Liquid extrusion forming method of steel ball

An extruded and liquid technology, applied in the field of wear-resistant steel balls, can solve problems such as poor quality, non-wear resistance, and waste of production materials, and achieve the effects of increasing service life, improving mechanical properties, and improving production efficiency

Inactive Publication Date: 2019-08-20
陈铁石
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) There are many processes, low production efficiency and waste of production materials
[0005] 2) The utilization rate of molten steel is low, its utilization rate is only 75%
[0006] 3) Sand falling and uneven hardness lead to a 100% out-of-round rate of steel balls, which are not smooth and clean, and the comprehensive mechanical properties decrease, resulting in broken steel balls, non-wear resistance, poor quality and high cost.

Method used

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  • Liquid extrusion forming method of steel ball
  • Liquid extrusion forming method of steel ball
  • Liquid extrusion forming method of steel ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment one: make 6mn5si4cr5 wear-resistant steel ball.

[0031] The steps of the steel ball liquid extrusion forming method described in this embodiment are: smelting→liquid extrusion→waste heat treatment.

[0032] 1. The smelting process is as follows: the steel is smelted according to the chemical composition ratio of 6mn5si4cr5, and the molten steel is put into the heat preservation bag to be poured after the pre-furnace inspection and testing, and the composition is qualified.

[0033] 2. Liquid extrusion:

[0034] (1) Liquid extrusion die: see Figure 1-2 , 5, upper and lower molds 6, 2 are provided, and the upper and lower mold sides are provided with connecting locks: namely, the locking hook 3 is connected through the shaft 2-1 at the lower mold side, and the locking pin 6- is connected at the upper mold side. 1. When the upper and lower molds are closed, the lock hook 3 is hooked on the lock pin 6-1 to prevent movement between the upper and lower molds. ...

Embodiment 2

[0043] Embodiment two: making high chromium alloy wear-resistant steel balls.

[0044] The steps of the steel ball liquid extrusion forming method described in this embodiment are the same as those in Embodiment 1:

[0045] 1. Melting process: Melting the steel according to the chemical composition ratio of high chromium alloy. After inspection and testing before the furnace, after adjusting the composition, the molten steel is put into the heat preservation bag to be poured.

[0046] 2. Liquid extrusion:

[0047] (1) Liquid extrusion die: see Figure 3-4 , 5. The mold is provided with upper and lower molds, and the sides of the upper and lower molds are provided with connecting locks: that is, the locking hook 3 is connected through the shaft 2-1 at the side of the lower mold, and the locking pin 6-1 is connected at the side of the upper mold. When the upper and lower dies are closed, the lock hook 3 is hooked on the lock pin 6-1 to prevent movement between the upper and lo...

Embodiment 3

[0052] Embodiment three: making low-chromium alloy wear-resistant steel balls.

[0053] The steps of the steel ball liquid extrusion forming method described in this embodiment are the same as those in Embodiment 1.

[0054] 1. Melting process: Melting the steel according to the chemical composition ratio of the low chromium alloy. After the inspection and testing before the furnace, the composition is adjusted and the molten steel is put into the heat preservation bag to be poured.

[0055] 2. Liquid extrusion:

[0056] (1) Liquid extrusion die: see Figure 1-2 , The mold is provided with upper and lower molds 6, 2, and the sides of the upper and lower molds are provided with connecting locks (same as Example 1). Four sets of opposite hemispherical inner cavities 4, 1 are respectively arranged on the opposite surfaces of the upper and lower molds, and the upper and lower opposite hemispherical inner cavities form a spherical liquid extrusion cavity; the hemispherical inner ca...

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Abstract

The invention discloses a liquid extrusion forming method for liquid extrusion of a steel ball. The forming method comprises the following steps of smelting, liquid die forging and heat treatment, wherein liquid extrusion comprises the following steps that after a liquid extrusion die is fixed to an indirect extrusion casting machine, a smelted steel ball solution is quantitatively poured into theliquid extrusion die, the casting temperature is 1500-1600 DEG C, the pressurization speed is 20-50 mm / s, the filling time is 1-8 s, the specific pressure is 150-250 mpa, and the pressure is maintained for 10-40 seconds under the pressure to obtain the near-final steel ball; and the residual-temperature quenching and low-temperature tempering of the liquid-state extruded near-end steel ball are utilized. According to the liquid-state extruded steel ball, the cost is reduced, and the production efficiency is improved; and meanwhile the microstructure state of the steel ball can be effectivelyensured, and the comprehensive mechanical property is improved.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant steel balls, and in particular relates to a liquid extrusion forming method of steel balls. Background technique [0002] Steel balls are widely used in mineral processing plants, building materials cement plants, thermal power plants, refractory material plants and other fields. The traditional preparation process is to pour molten steel into the sand mold riser and enter the cavity. [0003] There are following problems in existing technology: [0004] 1) There are many processes, low production efficiency and waste of production materials. [0005] 2) The utilization rate of molten steel is low, and its utilization rate is only 75%. [0006] 3) Sand falling and uneven hardness lead to 100% out-of-round rate of steel balls, which are not smooth and clean, and the comprehensive mechanical properties decrease, resulting in many defects such as broken steel balls, non-wear resistance, poo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/02C21D1/18C21D9/36
CPCB22D18/02C21D1/18C21D9/36Y02P10/20
Inventor 陈铁石
Owner 陈铁石
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