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Method for predicting vermicularity of hypereutectic vermicular graphite cast iron

A technology of vermicular graphite cast iron and hypereutectic, which is applied in the field of predicting the creep rate of vermicular graphite cast iron with hypereutectic composition, and can solve problems such as the inability to predict the creep rate of vermicular graphite cast iron with hypereutectic composition

Inactive Publication Date: 2018-06-08
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: a method for predicting the creep rate of hypereutectic vermicular graphite cast iron, recording the change of temperature of the hypereutectic vermicular graphite cast iron molten iron with time through the computer measurement and control system and drawing the cooling curve , the cooling curve is differentially processed to obtain a differential curve, and the creeping rate of the molten iron is further calculated to predict the creeping effect of the molten iron, overcoming the fact that the prior art cannot predict the vermicular component of the hypereutectic graphite cast iron. rate of defect

Method used

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  • Method for predicting vermicularity of hypereutectic vermicular graphite cast iron
  • Method for predicting vermicularity of hypereutectic vermicular graphite cast iron

Examples

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Effect test

Embodiment 1

[0054] The hypereutectic vermicular graphite cast iron glass mold casting is prepared, and the vermicular rate of the product is required to be greater than 80%.

[0055] The first step is to record the change of temperature of the hypereutectic vermicular graphite cast iron molten iron with time through the computer measurement and control system and draw the cooling curve:

[0056] Get the vermicular graphite cast iron molten iron that has been processed through vermicularization and inoculation and pour it into a disclosed furnace front thermal analysis temperature collection sample cup of CN206002472U. A K-type thermocouple arranged in the center of the sample cup tests the vermicular graphite cast iron molten iron in the sample cup The temperature signal during the sample solidification process is converted into an electromotive force signal, and the electromotive force signal is transmitted to a computer measurement and control system RT-2009 vermicular graphite cast iron...

Embodiment 2

[0067] A hypereutectic vermicular graphite cast iron piston ring is prepared, and the product requires a vermicular rate greater than 80%.

[0068] The first step is to record the change of temperature of the hypereutectic vermicular graphite cast iron molten iron with time through the computer measurement and control system and draw the cooling curve:

[0069] Get the vermicular graphite cast iron molten iron that has been processed through vermicularization and inoculation and pour it into a disclosed furnace front thermal analysis temperature collection sample cup of CN206002472U. A K-type thermocouple arranged in the center of the sample cup tests the vermicular graphite cast iron molten iron in the sample cup The temperature signal during the sample solidification process is converted into an electromotive force signal, and the electromotive force signal is transmitted to a computer measurement and control system RT-2009 vermicular graphite cast iron intelligent online mea...

Embodiment 3

[0080] The hypereutectic vermicular graphite cast iron glass mold casting is prepared, and the vermicular rate of the product is required to be greater than 80%.

[0081] The first step is to record the change of temperature of the hypereutectic vermicular graphite cast iron molten iron with time through the computer measurement and control system and draw the cooling curve:

[0082] Get the vermicular graphite cast iron molten iron that has been processed through vermicularization and inoculation and pour it into a disclosed furnace front thermal analysis temperature collection sample cup of CN206002472U. A K-type thermocouple arranged in the center of the sample cup tests the vermicular graphite cast iron molten iron in the sample cup The temperature signal during the sample solidification process is converted into an electromotive force signal, and the electromotive force signal is transmitted to a computer measurement and control system RT-2009 vermicular graphite cast iron...

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Abstract

The invention discloses a method for predicting the vermicularity of hypereutectic vermicular graphite cast iron. The state of a material is tested through using a thermal analysis technology to testthe material, a computer measurement and control system is used to record the change of the temperature of molten iron of the hypereutectic vermicular graphite cast iron with time and draw a cooling curve, the cooling curve undergoes differential treatment to obtain a differential curve, and further computing is performed to obtain the vermicularity of the molten iron, and the vermicularity of themolten iron is used to predicate the vermicularizing effect of the molten iron. A defect that the vermicularity of the hypereutectic vermicular graphite cast iron cannot be predicated in the prior art is overcome.

Description

technical field [0001] The technical scheme of the invention relates to testing materials by testing the state of the materials by applying a thermal analysis method, specifically a method for predicting the creep rate of hypereutectic vermicular graphite cast iron. Background technique [0002] Vermicular graphite cast iron not only has the good thermal conductivity, shock absorption and casting performance of gray cast iron, but also has the advantages of high strength and good toughness of ductile cast iron. At the same time, its wear resistance and thermal fatigue resistance are better than these two materials. Excellent overall performance. In the 1970s, vermicular graphite cast iron began to be used in the manufacture of motor casings, crankshaft drive boxes, brake drums, ingot molds and high-horsepower diesel engine cylinder heads to replace high-strength gray iron, alloy cast iron, malleable cast iron and some ductile iron. . By the end of the 20th century, with th...

Claims

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Application Information

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IPC IPC(8): G01N25/20G01N25/04
CPCG01N25/04G01N25/20
Inventor 刘金海王继俭薛海涛付彬国赵雪勃董天顺
Owner HEBEI UNIV OF TECH
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