CN1031001C - Hardening agent of water-soluble condensed saccharides - Google Patents
Hardening agent of water-soluble condensed saccharides Download PDFInfo
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- CN1031001C CN1031001C CN 93100410 CN93100410A CN1031001C CN 1031001 C CN1031001 C CN 1031001C CN 93100410 CN93100410 CN 93100410 CN 93100410 A CN93100410 A CN 93100410A CN 1031001 C CN1031001 C CN 1031001C
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Abstract
The present invention belongs to a metal heat processing quenching medium which relates to a water-solubility quenching medium containing concentrated saccharide. The present invention adopts carboxymethyl cellulose sodium salt; firstly, concentrated diacetate sodium base hexose is manufactured by chemical processing; then, a coordination compound is formed by the concentrated diacetate sodium base hexose and a high aminated substance and dissolved in water in an ion state. The quenching medium has specific cooling effect on workpieces, and the cooling speed at a martensite stable area can reach 800 to 1000 DEG C /s; the thermodynamics stress of the workpieces is larger than other organization stresses. The present invention has the advantages of preferable hardenability, small deformation degree, no crack, no toxin, no smell, no combustion, no explosion and low price, and can not decay and deteriorate after being used for a long time. The present invention can be widely used for the integration quenching of various kinds of alloy steel, carbon steel and cast iron.
Description
The invention belongs to the metal heat treatmet quenching medium, particularly a kind of quenching medium that contains the carbohydrate that contracts.
For make after heat treatment metal and the physicals of alloy can reach necessary requirement, people are studying various quenching mediums always, wherein the research of water-soluble quenching agent has had very big development, multiple water-soluble organic polymer has been proposed so far as the liquid extract agent, shortcomings such as the quenching character of the approaching oil of these water-soluble organic polymers has but avoided oily liquid extract easily to catch fire, smell is big, but in use still there is certain problem, though wherein polyvinyl alcohol is cheap, but easily corrupt, easily aging, need often to change hardening liquid; Sodium polyacrylate needs the biliquid cooling, so complicated operation is wayward; Polyvinylpyrrolidone easily sticks to workpiece surface when using as quenchant, is difficult to clean; When sodium polyacrylate and polyvinylpyrrolidone use, the cold stage of film all is to form steam film at workpiece surface, intensity is lower, characteristic time is short, work-piece cools is after the characteristic time, heat exchange amount only is 30～40%, workpiece surface to pressure inside and workpiece inside to the surface tension imbalance, it is big deflection to occur, or tearing tendency is arranged, Ju ethyl oxazoline class (European patent 85304444.4) though and the quenching medium of polyether structure have working concentration low, good stability, advantages such as the workpiece deformation amount is little, but scent of and price are more expensive are 3～4 times of oil price lattice.
The objective of the invention is to propose a kind of new metal heat treatmet quenching medium, it has special cooling effect to workpiece, and hardening capacity is good and even, thereby improve the physicals of quenching metal, simultaneously nonpoisonous and tasteless, do not fire not quick-fried, no chemical corrosion effect, cheap, use range is wide.
Hardening agent of water-soluble condensed saccharides of the present invention (SST) also by sodium carboxymethyl-cellulose through chemical treatment, on each unit glycan molecule, plus thirty the son sodium-acetate, obtain the carboxymethyl cellulose disodium salt, form the coordination compound two sodium-acetate base hexose high amides that contract with high amide again then, water-soluble with ionic state, negatively charged ion is macromolecular load transfer complex compound, and its structural formula is:
Eh-high amide (hexamethylenetetramine) in the formula
The h-ligancy equals 2
0, 2
1, 2
2
The condensation number of the former natural cellulose of n-.
The number-average molecular weight of the high amine network of two sodium-acetate bases hexose is 4～50,000 carbosilane units.
When ligancy is 2
1The time, be called SST101, be applicable to the integral quenching of steel alloy: when ligancy is 2
0The time, be called the hard surfacing that SST201 is used for carbon steel and steel alloy; When ligancy is 2
2The time, be called SST301, be used for the integral quenching of carbon steel and cast iron.
The production technique of hardening agent of water-soluble condensed saccharides of the present invention is:
One, produces CMC2Na by sodium carboxymethyl-cellulose CMCNa
(1) principles of chemistry
(CMCNa) alkalescence (CMCNa)
Sodium chloroacetate (CMC2Na)
(2) ratio of components (branch subfraction)
CMCNa?????????????????????12～13％
Mono Chloro Acetic Acid 15～16%
Solid caustic soda 30～31%
Ethanol 4l～42%
(3) earlier solid caustic soda is become 30～40% solution with water dissolution by last proportioning, add ethanol and CMCNa batch mixing 40～60min in special-purpose agitator and drop into Mono Chloro Acetic Acid restir 40～60min, ageing 6～8h after scouring is refining.
(4) synthetic CMC2Na substitution value must be greater than 1.5, are washed till chloride with 60～70% alcohol again and are:
SST101 is less than 10%
SST201 is less than 1.0%
Two, dissolving, complexing
(1)SST101
Ratio of components (branch subfraction)
CMC2Na????????????????15～20％
H promotor (six methyne acid) 65～70%
Sodium Nitrite 15～20%
Be suitable for quenching technology concentration by said ratio with water-soluble one-tenth and again pH transferred to 9.5～10, the middle 500ml～700mlTS-809 biocide that adds per ton.
(2)SST201
Ratio of components (branch subfraction)
CMC2Na：30～35％
H promotor: 70～75%
With water-soluble one-tenth quenching technology concentration, pH is transferred to 9.5～10, the TS-801 defoamer 300ml～400ml that adds per ton, TS-809 biocide 500ml～700ml by above-mentioned proportioning.
(3) SST301 transfers to h=2 with the ligancy of En
2
Through dissolving allotment figure place, obtain the high amine network of two sodium-acetate bases hexose thus, its structure is:
The present invention's carbohydrate quenching medium that contracts and since its chemical structure be two sodium-acetate base hexoses with high amine complexing, form the load transfer complex compound, in the temperature difference heat electric field, molecule generation orientation movement can form ionic membrane around workpiece, ionic concn is the workpiece direction dorsad, thin gradually, therefore have good thermal diffusivity and thermal conductivity, thereby reduce the representative temperature of work-piece cools, increase characteristic cooling time, in the cold stage of film, heat exchange amount reaches 70～75%.
Contract another characteristics of carbohydrate quenching medium of the present invention are that it has special cooling effect to workpiece, promptly in the martensite stable region, when workpiece drops to 125 ℃ by 320 ℃, cold section time step of this quenching medium boiling only is 0.1～0.2 second, speed of cooling reaches 800～1000 ℃/S, the supercool peak value appears after 320 ℃ of temperature, make workpiece surface shrink produce the tension force on the sensing surface that the stress of inside is produced greater than the phase transformation of workpiece inside, thereby workpiece can be obtained hardening capacity preferably, obtain higher hardness and less deflection, do not ftracture.Life-time service is not putrid and deteriorated, and is nonpoisonous and tasteless, do not burn, and do not explode, cheap, can be widely used in the integral quenching of various steel alloys, carbon steel, cast iron.
Embodiment:
One, 65Mn hardens and hardening capacity in SST101, water, oil
Sample is drawn materials: Φ 14 spring wires
Specimen size: Φ 14 * 52
Treatment process: survey hardness after the central zone hardness of discontinuity surface and the tempering in 820 ℃ 14 '+390 ℃ 50 ' back test of quenching.Test-results sees Table one.
The general requirement of spring: back HRC＞60 of quenching, HRC42 after the tempering～50.
As can be seen from Table I, oil (N
32) quenching has two not through hardening in four, the back hardness of quenching all is lower than HRC60, and average hardness is lower than the lower value of requirement after the tempering; Shrend through hardening hardenability meets the demands, but the crackle tendency is arranged; All meet the requirements with 8 hardening capacity of SST101 quenching, hardenability and crackle tendency.
Two, 40Cr deformation test
The sample state: forging is unannealed
Sample quantities: 12
Treatment process: 860 ℃ of 12 ' design temperature shove charges, in SST101, water, N
32Oil quenching is measured quench front and back opening size and quenching hardness, observes the crackle situation.Test-results sees Table
Table two 40Cr average deformation, relative deformation and average hardness
| Quenchant | Homogeneous deformation (mm) | Relative deformation | Average hardness (HRC) |
| SST101 | ?+0.378 | ???1.46 | ????55.8 |
| ?N 22Oil | ?+0.259 | ???1.0 | ????51.1 |
| Water | ?+0.439 | ???1.69 | ????55.1 |
Table one 65Mn is at SST101, water, and the luring property of hardening in the oil is relatively
| Quenchant | Specimen coding | Hardness behind the quench (HRC) | The crackle situation | Temper number (HRC) | Back hardness mean value quenches | Temper number mean value |
| N 32 | ????1 | ?56????56????56????57 | Do not have | ????47.5??46.5??43 | ??49.6 | ???41 |
| ????2 | ?56????54????56????57 | Do not have | ????43.5??43.5??43.8 | |||
| ????3 | ?44????48????55????52 | Do not have | ????40.5??42.5??42 | |||
| ????4 | ?38????35????36????36 | Do not have | ????35????32????33 | |||
| Water | ????5 | ?66?????65.5?65.5??65.5 | ????49????50.5??47 | ??64.7 | ??46.6 | |
| ????6 | ?61?????64.5?65.5??61.5 | Split | ????43????43????45.5 | |||
| ????7 | ?64.5??65????65????65.5 | ????45.5??45????44.5 | ||||
| ????8 | ?65????65????64????65.5 | ????48.5??49????49 | ||||
| ?SST ?101 | ????9 | ?64.5??65.5??65????65.5 | Do not have | ????48????48????48.5 | ???64 | ??48.2 |
| ????10 | ?64????65????64????65 | Do not have | ????45.8??46????46 | |||
| ????11 | ?65????63.5?65.5???64.1 | Do not have | ????49????50????50 | |||
| ????12 | ?64????65.5?63.5???65 | Do not have | ????49????48????49 | |||
| ????13 | ?65????65????63????63 | Do not have | ????48.5??48.5??49.5 | |||
| ????14 | ?63????63.5??62????62.5 | Do not have | ????47????48????48 | |||
| ????15 | ?63????65????65????65 | Do not have | ????48????49????48 | |||
| ????16 | ???62.5?63.5?63.5??62.5 | Do not have | ????48.5??49????49 |
Claims (2)
1. hardening agent of water-soluble condensed saccharides is characterized in that the molecular structural formula of quenching medium is:
En is a high amide in the formula, and h is a ligancy, equals 2
0, 2
1, 2
2, n is the condensation number of former natural cellulose, the high amine network of the two sodium-acetate bases number-average molecular weight of sugar is 4-5 ten thousand carbosilane units.
2. the production technique of a hardening agent of water-soluble condensed saccharides, it is characterized in that by a minute subfraction sodium carboxymethyl-cellulose (CMCNa) 12～13%, Mono Chloro Acetic Acid 15～16%, solid caustic soda 30～31%, ethanol 41～42% proportionings, earlier solid caustic soda is become 30～40% solution with water dissolution, add ethanol and CMCNa batch mixing 40～60 minutes in special-purpose agitator, dropped into the Mono Chloro Acetic Acid restir 40～60 minutes, 6～8 hours after scouring of ageing are refining, again must be greater than 1.5 thick CMC2Na with substitution value, being washed till muriate with 60～70% alcohol is: SST1010～10%, SST2010～1.0%, the complexing of the figure place of dissolving allotment at last, by dividing subfraction proportioning, SST101:CMC2Na15～20%, six methyne acid 65～70%, Sodium Nitrite 15～20%SST201:CMC2Na30～35%, six methyne acid 70～75%, the SST301 ligancy transfers to h=2
2Be diluted to quenching technology concentration with water, pH transfers to 9.5～10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93100410 CN1031001C (en) | 1993-01-29 | 1993-01-29 | Hardening agent of water-soluble condensed saccharides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93100410 CN1031001C (en) | 1993-01-29 | 1993-01-29 | Hardening agent of water-soluble condensed saccharides |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1090333A CN1090333A (en) | 1994-08-03 |
| CN1031001C true CN1031001C (en) | 1996-02-14 |
Family
ID=4983004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93100410 Expired - Fee Related CN1031001C (en) | 1993-01-29 | 1993-01-29 | Hardening agent of water-soluble condensed saccharides |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031001C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017127497A1 (en) * | 2017-11-21 | 2019-05-23 | Sms Group Gmbh | Process for the production of multiphase steels by means of ionic liquids |
-
1993
- 1993-01-29 CN CN 93100410 patent/CN1031001C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1090333A (en) | 1994-08-03 |
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