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A low-temperature solid multi-component boronizing process on the surface of workpieces

A workpiece surface, low-temperature technology, applied in the field of boronizing technology, can solve the problems of discontinuous boride layer, easy to peel off, easy to fall off, etc., and achieve the effect of enhanced activity of boron atoms, increased diffusion rate, and wide application fields

Inactive Publication Date: 2016-05-04
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to high temperature boronizing (850℃~950℃), there are obvious disadvantages: high boronizing temperature, long time, large deformation of workpiece after heat treatment; boronizing layer is brittle, not firmly bonded to the substrate, and easy to peel off; in view of this domestic Foreign experts and scholars focus on the low-temperature boronizing process to solve the problem of high-temperature boronizing
Some low-temperature boronizing processes control the boronizing temperature at 680°C, the holding time is 6h, and the boride layer is a single Fe 2 B, the boride layer is continuous, brittle, easy to fall off, and the thickness is 10μm-15μm; there is also a boronizing process that controls the boronizing temperature at 650°C and the holding time is 6h, but the boride layer is discontinuous, brittle, and There are holes, and the transition zone at the front of the boride layer is wide, with a thickness of 5μm-10μm

Method used

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  • A low-temperature solid multi-component boronizing process on the surface of workpieces
  • A low-temperature solid multi-component boronizing process on the surface of workpieces
  • A low-temperature solid multi-component boronizing process on the surface of workpieces

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Effect test

Embodiment 1

[0019] Embodiment 1: A low-temperature solid multi-component boronizing process on the surface of a workpiece, including the steps of compression deformation treatment before infiltration, multilateral treatment before infiltration, co-infiltration agent preparation, workpiece packing, and boron-chromium-rare-earth co-infiltration steps.

[0020] The No. 20 steel sample was subjected to compression deformation treatment before infiltration, polygonal treatment, boron-chromium-rare earth co-infiltration, and boride layer was observed after infiltration. The process is as follows:

[0021] 1. Compression deformation treatment before infiltration

[0022] The WDW-100 microcomputer-controlled electronic universal testing machine was used to compress and deform No. 20 steel, and the deformation was 30%.

[0023] 2. Multilateralization treatment before infiltration

[0024] The pre-infiltration multilateral treatment is carried out on No. 20 steel, the process is 550 ° C × 30 min,...

Embodiment 2

[0035] Embodiment 2: A low-temperature solid multi-component boronizing process on the surface of a workpiece, including the steps of compression deformation treatment before infiltration, polygonal treatment before infiltration, preparation of co-infiltration agent, boxing of workpiece, and co-infiltration of boron, chromium and rare earth.

[0036] The No. 20 steel sample was subjected to compression deformation treatment before infiltration, polygonal treatment, boron-chromium-rare earth co-infiltration, and boride layer was observed after infiltration. The process is as follows:

[0037] 1. Compression deformation treatment before infiltration

[0038] The WDW-100 microcomputer-controlled electronic universal testing machine was used to compress and deform No. 20 steel, and the deformation was 30%.

[0039] 2. Multilateralization treatment before infiltration

[0040] The pre-infiltration multilateral treatment is carried out on No. 20 steel, the process is 550 ° C × 30 ...

Embodiment 3

[0051] Embodiment 3: A low-temperature solid multi-component boronizing process on the surface of a workpiece, including compression deformation treatment before infiltration, polygonal treatment before infiltration, co-infiltration agent preparation, workpiece packing, and boron-chromium-rare-earth co-infiltration steps.

[0052] The No. 45 steel sample was subjected to compression deformation treatment before infiltration, polygonal treatment, boron-chromium-rare earth co-infiltration, and boride layer was observed after infiltration. The process is as follows:

[0053] 1. Compression deformation treatment before infiltration

[0054] The WDW-100 microcomputer-controlled electronic universal testing machine was used to compress and deform No. 45 steel, and the deformation amount was 30%.

[0055] 2. Multilateralization treatment before infiltration

[0056] The pre-infiltration multilateral treatment is carried out on No. 45 steel, the process is 450 ° C × 30 min, air cool...

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Abstract

The invention discloses a low-temperature solid multi-element boronizing process for a work-piece surface. The process comprises the following steps: compression and deformation treatment before infiltration, multilateral treatment before infiltration, copermeation agent preparation, work-piece binning, and chromium-boron rare earth nitrocarburizing, wherein in the boron-chromium-rare earth nitrocarburizing step, sealing a self-made infiltration bin by adopting dual-layer sodium silicate mud, placing at room temperature for 24 hours, heating up to 570-600 DEG C, and then charging into a heating furnace, preserving heat for 6 hours and cooling along with the furnace. The low-temperature solid multi-element boronizing process has the advantages of being small in brittleness of a boride layer on the work-piece surface, continuous, firm to combine with a substrate, relatively thick in the boride layer which is about 15-23mu m, wide in application field, good in economical efficiency and the like.

Description

technical field [0001] The invention relates to a boronizing process, in particular to a low-temperature solid multi-component boronizing process on the surface of a workpiece. Background technique [0002] With the rapid development of science and technology, the modification technology of the workpiece surface has been greatly developed, especially the deformation chemical heat treatment technology. It has attracted widespread attention for its special advantages of improving the microstructure of the infiltrated layer, greatly improving the properties related to surface strengthening such as wear resistance and fatigue resistance of steel parts, and saving energy and reducing production costs. Solid boronizing technology is one of the methods. Boronizing is a thermochemical surface strengthening technique in which boron atoms diffuse to the metal surface to form metal borides. The boride layer has excellent characteristics of high hardness, corrosion resistance, wear re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C12/02
Inventor 袁兴栋许斌杨晓洁石磊
Owner SHANDONG JIANZHU UNIV