CN106756626A - A kind of food the contact bright as silver rod of free cutting austenite stainless steel and its production technology - Google Patents
A kind of food the contact bright as silver rod of free cutting austenite stainless steel and its production technology Download PDFInfo
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- CN106756626A CN106756626A CN201611226049.4A CN201611226049A CN106756626A CN 106756626 A CN106756626 A CN 106756626A CN 201611226049 A CN201611226049 A CN 201611226049A CN 106756626 A CN106756626 A CN 106756626A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2261/00—Machining or cutting being involved
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Abstract
The invention discloses a kind of food contact bright as silver rod of free cutting austenite stainless steel and its production technology, production technology includes dispensing shove charge, melting, continuous casting, Centreless lathe processing, rolling, heat treatment, centerless grinder grinding, migration amount and corrosive nature detection, nondestructive inspection detection packaging.The characteristics of this production technology is, in melting, low melting point (271 DEG C) the volatile bismuth element of vapor pressure high to be added in the liquation of austenitic stainless steel, can increase substantially the rate of recovery of bismuth.The present invention is compared with prior art, the rate of recovery of bismuth improves more than 40%, the technological process of productions more than 75% have been reached to simplify, it is energy-efficient, the content control of Cutting free austenitic stainless steel sulphur is between 0.003% 0.010%, the features such as product quality reaches vacuum metling same quality level, its performance indications reaches and better than state food safety standard and European Union's ROHS command requests, is particularly well-suited to the fields such as medical sanitary apparatus, food machinery, utensils for kitchen ＆ toilet, household electrical appliances, chemical industry, haberdashery and hardware.
Description
Technical field
The present invention relates to metallurgical continuous casting technical field, be related to the bright as silver rod of food contact free cutting austenite stainless steel and its
Production technology, the specifically a kind of contact of low-sulfur the foodstuffs without toxicity bright as silver rod of free cutting austenite stainless steel and its production technology.
Background technology
Free cutting stainless steel refers to the stainless steel with excellent machinability, typically by cutter life, plus
The overall target such as work surface smoothness, cutting pattern, cutter stress and energy consumption evaluates free cutting stainless steel cutting ability
Superior degree.The cutting ability that stainless steel is usually improved by adding the unit such as Cutting free elementary sulfur, lead, selenium main at present, with
The enhancing of people's environmental consciousness and healthy requirement.The poisonous heavy metal element such as lead, selenium is limited in the industrial production
System is used, and smelting process addition lead, selenium can cause serious public hazards, is not allowed with the stainless steel making medical treatment of the heavy metal such as leaded
The electronic products such as health equipment, food machinery, utensils for kitchen ＆ toilet, household electrical appliance.Although element sulphur can significantly improve stainless steel
Cutting ability, but the sulphide inculsion that is formed in stainless steel of element sulphur can reduce the mechanical property and corrosion resistance of stainless steel
Can, it is impossible to ensure that product can reach nickel, chromium, lead, cadmium, the technical requirements of arsenic migration amount of state food safety standard.
Bismuth element is added in austenitic stainless steel can improve its cutting ability, improve processing efficiency, meanwhile, because bismuth
Nuisanceless nontoxicity, bismuth-containing free cutting stainless steel is more easy to meet food, medical product and the environmental standard for increasingly improving
Requirement.But because be directly added into bismuth in the molten bath of steel if boiling point is only 1564 DEG C of by bismuth fusing point very low (271 DEG C), although bismuth
Density larger (at 25 DEG C be 9.75) be easy to sink to molten steel, but the vapour pressure of bismuth is high, and volatility is stronger, causes the rate of recovery very
It is low, typically only 10-15%.
At present, for diameter Ф 12- Ф 25mm according to national bohler standard production austenitic stainless steel bar material, tradition
The technique that generally uses of production for：Electric arc furnaces+intermediate frequency furnace is smelted, pours into ingot casting, the cogging of heating blooming mill, reheats cross-arranging type
Bar semi-finished product, cold drawn, heating solid solution, rolling and straightening, coreless grinding machine corase grind, centreless mill of the mill milling into Ф 15- Ф 27mm
Bed fine grinding, flaw detection, finished product packing.Due to the technique productions long flow path, low production efficiency, many reheating operations, high energy consumption, become a useful person
Rate is low, production cost is high, and production environment is severe, unstable product quality.
The content of the invention
The invention aims to overcome prior art weak point recited above, and a kind of bismuth rate of recovery for providing
Height, the short efficiency high of production procedure, lumber recovery is high, and austenite Cutting free is used in the new low-sulfur foodstuffs without toxicity contact of product quality stabilization
The production technology of the bright as silver bar of stainless steel.
A kind of novel foodstuff the contact bright as silver bar of free cutting austenite stainless steel and its production technology of the present invention,
It has energy-efficient, environmental protection, the characteristics of product finished product rate is high.The product produced has filled up domestic market to food
The blank that contact stainless steel and food-grade free cutting stainless steel are used.
A kind of food contact bright as silver rod of free cutting austenite stainless steel of the present invention, is a kind of low-sulfur foodstuffs without toxicity
The contact bright as silver rod of free cutting austenite stainless steel, by percentage to the quality, contains consisting of composition：
C：0.03-0.07%, S：0.003-0.01%, Cr：18.0-20.0%, Ni：8.0-10.0%, Bi：0.06-
0.26%th, Ca：0.0010-0.0028%, Si：0.30-1.00%, Mn：1.0-1.6%, P：0.020-0.045%, it is balance of
Iron and inevitable impurity.
The low-sulfur foodstuffs without toxicity contact bright as silver rod of free cutting austenite stainless steel of the present invention, wherein：Cd≤
100mg/kg、Pd≤1000mg/kg、Hg≤1000mg/kg。
The low-sulfur foodstuffs without toxicity of the present invention contact bright as silver rod of free cutting austenite stainless steel, Cr therein, Ni,
Pb, Cd, As metal ion are separated out according to China's standard GB/T 9684-2011 (national food safety standard stainless steel products)
Migration amount is：Cr≤0.4mg/dm2、Ni≤0.1mg/dm2、Pb≤0.01mg/dm2、Cd≤0.005mg/dm2、As≤
0.008mg/dm2。
The low-sulfur foodstuffs without toxicity contact bright as silver rod of free cutting austenite stainless steel of the present invention, its production technology, bag
Include following steps：
1) dispensing shove charge：The qualified austenitic stainless steel essence casting material that will have been matched loads small bore horizontal caster；
2) melting：Heating causes that steel temperature is slow and grows steadily to melting, being warmed up to 1580 DEG C with up to white slag that addition is easily cut
Element bismuth is cut, ar blowing refining, slagging-off fine setting alloying component meets secondary ar blowing refining after standard, then be warming up to 1600-1620 DEG C
It is transferred to continuous casting working procedure；
3) continuous casting：Confirm that horizontal casting unit and corollary equipment work well, adjustment crystallizer turnover water pressure, flow,
Open casting throwing, liquid steel temperature, casting speed, frequency of billet withdrawal in control stove；
4) Centreless lathe processing：Turnery processing is carried out by Centreless lathe is sent into after strand rolling and straightening；
5) roll：By step 4) the good continuous casting material of the finishing that obtains passes through the intermediate frequency uniform on-line heating of diathermanous non-oxidation
Afterwards, semi-finished product are precisely rolled into；
6) it is heat-treated：Solution treatment is carried out by way of non-oxidation Controlled Atmosphere Protect roller-bottom type continuous heat, is gone out
It is cold drawn with water-cooled chilling and then pickling, finishing after stove, then Length-fixing cutting；
7) centerless grinder grinding：By step 6) centerless grinder is sent into after the semi-finished product that obtain rolling aligning grinds to form bright as silver rod
Material；
8) migration amount and corrosive nature are detected；
9) nondestructive inspection detection packaging.
Step 1 of the present invention) described in dispensing shove charge, the selected classification of impurity elimination of deoiling for preferably supplying at a fixed location qualified supplier
Stainless steel precision casting material, the burdening calculation requirement and the chemical composition requirement of steel grade smelted according to electromagnetic induction furnace give science and match somebody with somebody
Material, the qualified austenitic stainless steel essence casting material that then will have been matched loads collection melting, electromagnetic induction heating tundish stove, argon oxygen bottom
Blow, inert gas protection, composite refining, the small bore horizontal caster of constant-temperature continuous casting many integration.
Step 2) described in melting, preferably adjust refining furnace heating power and keep steel temperature slowly to grow steadily to fusing, make
Slag, is warming up to 1580 DEG C with up to white slag, adds Cutting free element bismuth, ar blowing refining, and the time is 3-5 minutes, and slagging-off fine setting is closed
Golden composition, takes sample in stove, and C matches somebody with somebody by 0.05%, and carbon sulphur quick analytic instrument tests sample≤0.07%；Si is allocated into by≤1.0%；Mn is pressed
1.5% is allocated into, and Ni is allocated into by 8.2%, and chemistry tests sample >=8.2%, less than when supply 8.2%；Bi is allocated into by 0.10-0.15%,
Chemistry tests sample >=0.11%；Cr is allocated into by 18.16%, and chemistry tests sample >=18.16%, less than when supply 18.16%；S≤
0.01%, P≤0.045%；Meet secondary ar blowing refining 3-5 minutes after above-mentioned standard, then be warming up to 1600-1620 DEG C and be transferred to down
Road horizontal casting operation.
Step 3) described in continuous casting, preferably confirm that horizontal casting unit and corollary equipment work well, crystallizer cooling water
Flow：5.5m3/ h, intake pressure：0.5MPa, discharge pressure：0.1MPa, opens casting throwing, controls liquid steel temperature in stove and exists
1550-1600 DEG C of scope, control casting speed is at 2.0-2.5 ms/min；Frequency of billet withdrawal is at 90-120 beats/min.
Step 4) described in Centreless lathe processing, be the strand rolling and straightening of 2-3 meters of Φ 35- Φ 50mm preferably by fixed length
Feeding Centreless lathe carries out turnery processing afterwards.
Step 5) described in rolling：It is preferred that by step 4) the good continuous casting material of the finishing that obtains passes through the diathermanous non-oxidation of intermediate frequency
Uniform on-line heating is once precisely rolled into the semi-finished product of Ф 15- Ф 27mm to feeding three-roller planetary rolling mill after 1150-1200 DEG C,
930-1000 DEG C of finishing temperature, rolling lengthening coefficient 3-11.
Step 6) described in heat treatment, preferably entered by way of non-oxidation Controlled Atmosphere Protect roller-bottom type continuous heat
Row solution treatment, 1050-1150 DEG C of solid solubility temperature, with water-cooled chilling and then pickling, finishing after coming out of the stove, is cold drawn to Φ 16.35mm,
Scale 2.5m is cut again.
Step 7) described in centerless grinder grinding, preferably by step 6) send into centreless grinding after the semi-finished product that obtain rolling aligning
Bed is ground to the bright as silver bar of Ф 12- Ф 25mm, the diameter deviation of bright as silver bar in the range of 0-0.033mm, surface roughness
≤ 5.0 μm, glacing flatness≤1mm/m.
Step 8) described in migration amount and corrosive nature detection, refer to randomly select ground rod iron, sampling feeding
Neutral salt spray test device does degree of corrosion experiment, corrosion-free after 96 hours, then by GB/T5009.81 standard detections its acetic acid solutions
Nickel, chromium, lead, the content of arsenic cadmium, product quality reach GB9684-2011 national food safety standard (stainless steel products) heavy metal
The requirement of Cr, Ni, Pb, Cd, As migration amount standard limited value：Ni≤0.1mg/dm2、Cr≤0.4mg/dm2、Pb≤0.01mg/dm2、
As≤0.008mg/dm2、Cd≤0.005mg/dm2。
Step 9) described in nondestructive inspection detection packaging, refer to that will reach the bright as silver rod of required precision through centerless grinder processing
Material finished product sends into eddy current testing equipment nondestructive inspection, after checking Surface of Rod Bar flawless defect, is re-fed into ultrasonic examination check rod
Without defects, packaging and storage such as shrinkage porosite, pinprick, hole crackles inside material.
Compared with prior art, the present invention has advantages below:
1st, in melting, melting uses collection melting, electromagnetic induction heating, the bottom blowing of argon oxygen, inert to the present invention when producing
Gas shield, the composite refining tundish stove of horizontal casting many integration；Matched by optimize technique, added using suitable bismuth
It is only molten bath that 1564 DEG C and vapour pressure is high, volatility is stronger bismuth element add steel to measure very low (271 DEG C) boiling point of fusing point
In, the rate of recovery of bismuth is brought up to more than 75% by general 10-15%.
2nd, the technological process of production of the present invention is short, and product finished product rate is high, reaches more than 75%.
3rd, the totally-enclosed non-oxidation Electromagnetic Continuous sensing heating of controlled atmosphere and three-roller planetary are used during present invention rolling
The disposable precisely continuous rolling unit of milling train heavy reduction, realizes zerolling, accurate temperature controlling；Used during solution treatment
Controlled Atmosphere Protect flame enrichment envelope formula protection roller-bottom type continuous heat unit.Three-roller planetary rolling mill automatic controlling level is high, and
And the surface quality of stocking, shape and precision are greatly improved, stocking qualification rate reaches more than 99%, reduces labor
Fatigue resistance and improve labor productivity.
4th, the present invention with new smelting process by it is nuisanceless, nontoxic, without carcinogenic bismuth and calcium constituent, the traditional lead of replacement,
The Cutting free element such as selenium, sulphur, it is to avoid injury of the toxic element such as lead, selenium to human body, simultaneously effective reduces sulphur in stainless steel
Content, and obtained effectively with excellent free cutting property, and the mechanical property and decay resistance of free cutting stainless steel
Raising.The product for obtaining, Cr, Ni, Pb, Cd, As metal ion therein separate out according to China's standard GB/T 9684-
2011 (stainless steel products) heavy metal transformation amounts are：Cr≤0.4mg/dm2、Ni≤0.1mg/dm2、Pb≤0.01mg/dm2、Cd≤
0.005mg/dm2、As≤0.008mg/dm2, reach and better than national food safety standard.
Specific embodiment
With embodiment, the invention will be further described below, but the invention is not limited in these embodiments.
Embodiment 1：
Smelted from following quality percentage composition：C:0.057%, S:0.009%, Cr:18.14%, Ni:
8.18%, Bi:0.11, Ca:0.0018%, Si:0.34%, Mn:1.41%, P:0.032%, also contain<The Cd of 100mg/kg,
<The Pb of 1000mg/kg,<The Hg of 1000mg/kg, remaining is Fe.
The specific technological process of production, step is as follows：
1) dispensing：With essence casting stainless steel, chip, material etc. is returned to for main charge composition, in addition to carbon, silicon, sulphur, close to steel grade
Standard analysis.
2) melting：Adjustment refining furnace heating power keeps steel temperature slowly to grow steadily to fusing, and slag making is warming up to 1580 DEG C
With up to white slag, Cutting free element bismuth, ar blowing refining are added, the time is 3-5 minutes, slagging-off fine setting alloying component takes sample in stove,
C matches somebody with somebody by 0.05%, and carbon sulphur quick analytic instrument tests sample≤0.07%；Si is allocated into by≤1.0%；Mn is allocated into by 1.5%, and Ni is pressed
8.2% allocates into, and chemistry tests sample >=8.2%, less than when supply 8.2%；Bi is allocated into by 0.10-0.15%, chemistry test sample >=
0.11%；Cr is allocated into by 18.16%, and chemistry tests sample >=18.16%, less than when supply 18.16%；S≤0.01%, P≤
0.045%；Meet secondary ar blowing refining 3-5 minutes after above-mentioned standard, then be warming up to 1600-1620 DEG C and be transferred to lower road horizontal casting
Operation；
3) continuous casting：In production process, liquid steel temperature is controlled in stove in the range of 1580-1590 DEG C, crystallizer cooling water
Flow：5.5m3/ h, intake pressure：0.5MPa, discharge pressure：0.1MPa, controls casting speed in 2-2.5 ms/min of scope
It is interior, 110 beats/min of frequency of billet withdrawal；
4) Centreless lathe processing：By Φ 35mm, 2.2M rods long feeding Centreless lathe be processed as the half of 31.6 ± 0.1mm of Φ into
Product, it is stand-by；
5) roll：Three-roller planetary is sent into after the continuous casting billet for stripping off the skin is heated uniformly into 1150 DEG C by the diathermanous non-oxidation of intermediate frequency
The stocking for being rolled into Φ 18mm*6.5m of milling train heavy reduction；
6) heat treatment or solid solution：Stocking is carried out into solid solution by way of with protective atmosphere roller-bottom type continuous heat, Gu
1050-1150 DEG C of solubility temperature, with water-cooled chilling and then pickling, finishing after coming out of the stove, is cold drawn to Φ 16.35mm, then scale 2.5m enters
Row cutting；
7) centerless grinder grinding：After the good blank alignment of drawing Length-fixing cutting, feeding centerless grinder grinding reaches directly
Φ 16mm, diameter deviation in the range of 0--0.02mm, surface roughness≤5.0 μm, glacing flatness≤1mm/m；
8) migration amount and corrosive nature are detected：Its composition of finished product detection is C:0.038%, S:0.007%, Cr:18.15%
Ni:8.20%, Bi:0.114%, Ca:0.001%, Mn:1.42%, Si:0.39, P:0.038%, content of beary metal Cd<2mg/
kg、Pb<2mg/kg、Hg<2mg/kg, remaining is Fe.Through 96 hours corrosion-free phenomenons of neutral salt spray test, marked according to country of China
Quasi- GB9684-2011 (national food safety standard stainless steel products) requires that the alloy presses GB/T5009.81 standard testing results
It is Cr:0.017mg/dm2, Ni:0.017mg/dm2, Pb:0.002mg/dm2, Cd:0.002mg/dm2, As<0.008mg/dm2；
9) nondestructive inspection detection packaging：The bright as silver rod product that required precision is reached through centerless grinder processing is sent into vortex
Defectoscope nondestructive inspection, after checking Surface of Rod Bar flawless defect, is re-fed into inside ultrasonic examination inspection bar without shrinkage porosite, pin
The defects, packaging and storage such as eye, hole crackle.
Embodiment 2
Production stage is same as Example 1, and difference is to be smelted from following quality percentage composition：C:
0.05%, S:0.01%, Cr:18.19%, Ni:8.13%, Bi:0.116%, Ca:0.001%, Si:0.46%, Mn:
1.31%, P:0.03%, also contain<The Cd of 2mg/kg,<The Pb of 2mg/kg,<The Hg of 2mg/kg, remaining is Fe.Pressed in the smelting phase
Above-mentioned composition control content and addition, products obtained therefrom performance are substantially the same manner as Example 1.
Embodiment 3
Production stage is same as Example 1, and difference is to be smelted from following quality percentage composition：C:
0.038%, S:0.007%, Cr:18.20%, Ni:8.20%, Bi:0.114%, Ca:0.001%, Si:0.46%, Mn:
1.42%, P:0.038%, also contain<The Cd of 2mg/kg,<The Pb of 2mg/kg,<The Hg of 2mg/kg, remaining is Fe.In the phase of smelting
By above-mentioned composition control content and addition, products obtained therefrom performance is substantially the same manner as Example 1.
Claims (10)
1. a kind of food contact bright as silver rod of free cutting austenite stainless steel, it is characterised in that by percentage to the quality, containing with
Lower constituent：
C：0.03-0.07%,
S：0.003-0.01%,
Cr：18.0-20.0%,
Ni：8.0-10.0%,
Bi：0.06-0.26%,
Ca：0.0010-0.0028%,
Si：0.30-1.00%,
Mn：1.0-1.6%,
P：0.020-0.045%,
Balance of iron and inevitable impurity.
2. a kind of food according to claim 1 is contacted and uses the bright as silver rod of free cutting austenite stainless steel, it is characterised in that with
Mass percent meter, contains consisting of composition：Cd≤100mg/kg、Pd≤1000mg/kg、Hg≤1000mg/kg.
3. a kind of food according to claim 1 and 2 is contacted and uses the bright as silver rod of free cutting austenite stainless steel, and its feature exists
In：The described food contact bright as silver rod of free cutting austenite stainless steel, Cr, Ni, Pb, Cd, As metal ion therein is separated out
It is according to the migration amount of China's standard GB/T 9684-2011：Cr≤0.4mg/dm2、Ni≤0.1mg/dm2、Pb≤0.01mg/
dm2、Cd≤0.005mg/dm2、As≤0.008mg/dm2。
4. a kind of food contact production technology of the bright as silver rod of free cutting austenite stainless steel, is described in claim 1 or 2 or 3
The food contact production technology of the bright as silver rod of free cutting austenite stainless steel, it is characterised in that comprise the following steps：
1) dispensing shove charge：The qualified austenitic stainless steel essence casting material that will have been matched loads small bore horizontal caster；
2) melting：Heating causes that steel temperature is slow and grows steadily to melting, being warmed up to 1580 DEG C with up to white slag that addition Cutting free is first
Plain bismuth, ar blowing refining, slagging-off fine setting alloying component meets secondary ar blowing refining after standard, then is warming up to 1600-1620 DEG C and is transferred to
Continuous casting working procedure；
3) continuous casting：Confirm that horizontal casting unit and corollary equipment work well, adjustment crystallizer turnover water pressure, flow, Qi Zhu
Throwing, liquid steel temperature, casting speed, frequency of billet withdrawal in control stove；
4) Centreless lathe processing：Turnery processing is carried out by Centreless lathe is sent into after strand rolling and straightening；
5) roll：By step 4) the good continuous casting material of the finishing that obtains by after the intermediate frequency uniform on-line heating of diathermanous non-oxidation, essence
Standard is rolled into semi-finished product；
6) it is heat-treated：Solution treatment is carried out by way of non-oxidation Controlled Atmosphere Protect roller-bottom type continuous heat, after coming out of the stove
It is cold drawn with water-cooled chilling and then pickling, finishing, then Length-fixing cutting；
7) centerless grinder grinding：By step 6) centerless grinder is sent into after the semi-finished product that obtain rolling aligning grinds to form bright as silver bar；
8) migration amount and corrosive nature are detected；
9) nondestructive inspection detection packaging.
5. a kind of food according to claim 1 contacts the production technology for using the bright as silver rod of free cutting austenite stainless steel, its
It is characterised by：Step 2) described in melting, refer to that adjustment refining furnace heating power keeps steel temperature slowly to grow steadily to fusing, make
Slag, is warming up to 1580 DEG C with up to white slag, adds Cutting free element bismuth, ar blowing refining, and the time is 3-5 minutes, and slagging-off fine setting is closed
Golden composition, takes sample in stove, and C matches somebody with somebody by 0.05%, and carbon sulphur quick analytic instrument tests sample≤0.07%；Si is allocated into by≤1.0%；Mn is pressed
1.5% is allocated into, and Ni is allocated into by 8.2%, and chemistry tests sample >=8.2%, less than when supply 8.2%；Bi is allocated into by 0.10-0.15%,
Chemistry tests sample >=0.11%；Cr is allocated into by 18.16%, and chemistry tests sample >=18.16%, less than when supply 18.16%；S≤
0.01%, P≤0.045%；Meet secondary ar blowing refining 3-5 minutes after above-mentioned standard, then be warming up to the 1600-1620 DEG C of company of being transferred to
Foundry work sequence.
6. a kind of food according to claim 1 contacts the production technology for using the bright as silver rod of free cutting austenite stainless steel, its
It is characterised by：Step 3) described in continuous casting, refer to confirm that horizontal casting unit and corollary equipment work well, crystallizer cooling water
Flow：5.5m3/ h, intake pressure：0.5MPa, discharge pressure：0.1MPa, opens casting throwing, controls liquid steel temperature in stove and exists
1550-1600 DEG C of scope, control casting speed is at 2.0-2.5 ms/min；Frequency of billet withdrawal is at 90-120 beats/min.
7. a kind of food according to claim 1 contacts the production technology for using the bright as silver rod of free cutting austenite stainless steel, its
It is characterised by：Step 4) described in Centreless lathe processing, it by fixed length is the strand rolling and straightening of 2-3 meters of Φ 35- Φ 50mm to be
Feeding Centreless lathe carries out turnery processing afterwards.
8. a kind of food according to claim 1 contacts the production technology for using the bright as silver rod of free cutting austenite stainless steel, its
It is characterised by：Step 5) described in rolling：It is by step 4) the good continuous casting material of the finishing that obtains passes through the diathermanous non-oxidation of intermediate frequency
Uniform on-line heating is once precisely rolled into the semi-finished product of Ф 15- Ф 27mm to feeding three-roller planetary rolling mill after 1150-1200 DEG C,
930-1000 DEG C of finishing temperature, rolling lengthening coefficient 3-11.
9. a kind of food according to claim 1 contacts the production technology for using the bright as silver rod of free cutting austenite stainless steel, its
It is characterised by：Step 6) described in heat treatment, be to be entered by way of non-oxidation Controlled Atmosphere Protect roller-bottom type continuous heat
Row solution treatment, 1050-1150 DEG C of solid solubility temperature, with water-cooled chilling and then pickling, finishing after coming out of the stove, is cold drawn to Φ 16.35mm,
Scale 2.5m is cut again.
10. a kind of food according to claim 1 contacts the production technology for using the bright as silver rod of free cutting austenite stainless steel, its
It is characterised by：Step 7) described in centerless grinder grinding, be by step 6) send into centreless grinding after the semi-finished product that obtain rolling aligning
Bed is ground to the bright as silver bar of Ф 12- Ф 25mm, the diameter deviation of bright as silver bar in the range of 0-0.033mm, surface roughness
≤ 5.0 μm, glacing flatness≤1mm/m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109825770A (en) * | 2019-03-29 | 2019-05-31 | 宝钢特钢长材有限公司 | A kind of sulfur-bearing bismuth-containing free cutting stainless steel and preparation method thereof |
| CN110453057A (en) * | 2019-09-04 | 2019-11-15 | 浙江晋椿精密工业有限公司 | A kind of high-strength simple-cutting polish stick |
| CN111495984A (en) * | 2020-05-10 | 2020-08-07 | 江苏联峰实业有限公司 | Production method of reducing round bar rolled steel |
| CN112813336A (en) * | 2021-01-28 | 2021-05-18 | 苏州金立鑫特材科技有限公司 | Method for processing SUS303 steel for automobile starting system |
| CN113235006A (en) * | 2021-05-13 | 2021-08-10 | 山东工业职业学院 | Method for producing low-carbon austenitic stainless steel bar by reducing load of rolling mill |
| CN115464341A (en) * | 2022-09-23 | 2022-12-13 | 南京钢铁股份有限公司 | Method for machining free-cutting round steel with silvery bright surface |
| CN116497290A (en) * | 2023-04-26 | 2023-07-28 | 江苏三鑫特殊金属材料股份有限公司 | Stainless steel material with good machinability and cutting destructiveness |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1772942A (en) * | 2005-09-12 | 2006-05-17 | 钢铁研究总院 | Nickel-saving RE-containing austenitic stainless steel and its prepn |
| CN101275208A (en) * | 2007-03-31 | 2008-10-01 | 大同特殊钢株式会社 | Austenitic free-cutting stainless steel |
| CN101829889A (en) * | 2010-04-30 | 2010-09-15 | 钟长林 | Production process of austenitic stainless steel bar by short-process continuous casting and rolling |
| JP2015212418A (en) * | 2015-05-14 | 2015-11-26 | 国立研究開発法人物質・材料研究機構 | High strength nonmagnetic austenitic stainless steel |
-
2016
- 2016-12-27 CN CN201611226049.4A patent/CN106756626A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1772942A (en) * | 2005-09-12 | 2006-05-17 | 钢铁研究总院 | Nickel-saving RE-containing austenitic stainless steel and its prepn |
| CN101275208A (en) * | 2007-03-31 | 2008-10-01 | 大同特殊钢株式会社 | Austenitic free-cutting stainless steel |
| CN101829889A (en) * | 2010-04-30 | 2010-09-15 | 钟长林 | Production process of austenitic stainless steel bar by short-process continuous casting and rolling |
| JP2015212418A (en) * | 2015-05-14 | 2015-11-26 | 国立研究開発法人物質・材料研究機構 | High strength nonmagnetic austenitic stainless steel |
Non-Patent Citations (1)
| Title |
|---|
| 刘家发等: "《焊工手册 手工焊接与切割》", 30 December 2001, 机械工业出版社 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109825770A (en) * | 2019-03-29 | 2019-05-31 | 宝钢特钢长材有限公司 | A kind of sulfur-bearing bismuth-containing free cutting stainless steel and preparation method thereof |
| CN110453057A (en) * | 2019-09-04 | 2019-11-15 | 浙江晋椿精密工业有限公司 | A kind of high-strength simple-cutting polish stick |
| CN111495984A (en) * | 2020-05-10 | 2020-08-07 | 江苏联峰实业有限公司 | Production method of reducing round bar rolled steel |
| CN112813336A (en) * | 2021-01-28 | 2021-05-18 | 苏州金立鑫特材科技有限公司 | Method for processing SUS303 steel for automobile starting system |
| CN113235006A (en) * | 2021-05-13 | 2021-08-10 | 山东工业职业学院 | Method for producing low-carbon austenitic stainless steel bar by reducing load of rolling mill |
| CN115464341A (en) * | 2022-09-23 | 2022-12-13 | 南京钢铁股份有限公司 | Method for machining free-cutting round steel with silvery bright surface |
| CN116497290A (en) * | 2023-04-26 | 2023-07-28 | 江苏三鑫特殊金属材料股份有限公司 | Stainless steel material with good machinability and cutting destructiveness |
| CN116497290B (en) * | 2023-04-26 | 2023-11-07 | 江苏三鑫特殊金属材料股份有限公司 | Stainless steel material with good machinability and cutting destructiveness |
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