CN104962708A - Non-oxidation decarbonization protective technique capable of reducing allowance of heat treatment piece - Google Patents
Non-oxidation decarbonization protective technique capable of reducing allowance of heat treatment piece Download PDFInfo
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- CN104962708A CN104962708A CN201510450044.9A CN201510450044A CN104962708A CN 104962708 A CN104962708 A CN 104962708A CN 201510450044 A CN201510450044 A CN 201510450044A CN 104962708 A CN104962708 A CN 104962708A
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- graphite powder
- oxidation
- thermal treatment
- heat treatment
- oil
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Abstract
The invention provides a non-oxidation decarbonization protective technique capable of reducing allowance of a heat treatment piece. Common industrial raw materials are reasonably proportioned and uniformly spread on the workpiece surface, thereby greatly decreasing the oxidation decarbonization during heat treatment, reducing the finishing allowance of the heat treatment workpiece, and further implementing the non-oxidation decarbonization heat treatment on the workpiece.
Description
Technical field
The present invention relates to workpiece guard technology field, particularly relate to a kind of process for protecting reducing the non-oxidation decarburization of thermal treatment part surplus.
Background technology
When workpiece is heat-treated in common electric furnace, the oxidation and decarbonization of workpiece surface generally cannot be avoided, and in order to ensure size and the quality of finished work-piece, each for workpiece portion size must be left certain surplus before heat treatment.Always the non-oxidation carbonization treatment how realizing workpiece in common electric furnace pursues the problem of solution in industry.
At present, the antioxidizing paint that market is sold, mostly use number of chemical material to coordinate according to a certain percentage and form, formula is complicated, and price comparison is high, uses cost high.In order to when lower cost, easy and simple to handle, realize the non-oxidation carbonization treatment of heat treated part, we devise one and utilize water glass and Graphite Powder 99 oil (Graphite Powder 99 and machine oil by weight 1:1 mediation form), by brushing the scheme of protecting workpiece.
Summary of the invention
Object of the present invention is exactly defect for above-mentioned existence and provides a kind of process for protecting reducing the non-oxidation decarburization of thermal treatment part surplus.The present invention utilizes conventional industrial raw material, rational proportion, and uniform application is at workpiece surface, oxidation and decarbonization during thermal treatment significantly can be reduced, so just can reduce the process redundancy needing heat treated part, thus, the non-oxidation decarburization thermal treatment of workpiece can be realized.
A kind of process for protecting technical scheme reducing the non-oxidation decarburization of thermal treatment part surplus of the present invention is comprise the following steps:
Reduce a process for protecting for the non-oxidation decarburization of thermal treatment part surplus, it is characterized in that, comprise the following steps:
(1) workpiece surface to be heated is cleaned out, guarantee without defects such as greasy dirt, burr, wedge angles;
(2) utilize hairbrush at workpiece surface uniform application one deck water glass;
(3) after the drying of water glass layer, by Graphite Powder 99 oil uniform application at workpiece surface.
In step (2), water glass thickness is 1 ~ 2mm.
In step (3), Graphite Powder 99 oil thickness is 1 ~ 2mm.
In step (3), described Graphite Powder 99 oil forms for Graphite Powder 99 and machine oil are in harmonious proportion.
Described Graphite Powder 99 oil is that 600 object Graphite Powder 99s and SJ level machine oil form by weight 1:1 mediation.
Like this, be placed in common electric furnace through the workpiece of protection carry out heating, be incubated after to come out of the stove cooling, workpiece surface is sparkling clean, substantially achieves low or non oxidizing decarburization.
Its ultimate principle is: protective layer is in workpiece heat process, and the Graphite Powder 99 oil on top layer at high temperature burns, and is formed containing CO, CO
2, H
2rich carbon atmosphere, effectively can reduce the decarburization of workpiece surface.
Be positioned at the water glass coating below Graphite Powder 99 oil coating, at high temperature decompose, the silicon dioxide skeleton adhesion layer that intensity is very high under workpiece surface forms high temperature, make surperficial slight oxidation Decarburized layer difficult drop-off in subsequent heat and process of cooling, thus, make oxidation and decarbonization phenomenon more difficult to workpiece Deep Development.
Beneficial effect of the present invention is: the present invention utilizes conventional industrial raw material, rational proportion, oxidation and decarbonization during thermal treatment, at workpiece surface, can significantly reduce by uniform application, heat treated work pieces process surplus so just will be needed by 6 ~ 10mm, reduce to 1 ~ 3mm.The workpiece not high for part surface smoothness requirements, dimensional precision is lower, can realize zero surplus thermal treatment completely.
accompanying drawing illustrates:
Figure 1 shows that workpiece protection effect figure;
Figure 2 shows that the rear workpiece surface photo of quenching.
embodiment:
In order to understand the present invention better, describe technical scheme of the present invention in detail with specific examples below, but the present invention is not limited thereto.
Embodiment 1
42CrMo forges bar steel non-oxidation decarburization Q-tempering
(1) bar steel removing surface to be heated is clean, guarantee without defects such as greasy dirt, burr, wedge angles;
(2) utilize hairbrush to smear one deck water glass at bar steel surface uniform, thickness is 1 ~ 2mm;
(3) after the drying of water glass layer, by 600 object Graphite Powder 99s and SJ level machine oil, the Graphite Powder 99 oil uniform application that is in harmonious proportion of 1:1 is on bar steel surface by weight, and thickness is 1 ~ 2mm, as shown in Figure of description Fig. 1.
The bar steel protected is loaded charging basket, is incorporated to stove and is heated to austenitizing, quenching of coming out of the stove after insulation terminates, the workpiece surface situation after quenching is as shown in Figure of description Fig. 2.As can be seen from Figure of description Fig. 2, through the workpiece of surfacecti proteon, quenching rear surface is sparkling clean.
Claims (5)
1. reduce a process for protecting for the non-oxidation decarburization of thermal treatment part surplus, it is characterized in that, comprise the following steps:
(1) workpiece surface to be heated is cleaned out, guarantee without defects such as greasy dirt, burr, wedge angles;
(2) utilize hairbrush at workpiece surface uniform application one deck water glass;
(3) after the drying of water glass layer, by Graphite Powder 99 oil uniform application at workpiece surface.
2. the process for protecting of the non-oxidation decarburization of minimizing thermal treatment part surplus according to claim 1, is characterized in that, in step (2), water glass thickness is 1 ~ 2mm.
3. the process for protecting of the non-oxidation decarburization of minimizing thermal treatment part surplus according to claim 1, is characterized in that, in step (3), Graphite Powder 99 oil thickness is 1 ~ 2mm.
4. the process for protecting of the non-oxidation decarburization of minimizing thermal treatment part surplus according to claim 1, is characterized in that, in step (3), described Graphite Powder 99 oil forms for Graphite Powder 99 and machine oil are in harmonious proportion.
5. the process for protecting of the non-oxidation decarburization of minimizing thermal treatment part surplus according to claim 4, is characterized in that, described Graphite Powder 99 oil is that 600 object Graphite Powder 99s and SJ level machine oil form by weight 1:1 mediation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510450044.9A CN104962708A (en) | 2015-07-29 | 2015-07-29 | Non-oxidation decarbonization protective technique capable of reducing allowance of heat treatment piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510450044.9A CN104962708A (en) | 2015-07-29 | 2015-07-29 | Non-oxidation decarbonization protective technique capable of reducing allowance of heat treatment piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104962708A true CN104962708A (en) | 2015-10-07 |
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ID=54216793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510450044.9A Pending CN104962708A (en) | 2015-07-29 | 2015-07-29 | Non-oxidation decarbonization protective technique capable of reducing allowance of heat treatment piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104962708A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184831A (en) * | 1996-12-13 | 1998-06-17 | 大重集团公司(大连) | Method for removing coatings of protection for cementation workpieces |
| CN101696328A (en) * | 2009-10-16 | 2010-04-21 | 内蒙古第一机械制造（集团）有限公司 | Protective coating for surface of steel workpiece |
-
2015
- 2015-07-29 CN CN201510450044.9A patent/CN104962708A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184831A (en) * | 1996-12-13 | 1998-06-17 | 大重集团公司(大连) | Method for removing coatings of protection for cementation workpieces |
| CN101696328A (en) * | 2009-10-16 | 2010-04-21 | 内蒙古第一机械制造（集团）有限公司 | Protective coating for surface of steel workpiece |
Non-Patent Citations (2)
| Title |
|---|
| 技工学校机械类通用教材编审委员会编: "《热处理工艺学》", 31 August 1980 * |
| 热处理实践编写组编: "《热处理实践》", 31 October 1973, 国防工业出版社 * |
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| CB02 | Change of applicant information |
Address after: Guanzhuang town Zhangqiu city Ji'nan City, Shandong province 250207 Ji Wang Road No. 9001 Applicant after: SHANDONG IRAETA HEAVY INDUSTRY CO., LTD. Address before: 250207 Zhangqiu, Shandong Province, Wang Ji Road, No. 9001, No. Applicant before: Shandong Iraeta Heavy Industry Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151007 |