Molten forging steel used for manufacturing eccentric shaft of crusher and smelting method for molten forging steel

A technology of eccentric shaft and forging steel, which is applied in the field of forging steel for manufacturing eccentric shafts of crushers and its smelting field, to achieve good impact toughness and wear resistance, long-term safe and efficient operation, and high strength and hardness.

Active Publication Date: 2016-04-27
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no research report on the smelting method of forging steel molten steel used to manufacture the eccentric shaft of the crusher in domestic patent and paper retrieval

Method used

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  • Molten forging steel used for manufacturing eccentric shaft of crusher and smelting method for molten forging steel
  • Molten forging steel used for manufacturing eccentric shaft of crusher and smelting method for molten forging steel
  • Molten forging steel used for manufacturing eccentric shaft of crusher and smelting method for molten forging steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A, hot metal pretreatment desulfurization: blast furnace hot metal (chemical composition C4.2wt%, Si0.40wt%, Mn0.30wt%, P0.105wt%, S0.018wt%, the rest is Fe and unavoidable impurities) transport To the KR method molten iron pretreatment device for desulfurization treatment, the insertion depth of the stirring head is controlled at 2400-2600mm, according to 11.0kg / t 钢 Add the conventional CaO-based desulfurizer for desulfurization treatment, and control the stirring time to 6 minutes; after the stirring, carry out the slag removal operation to ensure that the molten iron surface in the ladle is exposed ≥ 4 / 5, and remove the desulfurization slag; the molten iron composition after pretreatment The control is: C4.2wt%, Si0.40wt%, Mn0.30wt%, P0.105wt%, S0.003wt%, the rest is Fe and unavoidable impurities.

[0041] B, molten steel smelting: the pretreatment deep desulfurization hot metal of step A (chemical composition C4.2wt%, Si0.40wt%, Mn0.30wt%, P0.105wt%, S0.003wt%, the ...

Embodiment 2

[0051] A, hot metal pretreatment desulfurization: blast furnace hot metal (chemical composition C4.5wt%, Si0.50wt%, Mn0.47wt%, P0.118wt%, S0.022wt%, the rest is Fe and unavoidable impurities) transport To the KR method molten iron pretreatment device for desulfurization treatment, the insertion depth of the stirring head is controlled at 2400-2600mm, according to 12.0kg / t 钢 Add the conventional CaO-based desulfurizer for desulfurization treatment, and control the stirring time to 6 minutes; after the stirring, carry out the slag removal operation to ensure that the molten iron surface in the ladle is exposed ≥ 4 / 5, and remove the desulfurization slag; the molten iron composition after pretreatment The control is: C4.5wt%, Si0.50wt%, Mn0.47wt%, P0.118wt%, S0.004wt%, the rest is Fe and unavoidable impurities.

[0052] B, molten steel smelting: the pretreatment deep desulfurization hot metal of step A (chemical composition C4.5wt%, Si0.50wt%, Mn0.47wt%, P0.118wt%, S0.004wt%, the ...

Embodiment 3

[0062] A, hot metal pretreatment desulfurization: blast furnace hot metal (chemical composition C4.8wt%, Si0.60wt%, Mn0.60wt%, P0.130wt%, S0.025wt%, the rest is Fe and unavoidable impurities) transport To the KR method molten iron pretreatment device for desulfurization treatment, the insertion depth of the stirring head is controlled at 2400-2600mm, according to 13.0kg / t 钢 Add the conventional CaO-based desulfurizer for desulfurization treatment, and control the stirring time to 6 minutes; after the stirring, carry out the slag removal operation to ensure that the molten iron surface in the ladle is exposed ≥ 4 / 5, and remove the desulfurization slag; the molten iron composition after pretreatment The control is: C4.8wt%, Si0.60wt%, Mn0.60wt%, P0.130wt%, S0.005wt%, the rest is Fe and unavoidable impurities.

[0063] B, molten steel smelting: the pretreatment deep desulfurization hot metal of step A (chemical composition C4.8wt%, Si0.60wt%, Mn0.60wt%, P0.130wt%, S0.005wt%, the ...

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Abstract

The invention discloses molten forging steel used for manufacturing an eccentric shaft of a crusher and a smelting method for the molten forging steel. The molten forging steel used for manufacturing the eccentric shaft of the crusher comprises the following chemical components in percentage by weight: 0.40-0.47wt% of C, 0.25-0.35wt% of Si, 0.70-0.90wt% of Mn, 0.015-0.025wt% of Nb, 1.00-1.20wt% of Cr, 0.20-0.30wt% of Mo, less than or equal to 0.005wt% of S, less than or equal to 0.020wt% of P, less than or equal to 0.0008wt% of O, less than or equal to 0.0001wt% of H, and the balance of Fe and inevitable impurities. The preparation method comprises the following steps: pre-treating and deeply desulfurizing molten iron by a KR process, carrying out LD converter smelting, carrying out LF steel ladle furnace smelting, carrying out VD furnace vacuum refining, and the like. The molten steel provided by the invention has high cleanliness and low impurity content; and the eccentric shaft forging steel produced by the molten steel has high strength, good toughness and good wear and corrosion resistance, and is not liable to deform and crack for a long time in work, so that long-time safe and efficient operation of the crusher is ensured.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to molten steel for forgings used for manufacturing eccentric shafts of crushers and a smelting method thereof. Background technique [0002] The eccentric shaft is usually used as the main shaft of the crusher. One end is equipped with a pulley and the other end is equipped with a flywheel. Its main structural feature is that the two axes are parallel and do not overlap, which greatly simplifies the eccentric mechanism. When the crusher is working, under the action of the rotation of the eccentric shaft, the connecting rod reciprocates up and down, driving the two thrust plates to reciprocate, thereby pushing the jaws to reciprocate left and right to achieve crushing and unloading. When the crusher is in operation, the eccentric bearing is subjected to huge bending torque. In order to ensure safe, stable and efficient operation, the material used to manufacture eccent...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/12C22C38/18C21C1/02C21C7/06C21C7/10C21C7/072
CPCC21C1/02C21C7/06C21C7/072C21C7/10C22C38/02C22C38/04C22C38/12C22C38/18
Inventor 陈伟张卫强陆大章岳伟李金柱文玉兵朱锡森杨春雷张瑜王卫东苏灿东
Owner WUKUN STEEL
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