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A kind of steel ingot pouring mold and pouring method

A technology of steel ingot casting and steel ingot mould, which is applied in the field of steel ingot casting molds and pouring, and can solve problems such as difficult observation and control of steel ingots

Active Publication Date: 2017-05-31
INNER MONGOLIA NORTH HEAVY INDS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Difficult to observe and control during ingot preparation

Method used

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  • A kind of steel ingot pouring mold and pouring method
  • A kind of steel ingot pouring mold and pouring method
  • A kind of steel ingot pouring mold and pouring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 2 As shown, a 6-ton steel ingot with a circular cross-section was trial-produced, the height-to-diameter ratio was 1.38, the pouring molten steel material was H13, and the pouring temperature was 1535°C.

[0036] The taper of the ingot mold used is: (upper opening radius - lower opening radius) / ingot height = 14%-16%, the riser ratio is 16%-18%, and the riser taper is 1%-8%.

[0037] The riser of the steel ingot mold adopts a split hanging insulation board, and the bottom of the insulation board is in contact with the top of the steel ingot body.

[0038] The thickness of the heat insulation plate at the riser of the ingot mold is 50-60mm, and the height is 400-500mm. The heat insulation plate is seamlessly designed according to the size of the riser.

[0039] In the present invention, the mold slag is added by hanging in layers, and the total amount of the mold slag added by hanging is 1.0-1.75 kg per ton of steel.

[0040] Steel ingot pouring process...

Embodiment 2

[0048] Such as image 3 As shown, a 12-ton steel ingot with a circular cross-section was trial-produced, the height-to-diameter ratio was 1.42, the pouring molten steel material was P91, and the pouring temperature was 1555°C. Steel ingot pouring process: first lift the ladle containing the molten steel after refining and soft blowing to the pouring station, and then align the nozzle of the ladle with the center of the bell main pipe to start pouring after the drainage mold station is fully drained.

[0049] The taper of the ingot mold used is: (upper mouth radius - lower mouth radius) / steel ingot height = 14%-15%, the riser ratio is 16%-18%, and the riser taper is 1%-3%.

[0050] The riser of the steel ingot mold adopts a split hanging insulation board, and the bottom of the insulation board is in contact with the top of the steel ingot body.

[0051] The thickness of the heat insulation plate at the riser of the ingot mold is 55-60mm, and the height is 400-450mm. The heat i...

Embodiment 3

[0060] Such as Figure 4 As shown, a 15-ton steel ingot with a circular cross-section was trial-produced, the height-to-diameter ratio was 1.36, the pouring molten steel material was 42CrMo, and the pouring temperature was 1550°C. Steel ingot pouring process: first lift the ladle containing the molten steel after refining and soft blowing to the pouring station, and then align the nozzle of the ladle with the center of the bell main pipe to start pouring after the drainage mold station is fully drained.

[0061] The taper of the ingot mold used is: (upper mouth radius - lower mouth radius) / steel ingot height = 14.1%-14.7%, the riser ratio is 16%-16.8%, and the riser taper is 1%-2.5%.

[0062] The riser of the steel ingot mold adopts a split hanging insulation board, and the bottom of the insulation board is in contact with the top of the steel ingot body.

[0063] The thickness of the heat insulation plate at the riser of the ingot mold is 50-55mm, and the height is 400-480mm...

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Abstract

The invention relates to the field of manufacturing of static ingots, in particular to a pouring mold and pouring method for a steel ingot. The pouring speed of molten steel in a steel ingot mold at different mold filling rates is controlled, the geometrical parameters of the pouring mold for the steel ingot are changed, and therefore the defect problem of internal shrinkage and looseness of the steel ingot is effectively solved; and inclusion enrichment of the steel ingot can be reduced, the volume of a deposition cone is lowered, and the quality and utilization rate of the steel ingot are effectively improved.

Description

technical field [0001] The invention relates to the field of preparation of die-cast steel ingots, in particular to a steel ingot pouring mold and a pouring method. Background technique [0002] In recent years, with the rapid development of heavy machinery and wind power, the demand for large forgings is increasing. At the same time, the quality requirements for large forgings are getting higher and higher. Large-scale forgings are the foundation of supporting equipment in important fields such as energy, electric power, transportation and metallurgical machinery, and are an important symbol to measure the national industrial level. In 2015, the State Council made it clear that improving the level of large-scale equipment manufacturing will be the focus of the country's "Made in China 2025". Steel ingots and billets are the early products of large forgings, and their quality is particularly important to improve the quality of large forgings. The quality of steel ingots or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D7/06B22D7/12
Inventor 徐亚东韩非胡永平石宝凤马杰刘建军王亚明郝维
Owner INNER MONGOLIA NORTH HEAVY INDS GROUP