CN105039904B - A kind of chromium titanium nitrogen carbon multicomponent diffusion medium and its co-infiltrating method - Google Patents
A kind of chromium titanium nitrogen carbon multicomponent diffusion medium and its co-infiltrating method Download PDFInfo
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Abstract
The invention discloses a kind of chromium titanium nitrogen carbon multicomponent diffusion medium, constituted by sodium carbonate, for the agent of chromium titanium, catalyst, sodium chloride, sodium hydroxide, Zassol, on the basis of the nitrocarburizing salt bath penetration enhancer of improvement, innovatively add metallic element chromium titanium, permeation is bathed by the polynary middle thermohaline of chromium titanium sulphur nitrogen carbon so that workpiece can possess more preferable heat-resisting ability, fatigue performance, decay resistance and stronger hardness.Compared with normative heat treatment technology, thermohaline bathes permeation in use of the present invention, and treatment temperature is low, and soaking time is short, can significantly save, compared with carburizing and quenching, can save more than 50%.Diffusion medium and the co-infiltrating method scope of application of the present invention is very wide, it is adaptable to carbon structural steels, mould steel, the surface treatment of stainless steel.
Description
Technical field
The present invention relates to the process for treating surface of metal material, more particularly to a kind of chromium titanium nitrogen carbon multicomponent diffusion medium and its altogether
Infiltration method.
Background technology
The surface of material and near-surface region control many mechanically and chemically properties of solid, such as friction, abrasion, corrosion
With fracture etc., therefore the performance of material surface is transformed using various process for treating surface, be to ensure die quality and service life
Important step.Current die surface treatment technology has many kinds, and conventional has carburizing, nitriding, carbo-nitriding, sulphur nitrogen carbon to be total to
Ooze, boronising, vanadinizing, TD coating, physical vapour deposition (PVD) etc..Wherein, using it is more be carbo-nitriding.Nitrocarburizing, is in work
The chemical heat treatment process of nitrogen and carbon is penetrated on part surface, and low with treatment temperature, the time is short, is not limited by steel grade and part distorts
The wearability of workpiece, corrosion resistance, fatigue strength can get a promotion after small the advantages of, processing.But, salt bath nitrocarburizing processing
The problem of still there is workpiece heat-resisting ability and poor decay resistance.
The content of the invention
The present invention in view of the deficienciess of the prior art, providing a kind of chromium titanium nitrogen carbon multicomponent diffusion medium and its permeation side
Method.
The technical solution used in the present invention is：
A kind of chromium titanium nitrogen carbon multicomponent diffusion medium, by sodium carbonate, for the agent of chromium titanium, catalyst, sodium chloride, sodium hydroxide, cyanic acid
Sodium is constituted, and the mass percent of each component is respectively sodium carbonate 10-20%, for chromium titanium agent 1-3%, catalyst 0.5-1.5%, cyanogen
Sour sodium 65-80%, sodium hydroxide 1-6%, sodium chloride, surplus；Wherein, the confession chromium titanium agent is powdered form, includes chromium-ferroalloy
With titanium-ferroalloy.
As the further improvement of invention, the confession chromium titanium agent also includes chromium powder, Cr2O3, chromate, in chromite powder
It is at least one.
As the further improvement of invention, the confession chromium titanium agent also includes titanium sponge, titanium valve, titanium chloride, titanium oxide, hydrogen
Change at least one of titanium, ilmenite powder.
As the further improvement of invention, the catalyst is NH4Mixture in Cl and NaF.
As the further improvement of invention, contained siderochrome titanium mass ratio is Fe in the confession chromium titanium agent：Cr：Ti=1：2-5：
1-3。
A kind of co-infiltrating method, comprises the following steps：
The heating fusing of chromium titanium nitrogen carbon multicomponent diffusion medium is first taken, salt bath is formed；
Steel material is put into isothermal holding 0.5-7h in above-mentioned penetration enhancer, material surface formation co-penetration layer；
Take out air cooling, the Steel material after being handled；
The diffusion medium is as described above described in any one.
As the further improvement of invention, described Steel material is any one in carbon structural steels, mould steel, stainless steel
Kind.
As the further improvement of invention, described heating-up temperature is 470-610 DEG C.
As the further improvement of invention, the described isothermal holding time is 0.5-7h.
As the further improvement of invention, described heating fusing and described isothermal holding process are entered in salt bath furnace
Capable.
Beneficial effects of the present invention：
The problem of heat-resisting ability and poor decay resistance that the present invention exists for traditional nitrocarburizing, in improvement
On the basis of nitrocarburizing salt bath penetration enhancer, metallic element chromium titanium is innovatively added, is bathed altogether by the polynary middle thermohaline of chromium titanium nitrogen carbon
Ooze so that workpiece can possess more preferable heat-resisting ability, fatigue performance, decay resistance, stronger hardness and preferably not
It is stained with stickiness energy.Compared with normative heat treatment technology, thermohaline bathes permeation in use of the present invention, and treatment temperature is low, soaking time
It is short, it can significantly save, compared with carburizing and quenching, more than 50% can be saved.Diffusion medium of the present invention and permeation side
The method scope of application is very wide, it is adaptable to carbon structural steels, mould steel, the surface treatment of stainless steel.Using diffusion medium of the present invention
Steel material surface is handled with co-infiltrating method, can be in co-penetration layer of the material surface formation more than 100 μm, co-penetration layer highest
Hardness Hv1.0Up to 1350.
Embodiment
Embodiment 1：
The agent of chromium titanium, 0.5-1.5% catalyst, 65-80% Zassols, 1-6% hydrogen-oxygens are supplied by 10-20% sodium carbonate, 1-3%
Change the uniform mixing of percentage sampling of sodium, surplus sodium chloride, obtain chromium titanium nitrogen carbon multicomponent diffusion medium, pack it is stand-by, wherein
The confession chromium titanium agent is powdered form, comprising chromium-ferroalloy and titanium-ferroalloy, and the confession chromium titanium agent also includes chromium powder, Cr2O3, chromium
At least one of hydrochlorate, chromite powder, the confession chromium titanium agent also include titanium sponge, titanium valve, titanium chloride, titanium oxide, hydrogenation
At least one of titanium, ilmenite powder.The catalyst is NH4Mixture in Cl and NaF.Institute's iron content in the confession chromium titanium agent
Chromium titanium mass ratio is Fe：Cr：Ti=1：2-5：1-3.Take above-mentioned chromium titanium nitrogen carbon multicomponent diffusion medium to add in salt bath furnace, be heated to
470-610 DEG C of fusing, forms salt bath, then Steel material is added insulation 0.5-7h, and material surface formation co-penetration layer then takes out sky
It is cold, the Steel material after being handled.Described Steel material is any one in carbon structural steels, mould steel, stainless steel, for
Different Steel material types, the temperature of heating is different with the time of insulation.
In the present embodiment, the confession chromium titanium agent is ferrochrome, ferro-titanium mixture, and contained siderochrome titanium mass ratio is
Fe：Cr：Ti=1：2：1；The mass percent of each component is Zassol 65%, sodium carbonate 20%, sodium chloride 10%, sodium hydroxide
1%th, for chromium titanium agent 3%, catalyst 1%；Salt bath heating temperature is 520 DEG C, and the metal material of the addition is 20# steel workpieces,
Soaking time is 1h.After being surface-treated using the above method, through measurement, workpiece surface alloying layer thickness is 100 μm, case hardness
Hv1.0=750.
Embodiment 2：
Be the same as Example 1, difference is, mass percent shared by the confession chromium titanium agent is 1%, shared by the sodium chloride
Mass percent is 12%.After being surface-treated using the above method, through measurement, workpiece surface alloying layer thickness is 100 μm, and surface is hard
Spend Hv1.0=550.
Embodiment 3：
Be the same as Example 1, difference is, mass percent shared by the confession chromium titanium agent is 0.1%, the sodium chloride institute
It is 12.9% to account for mass percent.After being surface-treated using the above method, through measurement, workpiece surface alloying layer thickness is 100 μm, table
Surface hardness Hv1.0=450.
Embodiment 4：
Be the same as Example 1, difference is, the confession chromium titanium agent is ferrochrome, ferro-titanium, Cr2O3, titantium hydride, titanium
Iron ore powder mixture, contained siderochrome titanium mass ratio is Fe：Cr：Ti=1：5：2；The mass percent of each component is cyanate
80%th, sodium carbonate 10%, sodium chloride 3.5%, sodium hydroxide 3%, for chromium titanium agent 3%, catalyst 0.5%；Heating-up temperature is 560
DEG C, the metal material for adding processing is H13 mould steel, and soaking time is 6h.After being surface-treated using the above method, through measurement,
Material surface alloying layer thickness is 120 μm, case hardness Hv1.0=1350, anti-wear performance and endurance life performance are greatly improved,
Die life improves 2-4 times.
Embodiment 5：
Be the same as Example 1, difference is, the confession chromium titanium agent is ferrochrome, ferro-titanium, Cr2O3, titantium hydride, titanium
Iron ore powder mixture, contained siderochrome titanium mass ratio is Fe：Cr：Ti=1：2：3；The mass percent of each component is cyanate
69.5%th, sodium carbonate 15%, sodium chloride 7%, sodium hydroxide 6%, for chromium titanium agent 1%, catalyst 1.5%；Heating-up temperature is 500
DEG C, the metal material for adding processing is stainless steel, and soaking time is 0.5h.After being surface-treated using the above method, through measurement, material
It is 100 μm, case hardness Hv to expect surface alloying layer thickness1.0=1000, and anti-wear performance, endurance life performance and non-sticky stickiness
It is able to can greatly improve.
Claims (7)
1. a kind of chromium titanium nitrogen carbon multicomponent diffusion medium, it is characterised in that by sodium carbonate, for the agent of chromium titanium, catalyst, sodium chloride, hydrogen-oxygen
Change sodium, Zassol composition, the mass percent of each component is respectively sodium carbonate 10-20%, for chromium titanium agent 1-3%, catalyst
0.5-1.5%, Zassol 65-80%, sodium hydroxide 1-6%, sodium chloride, surplus；Wherein, the confession chromium titanium agent is powdered form,
Comprising chromium-ferroalloy and titanium-ferroalloy, contained siderochrome titanium mass ratio is Fe in the confession chromium titanium agent：Cr：Ti=1：2-5：1-3,
The catalyst is NH4Cl and NaF mixture.
2. chromium titanium nitrogen carbon multicomponent diffusion medium according to claim 1, it is characterised in that the confession chromium titanium agent also includes chromium
Powder, Cr2O3, chromic salts, at least one of chromite powder.
3. chromium titanium nitrogen carbon multicomponent diffusion medium according to claim 2, it is characterised in that the confession chromium titanium agent also includes sponge
At least one of titanium, titanium valve, titanium chloride, titanium oxide, titantium hydride, ilmenite powder.
4. a kind of co-infiltrating method, it is characterised in that comprise the following steps：
The heating fusing of chromium titanium nitrogen carbon multicomponent diffusion medium is first taken, salt bath is formed；
Steel material is put into isothermal holding 0.5-7h in above-mentioned penetration enhancer, material surface formation co-penetration layer；
Take out air cooling, the Steel material after being handled；
The diffusion medium is as described in claim any one of 1-3.
5. co-infiltrating method according to claim 4, it is characterised in that described Steel material be carbon structural steels, mould steel,
Any one in stainless steel.
6. co-infiltrating method according to claim 4, it is characterised in that described heating-up temperature is 470-610 DEG C.
7. the co-infiltrating method according to claim any one of 4-6, it is characterised in that described heating fusing and described guarantor
Warm processing procedure is carried out in salt bath furnace.
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