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Manufacturing method for high-carbon-chromium-iron balls

A manufacturing method, high-carbon ferrochromium technology, applied in the field of metallurgy, can solve the problems of complex production process, poor mechanical properties, short service life, etc., and achieve the effect of good wear resistance, improved mechanical properties, and simple manufacturing method

Inactive Publication Date: 2018-09-28
龚晓俅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the production process for the ball is complicated, the wear resistance is not good, the mechanical performance is poor, and the service life is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The invention provides a method for manufacturing high-carbon ferrochrome balls. The manufacturing method includes the following steps: S1. Smelting: batching according to the chemical components of the balls, and then smelting in an induction furnace at a smelting temperature of 1350°C; Before adding inoculants and nodulizers to the molten iron, the inoculants are ferrosilicon and silicon-barium alloys, the inoculants account for 0.3% by mass of the molten iron, the nodulizers are rare earth magnesium alloys, and the nodulizers account for the mass percent of the molten iron 1.3%; S2, casting: pouring molten iron into the mould, the pouring temperature of molten iron is 1250 ℃, obtains the ball casting; S3, unboxing and sand cleaning: the casting is taken out after slow cooling in the combined sand box for 60 hours, and cleaned Molding sand attached to the surface; S4. Heat treatment: Carry out two-stage annealing treatment on the casting, wherein the heating temperatur...

Embodiment 2

[0013] The invention provides a method for manufacturing high-carbon ferrochrome balls. The manufacturing method includes the following steps: S1. Smelting: batching according to the chemical components of the balls, and then smelting in an induction furnace at a smelting temperature of 1500°C; Before adding inoculants and nodulizers to the molten iron, the inoculants are ferrosilicon and silicon-barium alloys, the inoculants account for 0.6% by mass of the molten iron, the nodulizers are rare earth magnesium alloys, and the nodulizers account for the mass percent of the molten iron 1.5%; S2, casting: the molten iron is poured into the mould, and the pouring temperature of the molten iron is 1400 ℃, and the ball casting is obtained; S3, unboxing and sand cleaning: the casting is taken out after being slowly cooled in the combined sand box for 80 hours, and cleaned Molding sand attached to the surface; S4. Heat treatment: Carry out two-stage annealing treatment on the casting, w...

Embodiment 3

[0015] The invention provides a method for manufacturing high-carbon ferrochrome balls. The manufacturing method includes the following steps: S1, smelting: batching according to the chemical components of the balls, and then smelting in an induction furnace at a smelting temperature of 1450°C; out of the furnace Before adding inoculants and nodulizers to the molten iron, the inoculants are ferrosilicon and silicon-barium alloys, the inoculants account for 0.5% of the mass percentage of the molten iron, and the nodulizers are rare earth magnesium alloys, and the nodulizers account for the mass percentage of the molten iron 1.4%; S2, casting: the molten iron is poured into the mould, and the pouring temperature of the molten iron is 1325° C. to obtain ball castings; S3, unboxing and sand cleaning: the casting is taken out after being slowly cooled in the combined sand box for 60-80 hours, And clean up the molding sand attached to the surface; S4, heat treatment: perform two-stag...

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PUM

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Abstract

The invention discloses a manufacturing method for high-carbon-chromium-iron balls. The manufacturing method for the high-carbon-chromium-iron balls is characterized by comprising the following steps:S1, smelting: blending according to chemical components of the balls, and then smelting the chemical components in an induction furnace at the smelting temperature being 1350-1500 DEG C; and adding anucleating agent and a spheroidizing agent in molten iron before the molten iron is discharged from the furnace; S2, casting: pouring the molten iron in a die to obtain a ball cast product, wherein the pouring temperature of the molten iron is 1250-1400 DEG C; S3, box opening for sand cleaning: taking out the cast product after slowly cooling the cast product in a merged sand box, and cleaning moulding sand attached to the surface of the cast product; and S4, heat treatment: carrying out two-stage type annealing treatment on the cast product and then cooling the cast product in the furnace. The manufacturing method for the high-carbon-chromium-iron balls is simple, the mechanical property of the ball can be improved, the wear resistance is good, and the service lives of the balls are prolonged.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for manufacturing high-carbon ferrochrome balls. Background technique [0002] Ferrochromium can be used as steelmaking additives to produce a variety of special steels, such as stainless steel, spring steel, tool steel, etc. These special steels and special alloys are widely used in the fields of aviation, aerospace, automobiles, shipbuilding and national defense industries. In the prior art, the production process for the ball is complicated, the wear resistance is poor, the mechanical performance is poor, and the service life is short. Contents of the invention [0003] Aiming at the above-mentioned problems in the prior art, the present invention provides a method for manufacturing high-carbon ferrochrome balls. The method for manufacturing high-carbon ferrochrome balls is simple, can improve the mechanical properties of the balls, has good wear resistance, and ...

Claims

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Application Information

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IPC IPC(8): C21C1/10C22C33/10C21D9/36
CPCC21C1/105C21D1/26C21D9/36C22C33/10
Inventor 龚晓俅
Owner 龚晓俅