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Surface wear-resistant strengthening treatment method for high-carbon cold work die steel

A cold work die steel and strengthening treatment technology, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problem of unstable quality of vanadium infiltration layer, and achieve good process energy saving and good bonding strength , the effect of a wide range of applications

Inactive Publication Date: 2013-07-31
WUXI SHENGYUAN METAL PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] At present, how to solve the problem of unstable quality of mixed salt bath vanadium layer is the key issue that restricts the wide application of mixed salt bath

Method used

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  • Surface wear-resistant strengthening treatment method for high-carbon cold work die steel
  • Surface wear-resistant strengthening treatment method for high-carbon cold work die steel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: A method for surface wear-resisting strengthening treatment of high-carbon cold-working die steel, wherein the material of the high-carbon cold-working die steel is Cr12MoV, comprising the following steps:

[0025] (1) Preparation of salt bath mixture: first add borax to a stainless steel crucible, heat the salt bath at 950°C for 4 hours, then add BCl 2 , NaCl and KCl, stir evenly, after 15min, add V 2 o 5 and metal yttrium, stir evenly, after 20 minutes, add aluminum, stir evenly, after 20 minutes, raise the temperature to 1060 ℃, keep warm for 3 hours;

[0026] (2) Salt bath: put high-carbon cold-work die steel at room temperature, co-infiltrate for 6 hours, and keep the temperature at 1060 °C to obtain a vanadium-carbon-boron wear-resistant layer on the surface;

[0027] (3) Quenching and tempering: Quenching directly, and then tempering at 220oC for 10 hours.

[0028] The element content mass percent of the salt bath mixture is: 80% borax, 3% BCl ...

Embodiment 2

[0030] Embodiment 2: With reference to Embodiment 1, the material of high carbon cold working die steel is T12A, including the following steps:

[0031] (1) Preparation of salt bath mixture: first add borax to a stainless steel crucible, heat the salt bath at 960°C for 4 hours, and then add BCl 2 , NaCl and KCl, stir evenly, after 16min, add V 2 o 5 and metal yttrium, stir evenly, after 18 minutes, add aluminum, stir evenly, after 20 minutes, heat up to 1050 ℃, keep warm for 4 hours;

[0032] (2) Salt bath co-infiltration: put high-carbon cold-work die steel at room temperature, co-infiltrate for 6 hours, and keep the temperature at 1050 ℃ to obtain a vanadium-carbon-boron wear-resistant layer on the surface;

[0033] (3) Quenching and tempering: Quenching directly, and then tempering at 200oC for 10 hours.

[0034] The element content mass percent of the salt bath mixture is: 82% borax, 3.5% BCl 2 , 0.5% NaCl, 2.5% KCl, 6% V 2 o 5 , 1.5% metal yttrium, 4% aluminum.

...

Embodiment 3

[0036] Embodiment 3: With reference to Embodiment 1, the material of high carbon cold work die steel is GCr15, comprising the following steps:

[0037] (1) Preparation of salt bath mixture: first add borax to a stainless steel crucible, heat the salt bath to 945°C for 4 hours, then add BCl 2 , NaCl and KCl, stir evenly, after 18min, add V 2 o 5 and metal yttrium, stir evenly, after 20min, add aluminum, stir evenly, after 20min, heat up to 1060 ℃, keep warm for 3.5 hours;

[0038] (2) Salt bath co-infiltration: put high-carbon cold-work die steel at room temperature, co-infiltrate for 6 hours, and keep the temperature at 1060 ℃ to obtain a vanadium-carbon-boron wear-resistant layer on the surface;

[0039] (3) Quenching and tempering: Quenching directly, and then tempering at 210oC for 10 hours.

[0040] The element content mass percent of the salt bath mixture is: 81% borax, 3% BCl 2 , 1% NaCl, 2% KCl, 6.5% V 2 o 5 , 1.5% metal yttrium, 5% aluminum.

[0041] The vana...

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Abstract

The invention relates to a surface wear-resistant processing technology for a high-carbon cold work die steel, and particularly relates to a preparation method for vanadium-carbon-boron wear-resistant layer of the high-carbon cold work die steel. According to the method, a salt bath formed by mixing borax and BCl2+NaCl+KCl according to a certain proportion is used as a carrier; V2O5, Al and the metal yttrium are added in the salt bath; and the above materials are permeated for 6 hours at a temperature of 1,040-1,060 DEG C. The thickness of the vanadium-carbon-boron wear-resistant layer prepared by the method is 12-15 [mu]m; the hardness is HV2,900-3,3300; the vanadium-carbon-boron wear-resistant layer is compact in microstructure, and has good bonding strength with a matrix, excellent wear resistance, seizure resistance and anti-stripping capacity; and the wear-resistant layer is stable in quality. The high-carbon cold work die steel is directly subjected to quenching (or normalizing) and tempering for 8-10 hours at a temperature of 200-250 DEG C after the vanadium-carbon-boron penetrating treatment, so that toughness of the matrix is not reduced; and service life of the die is increased by a plurality times to ten times. Besides, the method is pollution-free in treatment process and good in energy conservation, and overcomes the disadvantages of unstable quality of vanadizing layer in mixed salt bath.

Description

technical field [0001] The invention relates to a surface wear-resistant treatment technology for high-carbon cold-work die steel, in particular to a method for preparing a vanadium-carbon-boron wear-resistant layer on the surface of high-carbon cold-work die steel, so as to improve the service performance and service life of the cold-work die steel. Background technique [0002] Since the 1960s, surface engineering has developed vigorously. In order to meet the increasingly fast-growing high requirements for the special properties of the material surface, many new surface treatment methods have been developed. Among them, the method proposed by Japan uses a molten salt bath on the surface of the mold The TD method of forming carbide coating has successfully solved the problem of surface wear resistance of many molds. In this treatment method, the material to be treated is first immersed in a molten salt bath in the atmosphere, followed by cooling with oil or air to strength...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/24
Inventor 蒋东华王振生李开春
Owner WUXI SHENGYUAN METAL PRODS
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