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Lanthanum oxide accelerated permeation large-permeation-layer and high-quality salt bath boron-vanadium co-permeation agent and co-permeation process

A technology of co-penetrating agent and lanthanum oxide, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of poor surface quality, slow infiltration rate, thin infiltration layer, etc., to reduce friction coefficient, Good toughness and wear resistance, simple operation effect

Inactive Publication Date: 2017-11-24
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a large infiltration layer and high-quality salt bath boron-vanadium co-infiltration with lanthanum oxide for the common problems of slow permeation speed, thin infiltration layer and poor surface quality in the current boron-vanadium co-infiltration technology. agent and co-infiltration process, it can not only increase the infiltration rate while obtaining boron-vanadium co-infiltration layer with excellent surface quality, but also has good operability and excellent economy

Method used

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  • Lanthanum oxide accelerated permeation large-permeation-layer and high-quality salt bath boron-vanadium co-permeation agent and co-permeation process
  • Lanthanum oxide accelerated permeation large-permeation-layer and high-quality salt bath boron-vanadium co-permeation agent and co-permeation process
  • Lanthanum oxide accelerated permeation large-permeation-layer and high-quality salt bath boron-vanadium co-permeation agent and co-permeation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as Figure 1-4 shown.

[0033] The salt bath boron vanadium co-penetrating agent of the present embodiment is made of lanthanum oxide (La 2 o 3 ) 0.5g, boron oxide (B 2 o 3 ) 50.74g, sodium fluoride (NaF) 25.87g, vanadium pentoxide (V 2 o 5 ) 9.95g, barium chloride (BaCl 2 ) 7.96g, boron carbide (B 4 C) 4.98g composition.

[0034] The boron-vanadium co-infiltration process is: sample surface pretreatment-boron-vanadium co-infiltration treatment-cleaning the sample

[0035] (1) Weigh the raw materials according to the mass percentage of the boron-vanadium co-infiltration agent formula and mix them uniformly mechanically and put them in the crucible for later use; it is best to mechanically mix the prepared salt bath boron-vanadium co-infiltration agent and place it in corundum Cover the crucible, seal it with high-temperature sealant, put it in an oven and dry it at 100°C for 45 minutes.

[0036] (2) Base material pretreatment: the base material of the pre...

Embodiment 2

[0041] Such as Figure 5 shown.

[0042] The salt bath boron vanadium co-penetrating agent of the present embodiment is made of lanthanum oxide (La 2 o 3 ) 0.2g, boron oxide (B 2 o 3 ) 50.87g, sodium fluoride (NaF) 25.98g, vanadium pentoxide (V 2 o 5 ) 9.98g, barium chloride (BaCl 2 ) 7.98g, boron carbide (B 4 C) 4.99g composition.

[0043] The boron-vanadium co-infiltration process is: sample surface pretreatment-boron-vanadium co-infiltration treatment-cleaning the sample

[0044] (1) Weigh the raw materials according to the mass percentage of the boron-vanadium co-infiltration agent formula and mix them uniformly mechanically and put them in the crucible for later use; it is best to mechanically mix the prepared salt bath boron-vanadium co-infiltration agent and place it in corundum Cover the crucible, seal it with high-temperature sealant, put it in an oven and dry it at 100°C for 45 minutes.

[0045] (2) Base material pretreatment: the base material of the prese...

Embodiment 3

[0050] Such as Figure 6 shown.

[0051] The salt bath boron vanadium co-penetrating agent of the present embodiment is made of lanthanum oxide (La 2 o 3 ) 1g, boron oxide (B 2 o 3 ) 50.49g, sodium fluoride (NaF) 25.74g, vanadium pentoxide (V 2 o 5 ) 9.9g, barium chloride (BaCl 2 ) 7.92g, boron carbide (B 4 C) 4.95g composition.

[0052] The boron-vanadium co-infiltration process is: sample surface pretreatment-boron-vanadium co-infiltration treatment-cleaning the sample

[0053] (1) Weigh the raw materials according to the mass percentage of the boron-vanadium co-infiltration agent formula and mix them uniformly mechanically and put them in the crucible for later use; it is best to mechanically mix the prepared salt bath boron-vanadium co-infiltration agent and place it in corundum Cover the crucible, seal it with high-temperature sealant, put it in an oven and dry it at 100°C for 45 minutes.

[0054] (2) Base material pretreatment: the base material of the present ...

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Abstract

The invention discloses a lanthanum oxide accelerated permeation large-permeation-layer and high-quality salt bath boron-vanadium co-permeation agent and a co-permeation process thereof. The salt bath boron-vanadium co-permeation agent regards B2O3 as the base salt and is mainly prepared from boric oxide, sodium fluoride, boron carbide, barium chloride and vanadium pentoxide by a certain mass percent. The process comprises the steps that a workpiece is put into a crucible containing a salt bath agent after the surface of the workpiece is polished and washed, heat preservation is conducted for 4 hours in the environment of 950 DEG C, and boron-vanadium co-permeation is conducted; and residues on the workpiece subjected to boron-vanadium co-permeation are removed. The permeation layer has the better toughness and abrasion resistance, and compared with a permeation agent without lanthanum oxide, the properties of the co-permeation agent with the lanthanum oxide are improved, and the engineering use value is greatly improved.

Description

technical field [0001] The present invention relates to the optimization of a TD salt bath surface modification technology, specifically a method of adding lanthanum oxide infiltrating agent into the salt bath infiltrating agent, and rapidly and efficiently preparing thickened 42CrMo steel surface through chemical thermal diffusion reaction deposition method. boron-vanadium co-infiltrated layer. Background technique [0002] 42CrMo steel is widely used in gear manufacturing and mold production due to its high strength and toughness. However, with the rapid advancement of industrialization, the performance requirements of machine parts for materials are getting higher and higher. Therefore, the development of higher performance materials has become a trend. As the most widely used method of material strengthening, surface engineering has developed vigorously since the 1960s. In order to meet the increasingly rapid development of high requirements for the special properties ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C12/02
CPCC23C12/02
Inventor 许晓静韩天杨松何志盛牛田青
Owner JIANGSU UNIV
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