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Non-fuel medium quenching process for casting grinding ball and casting grinding section

A technology of casting grinding balls and medium quenching, which is applied in the field of quenching technology, can solve the problems of quenching agent aging and deterioration, production environment pollution, etc., and achieve the effects of reducing process costs, cleaning the production environment, and reducing costs

Inactive Publication Date: 2011-08-03
ANHUI FENGXING WEAR RESISTANT MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned problems that the quenching agent in oil medium quenching is prone to aging and deterioration, and the production environment is seriously polluted during the operation process, the present invention provides a non-oil medium quenching process for casting grinding balls and grinding segments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Non-oil medium quenching process for ?15 casting grinding balls and grinding segments

[0024] ?15 The element composition of cast grinding balls and grinding segments is:

[0025] Carbon (C): 2.63 % Silicon (Si): 0.58 %, Manganese (Mn): 0.38 %,

[0026] Chromium (Cr): 4.32%, Phosphorus (P): 0.064%, Sulfur (S): 0.055%;

[0027] Niobium (Nb): 0.055%, Boron (B): 0.12%, Compound Rare Earth Modifier (Re): 0.18%,

[0028] Iron (Fe): 91.39%.

[0029] A. Prepare a water-soluble quenching solution with a concentration of 15-25% in the quenching pool, and the temperature of the water-soluble quenching solution is controlled between 10-90°C; the water-soluble quenching solution is an aqueous solution of vinyl polymer (trade name for PQG and PQL).

[0030] B. Put ?15 cast grinding balls and grinding segments in the quenching basket and put them into the heating furnace to heat to the quenching temperature of 930-1050°C. After being released from the furnace, pour them into the...

Embodiment 2

[0035] Non-oil medium quenching process for ?35 casting grinding balls and grinding segments

[0036] The chemical composition of ?35 cast grinding balls and grinding segments is as follows:

[0037] Carbon (C): 1.81%, Silicon (Si): 0.62%, Manganese (Mn): 0.65%,

[0038] Chromium (Cr): 6.32%, Phosphorus (P): 0.059%, Sulfur (S): 0.058%;

[0039] Niobium (Nb): 0.058%, Boron (B): 0.11%, Compound Rare Earth Modifier (Re): 0.2%,

[0040] Iron (Fe): 90.12%.

[0041] A. Prepare a water-soluble quenching solution with a concentration of 18-23% in the quenching pool, and the temperature of the water-soluble quenching solution is 10-90°C.

[0042] B. Put ?35 cast grinding balls and grinding segments in the quenching basket and put them into the heating furnace to heat to the quenching temperature of 950-1100°C. After being released from the furnace, pour them into the movable quenching cradle and spread them evenly.

[0043] C. Submerge the active quenching cradle in the water-solub...

Embodiment 3

[0046] The non-oil medium quenching process of ?100 cast grinding balls includes the following steps:

[0047] The chemical composition of ?100 cast grinding balls is as follows:

[0048] Carbon (C): 1.52%, Silicon (Si): 0.68%, Manganese (Mn): 0.72%,

[0049]Chromium (Cr): 7.1%, Phosphorus (P): 0.058%, Sulfur (S): 0.055%;

[0050] Niobium (Nb): 0.060%, Boron (B): 0.13%, Compound Rare Earth Modifier (Re): 0.25%,

[0051] Iron (Fe): 89.43%.

[0052] A. Prepare a water-soluble quenching solution with a concentration of 10-20% in the quenching pool, and the temperature of the water-soluble quenching solution is 10-90°C.

[0053] B. Put ?100 cast grinding balls in a quenching basket and put them into a heating furnace to heat to a quenching temperature of 980-1150°C. After being released from the furnace, pour them into a movable quenching cradle and spread them evenly.

[0054] C. Submerge the active quenching cradle in the water-soluble quenching liquid of the quenching pool ...

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Abstract

The invention relates to a non-fuel medium quenching process for a casting grinding ball and a casting grinding section, comprising the following operation steps of: firstly, preparing water-soluble quenching liquid with concentration of 10-25 percent, wherein the temperature of the quenching liquid is controlled to be 10-90DEG C; secondly, feeding the casting grinding ball and the casting grinding section in a quenching basket and then in a heating furnace, heating until the quenching temperature is 930-1,150DEG C, discharging from the furnace and uniformly spreading in a movable quenching cradle; thirdly, immersing the movable quenching cradle in the water-soluble quenching liquid of a quenching pond and quenching for 5-10 minutes; and fourthly, when the surface temperature of the casting grinding ball and the casting grinding section is reduced to be 250-350DEG C, finishing quenching operation. By using the process disclosed by the invention, various technical indexes of the casting grinding ball and the casting grinding section are respectively higher than those of current national standard and industrial standard. The quenching hardness is stabilized between 62 and 66HRc (Rockwell hardness) and the difference between the center and the surface hardness is smaller than 1.5HRc. The grinding ball and the grinding section treated by adopting the process disclosed by the invention not only have stable quality and remarkably-reduced cost. Meanwhile, the potential safety hazard of production fields and the pollution to the environment are avoided.

Description

technical field [0001] The invention belongs to the technical field of heat treatment of mechanical products, and in particular relates to a quenching process for casting grinding balls and casting grinding segments of wear-resistant medium materials. Background technique [0002] Casting grinding balls and casting grinding segments are consumable grinding media widely used in powder engineering in building materials, mining, chemical industry, thermal power and other industries, and are mass-produced by casting. In order to make cast grinding balls and cast grinding segments have excellent comprehensive mechanical properties such as hardness, toughness, wear resistance, and corrosion resistance, choosing a suitable heat treatment method is a key process for quality control. [0003] At present, most of the chromium alloy casting grinding balls and grinding segments in the wear-resistant material industry at home and abroad use air-cooling quenching (also known as air quench...

Claims

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Application Information

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IPC IPC(8): C21D1/60
Inventor 陈宗明陈晓沈茂林汪国清
Owner ANHUI FENGXING WEAR RESISTANT MATERIALS CO LTD
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