CN103464766A - Method for preparing metal product with high surface hardness and high surface wear resistance - Google Patents
Method for preparing metal product with high surface hardness and high surface wear resistance Download PDFInfo
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- CN103464766A CN103464766A CN 201310366511 CN201310366511A CN103464766A CN 103464766 A CN103464766 A CN 103464766A CN 201310366511 CN201310366511 CN 201310366511 CN 201310366511 A CN201310366511 A CN 201310366511A CN 103464766 A CN103464766 A CN 103464766A
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Abstract
The invention discloses a method for preparing a metal product with high surface hardness and high surface wear resistance. The preparation method comprises the following steps: preparing a substrate blank, coating the surface, drying, shaping, sintering and performing acceptance inspection, wherein a raw material adopted in the surface coating is a surface hardened alloy. Through the way, a narrow mutual soluble area is formed on an interface between the metal substrate and a coating, so that the surface of the prepared metal product has the physicochemical characteristics of various use requirements on wear resistance, corrosion resistance, oxidation resistance and the like.
Description
Technical field
The present invention relates to the metallic article technical field, particularly relate to the preparation method that a kind of surface has high-hardness, wearable erosion property metallic article.
Background technology
With regard to the case hardness of metallic article, no matter be through certain heat treated structural steel or chilled cast iron, its case hardness HRC value generally can only reach 60 left and right, if continue to improve the case hardness of steel with methods such as heat treatment or chemical treatments, will increase fragility and affects actual use.For making metal material surface hardness higher and there is certain structural strength, PM technique has appearred.PM technique can be brought up to the case hardness HRC value of metallic article more than 70, but owing to being suppressed and the restriction of sintering process method, and powder metallurgy is can only manufacturing dimension less, the better simply goods of structure, for example sintered carbide wire drawing die.Like this, the structural metallic materials of HRC value between 60～70 is substantially blank.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of preparation method of high-hardness, wearable erosion metallic article, can the metal material of preparation table surface hardness HRC value between 60～70.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of surface to have the preparation method of high-hardness, wearable erosion property metallic article, it is characterized in that, its preparation methods steps comprises: matrix blank-surface coating-oven dry-correction of the flank shape-sintering-examination, the raw material that described surface applies is surperficial hardening agent.
In a preferred embodiment of the present invention, described surperficial hardening agent is at least one in Ni62 NiCrBSi tetra-element types and Co50 CoCrW three elements type.
In a preferred embodiment of the present invention, described matrix blank is prepared from by structural steel.
In a preferred embodiment of the present invention, described clinkering process is to carry out in the high-temp alloying furnace of the following vacuum of 30 Pa, and described clinkering process is divided into the volatilization of retinal and 2 stages of consolidation of surperficial hardening agent.
In a preferred embodiment of the present invention, the initial volatilization temperature of described retinal is 200 ℃, and volatilization temperature is 325 ℃ fully.
In a preferred embodiment of the present invention, the consolidation process of described surperficial hardening agent is: when the temperature in high temperature furnace reaches 900 ℃, hardening agent starts to have liquid phase sintering to occur and be tending towards, when temperature rises to 1000 ℃, the surface of the fully molten stream of increasing liquid phase complete wetting matrix to be coated with, there is the coating alloy composition of half still to exist with solid-state simultaneously, be incubated 30min at this temperature, the district that makes to dissolve each other reaches one fixed width, have a power failure and be cooled to 200 ℃ immediately, metallic article is taken out to high temperature furnace and complete whole sintering processes.
In a preferred embodiment of the present invention, the width in the described district of dissolving each other is 15～20 μ m.
The invention has the beneficial effects as follows: a kind of surface of the present invention has the preparation method of high-hardness, wearable erosion property metallic article, in narrow district of dissolving each other of interface formation of metallic matrix and coating, make the metallic article surface of preparation there is the physical and chemical performance of the various instructions for uses such as wear-resisting, anti-corrosion, resistance to oxidation.
The accompanying drawing explanation
Fig. 1 is the preparation method's of a kind of high-hardness, wearable erosion of the present invention metallic article process flow diagram;
Fig. 2 be shown in the dissolve each other schematic diagram in district of metallic article;
In accompanying drawing, the mark of each parts is as follows: 1. matrix blank, the district of 2. dissolving each other, 3. surperficial hardening agent.
The specific embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Refer to Fig. 1 and Fig. 2, the embodiment of the present invention comprises:
A kind of surface has the preparation method of high-hardness, wearable erosion property metallic article, it is characterized in that, its preparation methods steps comprises: matrix blank-surface coating-oven dry-correction of the flank shape-sintering-examination, the raw material that described surface applies is surperficial hardening agent.
In the embodiment of the present invention, surperficial hardening agent used is Ni62 NiCrBSi tetra-element types, and matrix blank used is prepared from by structural steel.
Embodiment
Apply No. 62 NiCrBSi of layer of Ni tetra-element type surface hardening agents on the metal blank surface prepared by structural steel, put into high-temp alloying furnace after oven dry, and the vacuum arranged in stove is 30 Pa; For making rosin decompose the too fierce so that avalanche coating of volatilization, high temperature furnace slowly is warming up to 200 ℃ with the programming rate of 5 ℃/min, retinal starts volatilization, continues to be warming up to 325 ℃, and now retinal volatilizees complete fully; Then the programming rate of adjusting high temperature furnace is that 20 ℃/min is rapidly heated to 900 ℃, now the hardening agent on matrix blank surface starts to have liquid phase sintering to occur and be tending towards, when temperature rises to 1000 ℃, the surface of the fully molten stream of increasing liquid phase complete wetting matrix to be coated with, there is the coating alloy composition of half still to exist with solid-state simultaneously, be incubated 30min at this temperature, the district that makes to dissolve each other reaches the width of 15～20 μ m, have a power failure and be cooled to 200 ℃ immediately, metallic article is taken out to high temperature furnace and complete whole sintering processes.Metallic article after sintering is carried out an acceptance inspection.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present invention.
Claims (7)
1. a surface has the preparation method of high-hardness, wearable erosion property metallic article, it is characterized in that, its preparation methods steps comprises: matrix blank-surface coating-oven dry-correction of the flank shape-sintering-examination, the raw material that described surface applies is surperficial hardening agent.
2. surface according to claim 1 has the preparation method of high-hardness, wearable erosion property metallic article, it is characterized in that, described surperficial hardening agent is at least one in Ni62 NiCrBSi tetra-element types and Co50 CoCrW three elements type.
3. surface according to claim 1 has the preparation method of high-hardness, wearable erosion property metallic article, it is characterized in that, described matrix blank is prepared from by structural steel.
4. surface according to claim 1 has the preparation method of high-hardness, wearable erosion property metallic article, it is characterized in that, described clinkering process is to carry out in the high-temp alloying furnace of the following vacuum of 30 Pa, and described clinkering process is divided into the volatilization of retinal and 2 stages of consolidation of surperficial hardening agent.
5. surface according to claim 4 has the preparation method of high-hardness, wearable erosion property metallic article, it is characterized in that, the initial volatilization temperature of described retinal is 200 ℃, and volatilization temperature is 325 ℃ fully.
6. surface according to claim 4 has the preparation method of high-hardness, wearable erosion property metallic article, it is characterized in that, the consolidation process of described surperficial hardening agent is: when the temperature in high temperature furnace reaches 900 ℃, hardening agent starts to have liquid phase sintering to occur and be tending towards, when temperature rises to 1000 ℃, the surface of the fully molten stream of increasing liquid phase complete wetting matrix to be coated with, there is the coating alloy composition of half still to exist with solid-state simultaneously, be incubated 30min at this temperature, the district that makes to dissolve each other reaches one fixed width, have a power failure and be cooled to 200 ℃ immediately, metallic article is taken out to high temperature furnace and complete whole sintering processes.
7. surface according to claim 6 has the preparation method of high-hardness, wearable erosion property metallic article, it is characterized in that, the width in the described district of dissolving each other is 15～20 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201310366511 CN103464766A (en) | 2013-08-19 | 2013-08-19 | Method for preparing metal product with high surface hardness and high surface wear resistance |
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| CN 201310366511 CN103464766A (en) | 2013-08-19 | 2013-08-19 | Method for preparing metal product with high surface hardness and high surface wear resistance |
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| CN103464766A true CN103464766A (en) | 2013-12-25 |
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| CN 201310366511 Pending CN103464766A (en) | 2013-08-19 | 2013-08-19 | Method for preparing metal product with high surface hardness and high surface wear resistance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195224A (en) * | 2019-06-26 | 2019-09-03 | 青岛石大华通科技有限公司 | A kind of steel body PDC drill bit case hardening process |
-
2013
- 2013-08-19 CN CN 201310366511 patent/CN103464766A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195224A (en) * | 2019-06-26 | 2019-09-03 | 青岛石大华通科技有限公司 | A kind of steel body PDC drill bit case hardening process |
| CN110195224B (en) * | 2019-06-26 | 2021-04-23 | 青岛石大华通科技有限公司 | Surface hardening method for steel PDC drill bit |
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Application publication date: 20131225 |
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| WD01 | Invention patent application deemed withdrawn after publication |