw materials are pig iron, ferrosilicon, electrolytic nickel, electrolytic copper, ferromanganese, ferromolybdenum, ferrochromium, micron titanium oxide, nano zirconium carbide, rhenium oxide and scandium oxide ;

[0044] Step (2): Melting all raw materials in an intermediate frequency induction furnace at a melting temperature of 1560°C to obtain castings;

[0045] Step (3): Surface heat treatment is carried out on the prepared casting at a heating temperature of ...

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Abstract

The invention discloses a method for manufacturing a wheel mold; a wheel mold material has the chemical composition by the mass percentage: 3.5-3.8% of carbon, 1.9-2.0% of silicon, 1-1.3% of nickel, less than 1% of copper, 0.5-0.7% of manganese, 0.35-0.5% of molybdenum, 0.35-0.5% of chromium, less than 0.08% of titanium, less than 0.08% of zirconium, less than 0.02% of sulfur, less than 0.02% of phosphorus, less than 0.02% of rhenium, less than 0.02% of scandium, and the balance iron. Micro titanium oxide and nano zirconium carbide are used as reinforcement phases, and micro-nano compositing is realized, so the strength, toughness and hardness of the material can be improved at the same time, and the mechanical properties and the use performance of the material are significantly improved; with composite addition of rhenium oxide and scandium oxide, the material has rather high aging resistance and defect resistant ability, the grain phase transformation critical size is relatively large, and requirements on the fineness of raw materials are relatively low, so that the material has better comprehensive performance. The wheel mold has ideal oxidation resistance, refined austenite grains, heat radiation and fatigue resistance through reasonable selection of the chemical elements and amount.

Description

technical field [0001] The invention relates to the field of wheel molds, in particular to a method for manufacturing a wheel mold. Background technique [0002] The wheel is a die-casting part, and the low-pressure casting mold is used, and the mold material plays an important role in the wheel. At present, molds are made at room temperature. During normal production, the mold temperature is about 400 degrees Celsius, which will cause thermal deformation. According to actual statistics, the average variation of thermal deformation on the end face of the wheel lip is about 0.4mm. After analysis, the mold material has a great influence on thermal deformation. The offset distance of the hub refers to the distance from the inner surface of the mounting hole of the hub to the centerline of the hub. [0003] In addition, during the working process, the wheel mold is usually cast from alloy cast iron due to its large size and complex shape. Among them, Cr-Mo cast iron is widely...

Claims

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Application Information

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IPC IPC(8): C22C37/10C21D6/00C21D1/06B22D18/04
Inventor 冯勋震
Owner SHANDONG HEZE ZHENHUA PRECISION MOLD
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