CN1015004B - Low-temp. salt bath vanadium nitrogen sulphur common seeping technology - Google Patents
Low-temp. salt bath vanadium nitrogen sulphur common seeping technologyInfo
- Publication number
- CN1015004B CN1015004B CN 89108123 CN89108123A CN1015004B CN 1015004 B CN1015004 B CN 1015004B CN 89108123 CN89108123 CN 89108123 CN 89108123 A CN89108123 A CN 89108123A CN 1015004 B CN1015004 B CN 1015004B
- Authority
- CN
- China
- Prior art keywords
- vanadium
- present
- salt bath
- temp
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Lubricants (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The present invention relates to a new low temperature salt bath chemical heat treatment process by which vanadium, nitrogen and sulfur co-penetration is realized under the condition that basal bodies of workpieces do not have phase changes below the temperature of 600 DEG C. Except steel grades of which the final tempering temperature is below 530 DEG C, the present invention can treat other steel workpieces in any steel grades; after the treatment of the present invention, the workpiece has the advantages of good adhesive abrasion resistance, grain-abrasion resistance, antifriction, seizure resistance, fatigue performance resistance and wide application area. In addition, the present invention has the characteristics of little treated workpiece deformation, simple equipment, low energy consumption, no pollution operation realization, etc.
Description
The invention belongs to the thermo-chemical treatment field.
The problem of ubiquity friction and wear failure aspect in the mechanical engineering, the frictional wear that takes place between the friction pair of machinery zero, parts relative movement has representative widely.In order to solve this class problem that mechanical component exist, people are carrying out many research work aspect material and the material surface processing, to improve the tribological property of correlated parts.For example adopt chemical heat treatment method, can form infiltration layer at machinery part surface with new wear-resisting, antifriction characteristic, thus the work-ing life of improving component of machine.
China's mechanical engineering journal (V.123, NO, 1, the pollution-free sulphonitrocarburizing institute technology of research such as the Hu Yizheng that 1987P55-62) delivers, for 45 steel, gained nitrided layer hardness≤H
V0.05650, good antifriction is arranged, the dead and anti-adhesive wear characteristic of anti-bite, but wear-resistant grinding abrasion is poor; Known vanadinizing layer hardness is very high, generally can reach H
V0.051800-2500, good wear-resistant grinding abrasion characteristic is arranged, but anti-adhesive wear is poor, and existing vanadinizing technology is all carried out under 800-1000 ℃ high temperature, wait the research work that the people carries out (seeing No. 1 P8-16 of Japan's " thermal treatment " magazine 15 volumes, clear and in February, 50) thoroughly as the new well of Japan, owing to the treatment temp height, so workpiece deformation is bigger, its application is restricted.
The objective of the invention is to develop a kind of that can implement at low temperature, have the wait indefinitely thermo-chemical treatment infiltration layer of comprehensive tribological property of wear-resistant grinding abrasion and anti-adhesive wear, antifriction, anti-bite concurrently.For this reason, low temperature salt-bath vanadium nitrogen sulphur common seeping technology of the present invention is proposed.
Vanadium nitrogen sulphur common seeping technology of the present invention is characterised in that: ooze salt altogether and form by containing vanadium base salt (code name FJ, the salt of promptly working) and regenerant salt (code name ZS), this contains vanadium base salt and comprises and contain the vanadium thing, urea, alkaline carbonate, halogen compounds, the said vanadium thing that contains of sulfocompound and reductive agent is V
2O
5, vanadium iron or pure vanadium powder, sulfocompound are K
2S, Na
2S, Na
2SO
3Or Na
2S
2O
3Or Na
2S
2O
3, reductive agent is an aluminium powder; This regenerant salt comprises and contains vanadium thing, urea and halogen compounds.Said as work salt bath the composition range that contains vanadium base salt by weight % be:
（NH
2）
2CO 25-50%
Na
2CO
320-30%
K
2CO
315-25%
Li
2CO
32-8%
NaF+NaCl 5-11%
Vanadium contains vanadium thing thing+sulfocompound+reductive agent 1-5%
Wherein reductive agent is aluminium and/or rare earth.
The composition range of said regenerant salt, % is by weight:
Urea 65-85%
Contain vanadium thing 10-20%
Halogen compounds 5-20%
Oozing treatment temp altogether is 530-600 ℃.Adopt general external-heat crucible heat treatment furnace to ooze processing altogether to workpiece.According to particular cases such as fused salt weight and workpiece batches, whenever worked 12～36 hours continuously or totally, with regenerant salt adjustment work salt bath once, to keep the activity of work salt bath necessity.
W18C by confusion technology processing of the present invention
rThe 4V speedy steel cutting-tool, nitrided layer hardness HV
0.05〉=1400; 45 of processing
#Steel work, nitrided layer hardness HV
0.05〉=920, this co-penetration layer is through X-ray diffraction analysis, truly has to contain vanadium and exist mutually, and the vanadium, nitrogen, the element sulphur that detect with electronic scanning distribute and be shown in Fig. 1.
The vanadium nitrogen sulphur common seeping layer that obtains by the present invention has good antifriction, anti-adhesive wear, wear-resistant grinding abrasion, anti scuffing, the anti-bite comprehensive tribological property of waiting indefinitely; and significant provide protection is arranged to join secondary not surface treated even part with it; reduce even also join the duplicate abrasion loss, antifriction performance improves.
Advantage of the present invention is:
1. treatment temp is low, and the variable quantity that workpiece substrate does not have phase transformation and size and geometrical shape is very little;
2. the CN in the co-diffused salt bath
-Concentration can be controlled in below 0.4%, can realize pollution-free operation.
3. compare with the sulphonitrocarburizing layer, owing to participating in of vanadium increased substantially nitrided layer hardness;
4. the antifriction of infiltration layer, anti-adhesive wear, wear-resistant grinding abrasion, anti scuffing, the anti-bite comprehensive tribological property of waiting indefinitely is good.
Description of drawings:
Fig. 1 detects the present invention's draw the vanadium nitrogen of co-penetration layer and the distribution of sulphur with electronic scanning.
Fig. 1-a is the v element line sweep;
Fig. 1-b is the nitrogen elemental line scan;
Fig. 1-c is the element sulphur line sweep.
Embodiment 1:
Handle material: 45 steel
The salt bath composition:
（NH
2）
2CO 30-40%
Na
2CO
325%
K
2CO
318%
Li
2CO
35%
NaF+NaCl 10%
Contain vanadium thing+sulfocompound+reductive agent 4%
Treatment process: 580 ℃ * 4 hours
Result: infiltration layer compound layer depth 18 μ m, the diffusion layer degree of depth 〉=0.6mm, compound layer hardness HV
0.05945
Embodiment 2
Handle material W18Cr4V
Salt bath composition: (NH
2)
2CO 25-35%
Na
2CO
330%
K
2CO
320%
Li
2CO
36%
NaF+NaCl 10%
Contain vanadium thing+sulfocompound+reductive agent 4%
Treatment process: 560 ℃ * 4 hours
Result: the infiltration layer compound layer depth 10 μ m diffusion layer degree of depth 〉=0.1mm, compound layer hardness HV
0.051450.
Embodiment 3
Handle material: HT20-40
Salt bath composition: (NH
2)
2CO 32-40%
Na
2CO
320%
K
2CO
322%
Li
2CO
37%
NaF+NaCl 8%
Contain vanadium thing+sulfocompound+reductive agent 3%
Treatment process 550 ℃ * 4 hours
Result: infiltration layer compound layer depth 12 μ m, diffusion layer depth 〉=0.1mm, compound layer hardness Hv
0.05920.
Claims (1)
1, a kind of vanadium nitrogen sulphur common seeping chemical heat treatment process is characterized in that oozing altogether and handles salt bath composition (% by weight) and be: (NH
2)
2CO25-50%, Na
2CO
320-30%, K
2CO
315-25%, Li
2CO
32-8%, NaF+NaCl5-11%, contain vanadium thing+sulfocompound+reductive agent 1-5%, ooze treatment temp altogether and be: 530 °-600 ℃, the said vanadium thing that contains is V
2O
5, vanadium iron or pure vanadium powder, sulfocompound are K
2S, Na
2S, Na
2SO
3Or Na
2S
2O
3, reductive agent is an aluminium powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89108123 CN1015004B (en) | 1989-10-21 | 1989-10-21 | Low-temp. salt bath vanadium nitrogen sulphur common seeping technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89108123 CN1015004B (en) | 1989-10-21 | 1989-10-21 | Low-temp. salt bath vanadium nitrogen sulphur common seeping technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1041978A CN1041978A (en) | 1990-05-09 |
| CN1015004B true CN1015004B (en) | 1991-12-04 |
Family
ID=4857465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89108123 Expired CN1015004B (en) | 1989-10-21 | 1989-10-21 | Low-temp. salt bath vanadium nitrogen sulphur common seeping technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1015004B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871087B (en) * | 2009-04-21 | 2013-02-13 | 上海江凯金属表面处理技术有限公司 | Salt bath formula for treating high-speed steel air conditioning compressor blade by salt bath nitriding treatment and treatment method |
| CN105331926B (en) * | 2015-11-05 | 2018-03-20 | 广西大学 | N C Cr V RE multicomponent thermochemical treatment materials for 45 steel surface reinforcements |
-
1989
- 1989-10-21 CN CN 89108123 patent/CN1015004B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1041978A (en) | 1990-05-09 |
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| C13 | Decision | ||
| GR02 | Examined patent application | ||
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