CN105108114B - The method that stress is eliminated after duplex metal composite lining board casting - Google Patents
The method that stress is eliminated after duplex metal composite lining board casting Download PDFInfo
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- CN105108114B CN105108114B CN201510594259.8A CN201510594259A CN105108114B CN 105108114 B CN105108114 B CN 105108114B CN 201510594259 A CN201510594259 A CN 201510594259A CN 105108114 B CN105108114 B CN 105108114B
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- 238000005266 casting Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000002905 metal composite material Substances 0.000 title claims abstract description 13
- 238000000465 moulding Methods 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 238000005496 tempering Methods 0.000 claims abstract description 13
- 238000009413 insulation Methods 0.000 claims abstract description 10
- 230000000630 rising effect Effects 0.000 claims abstract description 10
- 230000036760 body temperature Effects 0.000 claims abstract description 5
- 238000005498 polishing Methods 0.000 claims abstract description 5
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 8
- 239000000788 chromium alloy Substances 0.000 claims description 8
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000011651 chromium Substances 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
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Abstract
The method that stress is eliminated after duplex metal composite lining board casting, comprises the following steps：1）, insulation：After casting terminates, the molding box after type will be filled and be deposited into a dry region, it is desirable to which molding box is closely packed together with molding box, or molding box is covered using case cover and be incubated, the cooling velocity of casting in extension molding box；2）, open form case：Before open form case, rising head steel body temperature is first measured with temperature measurer, and after casting 24 hours, or rising head steel body is when being not more than 50 °, you can casting is concentrated after open form case, open form case and stacked, after natural cooling, carries out arrangement polishing；3）, heat treatment：First time tempering is carried out after being quenched to liner plate, is tempered every carrying out second to liner plate after 4 ~ 6h.Present invention stress that is easy to operate, effectively eliminating liner plate, improves the service life of liner plate, reduces use cost.
Description
Technical field
The present invention relates to the method that stress is eliminated behind casting field, more particularly to duplex metal composite lining board casting.
Background technology
Duplex metal composite lining board is the substitute of manganese steel, alloy steel material, is a kind of polynary several alloy steel linings of high carbon and chromium
Plate, its body tissue has higher initial hardness based on martensite, and its working face is high-chromium alloy cast-iron, with a relatively high
Hardness（HRC≥58-60）, non-working surface is mild steel, use complex technique by high-chromium alloy cast-iron and mild steel melting for
One, makes that the entirety of liner plate is wear-resistant, toughness reaches optimum state, and solving can not get both between casting hardness and toughness
The problem of, it is applied to all types of ball mills.
Because equipment is using producer's pursuit ore ore grinding industrialization, benefit, in ore dressing process, by the abrading-ball of ball mill
It is changed to Gao Ge steel ball（More than HRC50）, the loss of abrading-ball is reduced first, and grinding efficiency is improved, but shorten ball mill
The service life of liner plate.After traditional moulding, smelting, molten steel forming, meet after 3-4h, sand removal of unpacking, now due to composite lining
Plate working face is high carbon alloy cast iron, and the material phosphorus content height causes steel body cooling velocity slow, and casting is cold at normal temperatures after unpacking
But（General rear surface temperature of unpacking is at 400-450 °, and the core temperature of casting is at 600-700 °）, cool time, which exceedes, casts
Part more than 3 times of cooling velocity in molding box, cause casting body interior stress to greatly increase.Casting internal-external temperature difference drop is big, steel
Liquid shrinks inconsistent, will produce shrinkage porosite and unnecessary fine crack in the inner core of workpiece, this defect is again by follow-up
Heat treatment is indelible.This kind of product is used at the scene, and working face is due to by high chrome pellet impact and vibrations, in liner plate
The stress or fine crack that portion is present are released, and face crack, chip off-falling phenomenon just occurs in very short time, greatly shortens and uses
Life-span.Duplex metal composite lining board has been used widely through application in a few years on low Cr grinding balls grinding machine.But in high chromium mill
On ball mill, there is not more preferable use case yet.Therefore, it is to carve not to seek suitable ball grinding machine lining board on high-Cr grinding balls grinding machine
Hold slow thing.
The content of the invention
It is an object of the invention to provide the method that stress is eliminated after a kind of casting of duplex metal composite lining board, this method operation side
Just the stress of liner plate, can be effectively eliminated, the service life of liner plate is improved, use cost is reduced.
What the present invention was realized in：The method that stress is eliminated after duplex metal composite lining board casting, duplex metal composite lining board bag
High-chromium alloy layer and low carbon steel layer are included, the chemical composition of described high-chromium alloy is by weight percentage：C 2.2 ~ 3.5%, Cr12
~ 18%, Mn 1.5 ~ 2.0%, Mo 0.5 ~ 1.0%, Ni 0.5%, Cu 0.5%, Si 1.0 ~ 1.5%, S≤0.1, P≤0.1, Ac
≤ 0.05, remaining is Fe；It is characterized in that：Comprise the following steps：1）, be incubated after casting：After casting terminates, it will fill after type
Molding box is deposited into a dry region, it is desirable to which molding box is closely packed together with molding box, or use case cover covers molding box and is incubated,
Extend the cooling velocity of casting in molding box；
2）, open form case：Before open form case, rising head steel body temperature is first measured with temperature measurer, after casting 24 hours, or rising head steel
Casting is concentrated when body is not more than 50 °, you can open form case, after open form case and stacked, after natural cooling, arrangement polishing is carried out；
3）, heat treatment：First time tempering is carried out after being quenched to liner plate, is tempered every carrying out second to liner plate after 4 ~ 6h.
The step 3）Middle quenching process is：Liner plate is heated to 180 ~ 220 DEG C, insulation 1 with 200 DEG C/h heating rate
After ~ 1.5h, equally it is heated to 200 DEG C/h heating rate after 350 ~ 400 DEG C, 1.5 ~ 2h of insulation, with 200 DEG C/h heating speed
Rate is heated to 600 ~ 650 DEG C, then is heated to 1000 DEG C with 140 ~ 160 DEG C/h heating rate, and surface is air-cooled to after being incubated 3 ~ 4h
Temperature is 230 ~ 250 DEG C.
The step 3）First time tempering process is：It is 230 ~ 250 DEG C of liner plate shove charge with 200 DEG C/h liters by surface temperature
Warm speed is heated to 450 ~ 480 DEG C, is incubated 1.5 ~ 2h.
The step 3）Second of tempering process be：Liner plate is heated to 350 ~ 400 DEG C, guarantor with 200 DEG C/h heating rates
1.5 ~ 2h of temperature, cools to normal temperature with the furnace and comes out of the stove.
Present invention stress that is easy to operate, effectively eliminating liner plate, improves the service life of liner plate, reduces and use into
This.
Embodiment
The method that stress is eliminated after duplex metal composite lining board casting, duplex metal composite lining board includes high-chromium alloy layer and mild steel
Layer, the chemical composition of described high-chromium alloy is by weight percentage：C 2.2 ~ 3.5%, Cr12 ~ 18%, Mn 1.5 ~ 2.0%, Mo
0.5 ~ 1.0%, Ni 0.5%, Cu 0.5%, Si 1.0 ~ 1.5%, S≤0.1, P≤0.1, Ac≤0.05, remaining is Fe；It is special
Levy and be：Comprise the following steps：1）, be incubated after casting：After casting terminates, the molding box after type will be filled and be deposited into a dry area
Domain, it is desirable to which molding box is closely packed together with molding box, or use case cover cover molding box and are incubated, the cooling speed of casting in extension molding box
Degree；
2）, open form case：Before open form case, rising head steel body temperature is first measured with temperature measurer, after casting 24 hours, or rising head steel
Casting is concentrated when body is not more than 50 °, you can open form case, after open form case and stacked, after natural cooling, arrangement polishing is carried out；
3）, heat treatment：First time tempering is carried out after being quenched to liner plate, is tempered every carrying out second to liner plate after 4 ~ 6h.
The step 3）Middle quenching process is：Liner plate is heated to 180 ~ 220 DEG C, insulation 1 with 200 DEG C/h heating rate
After ~ 1.5h, equally it is heated to 200 DEG C/h heating rate after 350 ~ 400 DEG C, 1.5 ~ 2h of insulation, with 200 DEG C/h heating speed
Rate is heated to 600 ~ 650 DEG C, then is heated to 1000 DEG C with 140 ~ 160 DEG C/h heating rate, and surface is air-cooled to after being incubated 3 ~ 4h
Temperature is 230-250 DEG C.
The step 3）First time tempering process is：It is 230-250 DEG C of liner plate shove charge with 200 DEG C/h liters by surface temperature
Warm speed is heated to 450 ~ 480 DEG C, is incubated 1.5 ~ 2h.
The step 3）Second of tempering process be：Liner plate is heated to 350 ~ 400 DEG C, guarantor with 200 DEG C/h heating rates
1.5 ~ 2h of temperature, cools to normal temperature with the furnace and comes out of the stove.
After casting terminates, the molding box after type will be filled（Containing casting）It is deposited into a dry region, it is desirable to molding box and case
Abut, casting cooling velocity in extension molding box.Two purposes can be reached by so doing：1）The benefit place allowed on molding box emits intraoral molten steel more
It is effective that benefit place is carried out to casting；2）It is effective to prevent from causing to produce casting stress because casting internal-external temperature difference is excessive or small splitting
Line.If in the case where winter or temperature are relatively low, molding box can be covered using box cover type and be incubated.Before unpacking, thermometric is first used
Instrument measures rising head steel body temperature, and 24h or rising head steel body are not more than 50 DEG C and can unpacked after casting.Casting after unpacking is concentrated
Stack, forbid artificially to help to cool down using any type of cooling, casting carries out arrangement polishing, this side after normal temperature state cooling
Method has prevented the stress and crackle or other defect that casting is produced during casting first；Secondly strictly control after heat treating castings again
Secondary generation stress, needs to carry out 2 tempering after liner plate quenching, and tempering for the first time is that quenching rear lining plate is cooled into surface temperature to be
230 ~ 250 DEG C, shove charge carries out 450 ° of tempering to liner plate, forbids liner plate to carry out shove charge again when being cooled to normal temperature, has been tempered for the first time
After terminating entirely, every carrying out second of 400 ° of tempering after 4 ~ 6h to liner plate, cooling to normal temperature with the furnace can come out of the stove.The present invention is by tight
Insulation and Technology for Heating Processing after the casting of lattice control liner plate, are released stress, the service life of liner plate improves 2 ~ 2.5 times,
Impact value >=2.5AK (J/cm2）, mining industry is conquered east using demonstration by Hebei mining industry, Shandong, and reached expected use
Effect.
Claims (1)
1. eliminating the method for stress after duplex metal composite lining board casting, duplex metal composite lining board includes high-chromium alloy layer and mild steel
Layer, the chemical composition of described high-chromium alloy is by weight percentage：C2.2 ~ 3.5%, Cr12 ~ 18%, Mn1.5 ~ 2.0%, Mo0.5
~ 1.0%, Ni0.5%, Cu0.5%, Si1.0 ~ 1.5%, S≤0.1, P≤0.1, Ac≤0.05, remaining is Fe；It is characterized in that：Bag
Include following steps：1）, be incubated after casting：After casting terminates, the molding box after type will be filled and be deposited into a dry region, it is desirable to type
Case is closely packed together with molding box, or use case cover covers molding box and is incubated, the cooling velocity of casting in extension molding box；
2）, open form case：Before open form case, rising head steel body temperature is first measured with temperature measurer, after casting 24 hours, or rising head steel body is not
Casting is concentrated during more than 50 °, you can open form case, after open form case and stacked, after natural cooling, arrangement polishing is carried out；
3）, heat treatment：First time tempering is carried out after being quenched to liner plate, is tempered every carrying out second to liner plate after 4 ~ 6h；Quencher
Sequence is：Liner plate is heated to after 180 ~ 220 DEG C, 1 ~ 1.5h of insulation with 200 DEG C/h heating rate, equally with 200 DEG C/h liter
Warm speed is heated to after 350 ~ 400 DEG C, 1.5 ~ 2h of insulation, and 600 ~ 650 DEG C are heated to 200 DEG C/h heating rate, then with 140
~ 160 DEG C/h heating rate is air-cooled to surface temperature for 230-250 DEG C after being heated to 1000 DEG C, 3 ~ 4h of insulation；It is tempered for the first time
Process is：Surface temperature is heated to 450 ~ 480 DEG C, insulation for 230-250 DEG C of liner plate shove charge with 200 DEG C/h heating rates
1.5~2h；Second of tempering process be：Liner plate is heated to 350 ~ 400 DEG C with 200 DEG C/h heating rates, 1.5 ~ 2h is incubated, with
Stove is cooled to normal temperature and come out of the stove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510594259.8A CN105108114B (en) | 2015-09-18 | 2015-09-18 | The method that stress is eliminated after duplex metal composite lining board casting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510594259.8A CN105108114B (en) | 2015-09-18 | 2015-09-18 | The method that stress is eliminated after duplex metal composite lining board casting |
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| CN105108114A CN105108114A (en) | 2015-12-02 |
| CN105108114B true CN105108114B (en) | 2017-07-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100535136C (en) * | 2005-06-29 | 2009-09-02 | 刘遵砚 | Heat treatment process for antiwear ferrous metal material ZG35CrMnSiBRe |
| CN103643177B (en) * | 2013-12-25 | 2015-10-21 | 马鞍山市盛磊耐磨合金制造有限公司 | A kind of coal pulverizer mill bowl liner plate |
| CN103639357B (en) * | 2013-12-25 | 2015-08-05 | 马鞍山市盛磊耐磨合金制造有限公司 | A kind of preparation method of coal pulverizer mill bowl liner plate |
| CN104249504B (en) * | 2014-01-10 | 2016-08-31 | 靖江市永信特钢有限公司 | A kind of composite abrasion-proof inner plate, manufacture its antifriction alloy and the method manufacturing it |
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Denomination of invention: Method for relieving stress after casting of bimetallic composite lining plate Effective date of registration: 20231110 Granted publication date: 20170728 Pledgee: Jingjiang sub branch of Postal Savings Bank of China Ltd. Pledgor: JIANGSU GUOTAI MACHNERY MANUFACTURING Co.,Ltd. Registration number: Y2023980064710 |
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Granted publication date: 20170728 Pledgee: Jingjiang sub branch of Postal Savings Bank of China Ltd. Pledgor: JIANGSU GUOTAI MACHNERY MANUFACTURING Co.,Ltd. Registration number: Y2023980064710 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: The method of stress relief for bimetallic composite lining plate after casting Granted publication date: 20170728 Pledgee: Jingjiang sub branch of Postal Savings Bank of China Ltd. Pledgor: JIANGSU GUOTAI MACHNERY MANUFACTURING Co.,Ltd. Registration number: Y2024980010650 |