CN1012739B - Low-cr, b multi-element alloy anti-wear cast iron - Google Patents
Low-cr, b multi-element alloy anti-wear cast ironInfo
- Publication number
- CN1012739B CN1012739B CN 89105003 CN89105003A CN1012739B CN 1012739 B CN1012739 B CN 1012739B CN 89105003 CN89105003 CN 89105003 CN 89105003 A CN89105003 A CN 89105003A CN 1012739 B CN1012739 B CN 1012739B
- Authority
- CN
- China
- Prior art keywords
- cast iron
- low
- carbide
- iron
- wear
- 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
Links
Images
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention provides low-Cr and B multi-element alloy anti-wear cast iron which comprises chemical components: 1.75 to 3.0 wt% of C, 1.5 to 4.0 wt% of Cr, 0.07 to 0.4 wt% of B, 0.2 to 1.0 wt% of Mo, 0.8 to 1.3 wt% of Cu, 0.4 to 0.8 wt% of Mn, 0.4 to 1.2 wt% of Si, at most 0.08 wt% of P, at most 0.08 wt% of S, 0.01 to 0.05 wt% of Re and Fe as the rest.
Description
The present invention relates to a kind of antifriction cast iron, particularly a kind of low-cr, B multi-element alloy anti-wear cast iron.
At present, only the metal wear resistant material that expends every year of industry such as the machinofacture of China, mine and cement just above top ten thousand tons.And these wear-resistant metal materials account for the overwhelming majority with ferrous material, and as high mangaenese steel commonly used and high chromium series antifriction cast iron etc., under certain working conditions, the wear resistance of high mangaenese steel is relatively poor, thereby makes range of application be restricted.Though high chromium series antifriction cast iron wear resistance is better, because the chromium resource of China is more scarce, so make its production cost higher and limited this product promoting the use of in bigger field.
It is low and have excellent abrasive resistance and a flexible low-cr, B multi-element alloy anti-wear cast iron to the purpose of this invention is to provide a kind of production cost.
The chemical ingredients of low-cr, B multi-element alloy anti-wear cast iron proposed by the invention (weight %) is:
C 1.75-3.0，Cr 1.5-4.0，
B 0.07-0.40，Mo 0.2-1.0，
Cu 0.8-1.3，Mn 0.4-0.8，
Si 0.4-1.2，P ≤0.08，
S ≤0.08， RE 0.01-0.05，
Surplus is Fe.
It is big that the present invention has made full use of China's paigeite reserves, aboundresources, and smelt the contradiction that product-the pig iron containing boron purposes is little of separating paigeite.Make the main production raw material of this cast iron of pig iron containing boron.The boracic resource is utilized further, also reduced the chromium content in the high chromium series antifriction cast iron effectively.Its over-all properties is high mangaenese steel head and shoulders above, and quite or a little more than the high chromium series antifriction cast iron, and its production cost only is equivalent to high mangaenese steel, and less than half of high chromium series antifriction cast iron.
Be described in detail the selection foundation and the smelting heat treatment process of chemical ingredients of the present invention below in conjunction with embodiment.
The selection of Chemical Composition is according to being:
(1) carbon: C is the forming element of carbide.And in anti-(resisting) mill cast iron, the composition of carbide, form, distribution and quantity are the key factors of its performance of decision.In the hypoeutectic scope, increase with carbon content, produce the corresponding increase of quantity of carbide, hardness and wear resistance improve, and fragility increases simultaneously, and toughness descends.Show according to test: the carbon amount is too high thick flaky carbide can to occur, and toughness can descend on the contrary, and carbon content is crossed the carbide decreases in the low metal, and the wear resistance of cast iron is had adverse influence.
(2) chromium: Cr strengthens to form the carbide element.It can replace the part iron atom and form compound cementite and complex compound.Cause a large amount of carbide to occur and chromium content is too high, though improved the hardness and the wear resistance of metal, toughness descends significantly.Through a large amount of tests and proof relatively repeatedly, it is 1,5～4,0% comparatively suitable that chromium is controlled at, and this had both taken into account the comprehensive mechanical performance of antifriction cast iron, had reduced the add-on of chromium again effectively, reached the purpose that reduces cost.
(3) boron: B is carbide-forming element in cast iron.It can make Fe-C-Cr element eutectic attitude move to left.Its maximum solid solution degree in austenite is 0.018%, and all the other boron enter carbide and form boron-carbide.Boron can significantly improve the hardening capacity of metallic substance, makes cast iron nodular troostite or martensite occur.Increase with boron-containing quantity, the boron-carbide structure will complicate, and quantity also increases, and the microhardness of its macrohardness and boron-carbide also improves thereupon, and toughness but descends.Show through a large amount of tests: the boron content in this cast iron is if be lower than 0.07%, and it wears no resistance, if be higher than at 0.40% o'clock, the toughness of cast iron obviously reduces, and fragility increases.
(4) molybdenum: Mo is the element that significantly improves hardening capacity, but both solid solution can form carbide and complicated multicarbide again in ferrite or austenite.Molybdenum is distributed between eutectic carbides and matrix, can refinement carbide and crystal grain.Therefore, add the comprehensive mechanical performance that molybdenum can improve cast iron.
(5) effect of copper: Cu in ferrite is similar to nickel, in order to improve its hardening capacity, toughness and crystal grain thinning.
(6) manganese: Mn can form carbide, can be dissolved in matrix again, manganese can be stablized perlite, increases residual austenite.Though manganese height carbide increases, fragility increases.It is 0.4～0.8% comparatively suitable that the manganese amount is controlled at.
(7) silicon: Si promotes graphite element, and the tendency that reduces spoken parts in traditional operas is arranged.Silicon can improve the castability of cast iron.Silicon influences toughness, and the silicon height can cause fragility to increase.Silicon be controlled at 0.40～1.2% more suitable.
(8) phosphorus, sulphur: P and S are the detrimental impurity of sneaking into in furnace charge or the alloying process.Ying Yiyue is low good more.
(9) RE residual volume: rare earth adds with alterant in this cast iron, and purpose is to make the continuous net-shaped carbide in the cast iron to become the suspension shape.The RE residual volume is crossed the low metamorphism that then do not have, and too highly can generate re inclusion again, has reduced the toughness of cast iron.
Technical process of the present invention is: batching-melting-adjustment composition-and with alterant-come out of the stove-pour into a mould-thermal treatment.
The main raw material of batching is made up of following: furnace charge mainly is pig iron containing boron and steel scrap, if there is not pig iron containing boron to add ferro-boron again with other pig iron and steel scrap.Preferably adopt pig iron containing boron, the boron in the pig iron containing boron is rationally utilized, can reduce the production cost of antifriction cast iron again.Allocate a certain amount of useless carbon pole piece again into when other raw materials such as carbon ferrochrome, molybdenum-iron, copper scrap or carbon are low, can add once with above-mentioned furnace charge.In order to control Chemical Composition more accurately, improve the quality of products, disposable raw material of going into stove should be allocated into by optimum chemical ingredients, i.e. (weight %) C:1.75～2.40, Cr:1.5～2.5, B:0.10～0.22, Mo:0.4～0.8, Cu:0.9～1.2.
The melting type of furnace adopts 150KVA(250kg) medium-frequency induction furnace.When the iron liquid temp reaches 1500 ℃ in the stove, adjust the Chemical Composition of iron liquid after the chemical examination again.If low by above-mentioned optimum composition control method manganese, silicon, add ferrosilicon and ferromanganese again, (rate of recovery grasp is bad also can to add in this stage if chromium adds with furnace charge), silicon and manganese are transferred to: Si0.4～0.8%, Mn0.4～0.6% fully stirs subsequently.Alterant preferably adopts rare earth ferrosilicon alloy No. 1, and its composition is: content of rare earth 30～35%, and silicon 35～45%, all the other are iron.The add-on of No. 1 rare earth is advisable with 0.4～0.8%.Rare earth alloy can disposablely add in the iron liquid in stove, also can divide and do two batches of addings, and is a part of in stove, and another part pours with turning in the stove molten iron flow direction bag.The optimum control content of RE is 0.03～0.05%.Phosphorus sulphur in the iron liquid preferably is controlled at below 0.05% in whole fusion process.After finishing aforesaid operations, stir to skim once more and tap a blast furnace, to be cast.Its teeming temperature is 1430 ℃～1470 ℃.Casting mold can be used dry type, the most handy wet type.
By above-mentioned technological operation, a stove chemical ingredients wherein is (weight %): C 1.79 Cr 2.22, and B 0.11, and Mo 0.60, Cu 1.20, and Mn 0.54, and Si 0.61, P 0.039, and S 0.032, and RE residual 0.03.And casting out 700 * 70 * 70mm with wet type with this stove iron liquid, weight is the bar of 28kg.Through the tempering of 950 ± 10 ℃ of quenchings and 260 ± 10 ℃, the time is 3 hours.The mechanical property of this bar is after the thermal treatment: HRC=54, ak=10.3.Accompanying drawing is the metallographic structure of (* 400) after this bar thermal treatment: the boron-carbide of martensite+sorbite (nodular troostite)+suspension shape.
Service condition: this bar is tested in φ 1000 * 700mm impact crusher, and three of times spent are one group, and broken hardness is the sulfurous iron ore of 7 grades of Mo Shi.Its working hour is 42 hours, and is 24 hours at the high-manganese steel plate hammer that uses with machine, and high chromium series antifriction cast iron bar is 39 hours, improves 75% than high mangaenese steel work-ing life, and is also slightly higher than high chromium series bar.The present invention's being applied in this and just not doing more narrations in other respects.
Claims (2)
1, a kind of low-cr, B multi-element alloy anti-wear cast iron is characterized in that the chemical ingredients (weight %) of this cast iron is: C1.75-3.0, Cr1.5-4.0, B0.07-0.40, Mo0.2-1.0, Cu0.8-1.3, Mn0.4-0.8, Si0.4-1.2, P≤0.08, S≤0.08, RE0.01-0.05, surplus is Fe.
2, the thermal treatment process of the described low-cr, B multi-element alloy anti-wear cast iron of claim 1 is characterized in that quenching temperature is 950 ± 10 ℃, and tempering temperature is 260 ± 10 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105003 CN1012739B (en) | 1989-01-09 | 1989-01-09 | Low-cr, b multi-element alloy anti-wear cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105003 CN1012739B (en) | 1989-01-09 | 1989-01-09 | Low-cr, b multi-element alloy anti-wear cast iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1037548A CN1037548A (en) | 1989-11-29 |
| CN1012739B true CN1012739B (en) | 1991-06-05 |
Family
ID=4855775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89105003 Expired CN1012739B (en) | 1989-01-09 | 1989-01-09 | Low-cr, b multi-element alloy anti-wear cast iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1012739B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035520C (en) * | 1993-10-14 | 1997-07-30 | 彭伯勋 | Low alloy white cast iron foundery grinding ball for nodular iron ore powder |
| CN103484755A (en) * | 2013-09-05 | 2014-01-01 | 常熟市勤丰铸件厂 | High-temperature-resistant casting |
| CN107557657B (en) * | 2017-09-06 | 2020-02-07 | 马鞍山市中马金属材料有限公司 | Low-chromium alloy wear-resistant steel ball with composite wear-resistant layer and manufacturing method thereof |
-
1989
- 1989-01-09 CN CN 89105003 patent/CN1012739B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1037548A (en) | 1989-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100453681C (en) | High boron wear-resisting casting steel and preparation process thereof | |
| CN102383066B (en) | Abrasion resistant cast steel and preparation method thereof | |
| CN100453686C (en) | Casting high boron abrasion-proof stainless steel containing high hardness boride and preparation method thereof | |
| CN102367558B (en) | A kind of pump boric low alloy wear resistant steel | |
| CN100415923C (en) | High-strength casted air-colled bainite wear-resisting steel and preparing method | |
| CN100580125C (en) | High-strength micro-alloy low-carbon bainite steel and production method thereof | |
| CN100386462C (en) | Boron contg. multi-element low alloyed wearable cast steel and prepn. thereof | |
| CN105200337A (en) | High-strength abrasion-resisting steel plate and production method thereof | |
| CN108950432B (en) | Manufacturing method of high-strength and high-toughness low-alloy wear-resistant steel | |
| CN101497971B (en) | High-strength hardened and tempered steel and production method thereof | |
| CN103757516A (en) | Wear-resisting white cast iron and preparation method thereof | |
| US11959158B2 (en) | Hot-work die steel with high toughness at low temperatures and high strength at high temperatures and high hardenability and preparation method thereof | |
| CN101550518A (en) | Boron-containing multi-element low alloy wear resistant cast steel and preparing method thereof | |
| CN103114252A (en) | Low-alloy wear-resistant steel for lining plate and preparation method thereof | |
| CN103993239A (en) | Mine wet mill liner and making method thereof | |
| CN1276113C (en) | High boron foundry iron base anti-wear alloy and its heat treatment method | |
| CN1055507C (en) | High ductility high chromium abrasion-resistant ball for ball grinder and its manufacturing method | |
| CN106893941B (en) | A kind of low-alloy wear-resistant steel and its heat treatment method | |
| CN113897541B (en) | High-chromium wear-resistant steel ball and casting process thereof | |
| CN111378909A (en) | High-toughness high manganese steel lining plate and production process thereof | |
| CN114717467A (en) | Hypereutectic high-chromium cast iron material, preparation method and application thereof | |
| CN1261607C (en) | Strongtough high gilicon cast steel and its manufacturing method | |
| CN111218540B (en) | High-boron iron-based wear-resistant alloy, preparation method and part thereof | |
| CN1012739B (en) | Low-cr, b multi-element alloy anti-wear cast iron | |
| CN110724874A (en) | High-manganese austenitic steel with corrosion and wear resistance and preparation method of hot rolled plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |