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N-C-Cr-V-RE multi-element co-diffusion material for 45 steel surface strengthening

A n-c-cr-v-re, surface strengthening technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve the problem of affecting the service life of plastic molds and mechanical parts, poor corrosion resistance, and surface hardness Low-level problems, to achieve the effect of dense permeable layer structure, strong corrosion resistance, and short surface treatment cycle

Active Publication Date: 2016-02-17
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] 45 steel is a common material for plastic molds and mechanical parts. It is cheap and easy to obtain. However, conventional heat treatment or carburizing, nitriding chemical heat treatment has low surface hardness, poor wear resistance, and poor corrosion resistance, which affects the service life of plastic molds and mechanical parts.

Method used

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  • N-C-Cr-V-RE multi-element co-diffusion material for 45 steel surface strengthening
  • N-C-Cr-V-RE multi-element co-diffusion material for 45 steel surface strengthening
  • N-C-Cr-V-RE multi-element co-diffusion material for 45 steel surface strengthening

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First, use 500#, 1000#, 2000#, 3000# sandpaper to polish the 45 steel sample in sequence, and then wash off the sample with acetone, alcohol and water in sequence. Use J-2 type base salt pre-infiltration N-C, the process is 570°C×3h, the process is 570°C×4h, the process is 570°C×5h, oil cooling. The pre-infiltration N-C time is 3h, 4h and 5h respectively, and the infiltration layer tissue under different pre-infiltration time is as follows: figure 1 , figure 2 and image 3 shown.

Embodiment 2

[0028] The N-C-Cr-V-RE multi-component co-infiltration material used for strengthening the surface of 45 steel, the Cr-V-RE co-infiltration material is made of the following raw materials in weight fractions: 52 parts of borax, 6 parts of NaF, K 2 CO 3 7 copies, V2 o 5 6 parts, Cr 2 o 3 2 parts, 4 parts of aluminum powder, 3 parts of RE.

[0029] N-C pre-infiltration: First, use 500#, 1000#, 2000#, 3000# sandpaper to polish the 45 steel sample in sequence, and then wash off the sample with acetone, alcohol and water in sequence. Use J-2 type base salt to pre-infiltrate N-C on 45 steel, the process is: 570℃×4h, oil cooling. Throw away the loose layer of the pre-infiltrated N-C sample, and then wash off the pre-infiltrated sample with acetone, alcohol and water in sequence.

[0030] Cr-V-RE co-infiltration: raise the temperature of the resistance furnace to 850 ° C, start adding borax; add NaF and K at intervals of 10 minutes 2 CO 3 Mix and add borax to adjust the fluidit...

Embodiment 3

[0034] The N-C-Cr-V-RE multi-component co-infiltration material used for strengthening the surface of 45 steel, the Cr-V-RE co-infiltration material is made of the following raw materials in weight fractions: 58 parts of borax, 9 parts of NaF, K 2 CO 3 10 copies, V 2 o 5 9 parts, Cr 2 o 3 3 parts, 6.5 parts of aluminum powder, 4.5 parts of RE.

[0035] N-C pre-infiltration: use 500#, 1000#, 2000#, 3000# sandpaper to polish the 45 steel sample in sequence, and then wash off the sample with acetone, alcohol and water in sequence. Use J-2 type base salt to pre-infiltrate N-C on 45 steel, the process is: 570℃×4h, oil cooling. Throw away the loose layer of the pre-infiltrated N-C sample, and then wash off the pre-infiltrated sample with acetone, alcohol and water in sequence.

[0036] Cr-V-RE co-infiltration: raise the temperature of the resistance furnace to 850 ° C, start adding borax; add NaF and K at intervals of 10 minutes 2 CO 3 Mix and add borax to adjust the fluidit...

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Abstract

The invention discloses an N-C-Cr-V-RE multi-element co-diffusion material for 45 steel surface strengthening. The co-diffusion material comprises the following two parts including a J-2 base salt material and a Cr-V-RE co-diffusion material, wherein the Cr-V-RE co-diffusion material is prepared from borax, NaF, K2CO3, V2O5, Cr2O3, aluminum powder and RE. After being subjected to 570 DEG C*4h N-C pre nitrocarburizing, 950 DEG C*6h Cr-V-RE co-diffusion and 550 DEG C*2h tempering, the diffusion layer structure of 45 steel is compact and continuous and high in corrosion resistance and hardness, and surface strengthening properties of corrosion resistance and abrasion resistance of plastic molds and various mechanical parts are guaranteed. The process is simple; the operation is convenient; the heat treatment period is short; the controllability is high; the property defects of unit diffusion metal or nonmetal are overcome; the application prospects are quite wide.

Description

technical field [0001] The invention relates to the field of surface strengthening of molds and mechanical parts, in particular to an N-C-Cr-V-RE multi-component co-infiltration material used for surface strengthening of 45 steel. Background technique [0002] 45 steel is a common material for plastic molds and mechanical parts. It is cheap and easy to obtain. However, conventional heat treatment or carburizing, nitriding chemical heat treatment has low surface hardness, poor wear resistance, and poor corrosion resistance, which affects the service life of plastic molds and mechanical parts. . [0003] Conventional plastic molds and mechanical parts surface strengthening technology can be roughly divided into three categories; the first category is surface heat treatment including surface quenching and chemical heat treatment, surface quenching includes induction hardening, pulse quenching, flame quenching, etc., chemical heat treatment such as nitriding, carburizing , Nitr...

Claims

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Application Information

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IPC IPC(8): C23C12/00C21D1/18
CPCC21D1/18C23C12/00
Inventor 庞祖高覃海泉韦世宝
Owner GUANGXI UNIV
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