CN103266284A - Formula and heat treatment method for high-boron wear-resistant stainless steel - Google Patents
Formula and heat treatment method for high-boron wear-resistant stainless steel Download PDFInfo
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Abstract
The invention discloses a formula and a heat treatment method for high-boron wear-resistant stainless steel. The formula comprises the following chemical ingredients in percentage by weight: 0.03-0.10% of C, 1.0-3.0% of B, 19-25% of Cr, 5.0-7.0% of Ni, 1.0-2.5% of Ti, 0.08-0.20% of N, 0.04-0.15% of Y, 0.03-0.1% of Mg, 0.02-0.08% of Ca, less than 2.0% of Si, less than 2.0% of Mn, less than 0.04% of S, less than 0.04% of P, and the balance of Fe. The heat treatment method comprises the steps of solid solution, quenching and tempering. The formula and the heat treatment method disclosed by the invention are simple in process, low in the added amount of precious alloys, and low in production cost. The matrix structure mainly comprises austenite, also contains 8-15% of high-hardness boron compounds, as well as is good in corrosion resistance and wear resistance. The high-boron wear-resistant stainless steel is used for producing sink rolls and shaft sleeves on a wire mill, and has a service life which is increased by 80-100% compared with 1Cr18Ni9Ti stainless steel components.
Description
Technical field
The present invention relates to the stainless prescription of high boron wear-resisting and heat treating method.
Background technology
The loss that Corrosion of Metallic Materials is brought to national economy is very surprising.According to statistics, the weight of the annual metal products that lost efficacy because of corrosion is equivalent to 1/3rd of metal annual production approximately in the world.In industrial prosperity and the widely used Great Britain and USA of steel protection technology, the financial loss that causes because of corrosion accounts for 2%～4% of total value of production in national economy, and China is because the safeguard procedures enforcement of steel is unfavorable, and the loss proportion that corrosion causes is bigger.In addition, corrosion also causes losses such as equipment repair, replacing and stopping production.Surface treatment is to improve one of effective means of material solidity to corrosion, has obtained at present to use widely in industrial production.Pot galvanize is the steel material surface treatment process that is most widely used, and is the important channel of improving the steel plate corrosion resisting property.In the hot-dip galvanizing sheet steel production process, molten zinc corrosion resistant worn partss such as sinking roller and axle sleeve there is great demand.The present invention develops a kind of chemical composition and heat treating method thereof of casting high-boron abrasion-proof stainless steel.Its principal feature is to add more boron and titanium in chromium nickel stainless steel, and purpose is for the siderochrome boron compound that obtains high rigidity and titanium boron compound, improves the wear resistance of material.China's pot galvanize is at present produced, and the molten zinc corrosion resistant worn partss such as roller and axle sleeve that only sink cost nearly 1,000,000,000 yuan of gold, develop suitable guide and guard material and preparation, are applied on the steel rolling equipment, will promote the fast-developing of steel rolling industry and save a lot of resources.
Summary of the invention
Purpose of the present invention will provide the stainless prescription of a kind of high boron wear-resisting and heat treating method exactly, and it can improve corrosion-resistant, the wear resisting property of material, and reduces production costs greatly.The object of the present invention is achieved like this, and the stainless prescription of high boron wear-resisting and heat treating method is characterized in that: chemical ingredients and weight percent prescription are C:0.03-0.10, B:1.0-3.0, Cr:19-25, Ni:5.0-7.0, Ti:1.0-2.5, N:0.08-0.20, Y:0.04-0.15, Mg:0.03-0.1, Ca:0.02-0.08, Si＜2.0, Mn＜2.0, S＜0.04, P＜0.04, surplus are Fe.The stainless heat treating method of high boron wear-resisting, the first step operation is solution treatment, and the second step operation is quench treatment, and three-procedure is temper.
The stainless solid solution treatment method of described high boron wear-resisting is 900 ~ 1100 ℃ of Heating temperatures, is incubated 3-5 hour, and stove is cold less than the cold or air cooling of stove after 500 ℃; The stainless quenching process of described high boron wear-resisting is 1100 ~ 1150 ℃ of Heating temperatures, oil cooling subsequently; The stainless tempering method for treating of described high boron wear-resisting is Heating temperature 300 ~ 500 degree, is incubated 4-6 hour, subsequently cold the or air cooling of stove.Technology of the present invention is simple, and raw material sources are abundant, and valuable alloy addition is few, low production cost.The matrix of product mainly is austenite, has good solidity to corrosion, also contains 8%～15% high rigidity boron compound on matrix, can obviously improve the wear resistance of steel.With polynary microalloy the high boron wear-resisting stainless steel is carried out composite inoculating and handle, can make and organize tinyly, inclusion obviously reduces, and the form of inclusion and the obviously improvement that distributes, therefore mechanical properties of cast steel obviously improves, and wherein tensile strength reaches 820～950MPa, and impelling strength reaches 32～40J/cm
2, fracture toughness property reaches 52～60MPa.m
1/2, hardness reaches 38～45HRC.On the On-line Product mill that the present invention produces, for the production of sinking roller and axle sleeve, improve 80-100% than 1Cr18Ni9Ti parts of stainless steel its work-ing life, improved pot galvanize unit operation rate, reduce pot galvanize products production cost, have remarkable economical and social benefit.
Embodiment
The stainless prescription of high boron wear-resisting and heat treating method is characterized in that: chemical ingredients and weight percent prescription are C:0.03-0.10, B:1.0-3.0, Cr:19-25, Ni:5.0-7.0, Ti:1.0-2.5, N:0.08-0.20, Y:0.04-0.15, Mg:0.03-0.1, Ca:0.02-0.08, Si＜2.0, Mn＜2.0, S＜0.04,, P＜0.04, surplus is Fe.The stainless heat treating method of described high boron wear-resisting is solid solution, quenching, tempering.
The stainless solid solution treatment method of described high boron wear-resisting is 900 ~ 1100 ℃ of Heating temperatures, is incubated 3-5 hour, and stove is cold less than the cold or air cooling of stove after 500 ℃; The stainless quenching process of described high boron wear-resisting is 1100 ~ 1150 ℃ of Heating temperatures, oil cooling subsequently; The stainless tempering method for treating of described high boron wear-resisting is Heating temperature 300 ~ 500 degree, is incubated 4-6 hour, subsequently cold the or air cooling of stove.Add more boron and titanium, purpose is for the siderochrome boron compound that obtains high rigidity and titanium boron compound, improves the wear resistance of material.Add an amount of nitrogen and Yttrium base rare earth in addition, make its structure refinement, particularly make the suspension of siderochrome boron compound and isolated the distribution, also add an amount of magnesium and calcium, can change type, quantity, size, form and the distribution of inclusion in the cast steel, be conducive to increasing substantially of casting high-boron abrasion-proof stainless steel mechanical property.
Embodiment 1. adds in common austenite 316 stainless steels and surpasses the 1.0%(massfraction) boron, ferro-boron is crushed to the fritter that granularity is 8 ~ 12mm, through 180 ~ 220 ℃ the oven dry 2 ~ 4 hours after, place the casting ladle bottom, use the method that pours in the bag that molten steel is carried out composite inoculating with polynary microalloy and handle, the complex tissue of the high rigidity boride that obtained under the as cast condition to distribute on the austenitic matrix.By measurement means such as opticmicroscope, scanning electron microscope, electronic probe, energy spectrum analysis, X-ray diffraction and Vickers' hardnesses, composition and the distribution situation of alloying element in boride and metallic matrix of boride be can find, microstructure and changes of properties situation after the wear-resistant stainless steel high temperature solid solution of high boron obtained.The main composition that found that boride is Fe, Cr, B, also contains minor N i, Mn, C, Si in addition and is insoluble to substantially in the boride, and boride hardness surpasses HV1500.After high temperature solid solution was handled, boride did not decompose, but the local dissolution phenomenon occurs, and the solid solubility of B in the austenite is increased, and impelled the wear-resistant stainless steel hardness of high boron to improve 8.54%.The wear-resistant stainless steel of high boron is for the manufacture of zinc liquid transport pipe, and improve 1.5-1.8 doubly than common stainless steel work-ing life.
Claims (5)
1. the stainless prescription of high boron wear-resisting and heat treating method, it is characterized in that: chemical ingredients and weight percent prescription are C:0.03-0.10, B:1.0-3.0, Cr:19-25, Ni:5.0-7.0, Ti:1.0-2.5, N:0.08-0.20, Y:0.04-0.15, Mg:0.03-0.1, Ca:0.02-0.08, Si＜2.0, Mn＜2.0, S＜0.04,, P＜0.04, surplus is Fe; The stainless heat treating method of high boron wear-resisting, the first step operation is solution treatment, and the second step operation is quench treatment, and three-procedure is temper.
2. the stainless prescription of high boron wear-resisting according to claim 1 and heat treating method, it is characterized in that: described solid solution treatment method is 900 ~ 1100 ℃ of Heating temperatures, is incubated 3-5 hour, stove is cold less than the cold or air cooling of stove after 500 ℃.
3. the stainless prescription of high boron wear-resisting according to claim 1 and heat treating method, it is characterized in that: described quenching process is 1100 ~ 1150 ℃ of Heating temperatures, oil cooling subsequently.
4. the stainless prescription of high boron wear-resisting according to claim 1 and heat treating method is characterized in that: the stainless tempering method for treating of described high boron wear-resisting is Heating temperature 300 ~ 500 degree, is incubated 4-6 hour, subsequently cold the or air cooling of stove.
5. the stainless prescription of high boron wear-resisting according to claim 1 and heat treating method is characterized in that: adopt polynary microalloy to use the method that pours in the bag that molten steel is carried out composite inoculating and handle.
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| CN2013101928658A CN103266284A (en) | 2013-05-23 | 2013-05-23 | Formula and heat treatment method for high-boron wear-resistant stainless steel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846305A (en) * | 2015-04-10 | 2015-08-19 | 武钢集团昆明钢铁股份有限公司 | Heat sink roll preheating method with full preheating and uniform heating |
| CN107312918A (en) * | 2017-06-13 | 2017-11-03 | 安徽绿环泵业有限公司 | A kind of processing method for improving chemical pump pump shaft acid-resistant corrosion |
| CN108774716A (en) * | 2018-06-27 | 2018-11-09 | 赵云飞 | One kind stainless steel material containing yttrium and preparation method thereof |
| CN113046521A (en) * | 2021-03-29 | 2021-06-29 | 杭州汽轮铸锻有限公司 | Corrosion-resistant treatment device and treatment process for stainless steel compressor screw |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924070A (en) * | 2006-09-01 | 2007-03-07 | 西安交通大学 | Casting high boron abrasion-proof stainless steel containing high hardness boride and preparation method thereof |
-
2013
- 2013-05-23 CN CN2013101928658A patent/CN103266284A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924070A (en) * | 2006-09-01 | 2007-03-07 | 西安交通大学 | Casting high boron abrasion-proof stainless steel containing high hardness boride and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846305A (en) * | 2015-04-10 | 2015-08-19 | 武钢集团昆明钢铁股份有限公司 | Heat sink roll preheating method with full preheating and uniform heating |
| CN104846305B (en) * | 2015-04-10 | 2017-05-03 | 武钢集团昆明钢铁股份有限公司 | Heat sink roll preheating method with full preheating and uniform heating |
| CN107312918A (en) * | 2017-06-13 | 2017-11-03 | 安徽绿环泵业有限公司 | A kind of processing method for improving chemical pump pump shaft acid-resistant corrosion |
| CN108774716A (en) * | 2018-06-27 | 2018-11-09 | 赵云飞 | One kind stainless steel material containing yttrium and preparation method thereof |
| CN113046521A (en) * | 2021-03-29 | 2021-06-29 | 杭州汽轮铸锻有限公司 | Corrosion-resistant treatment device and treatment process for stainless steel compressor screw |
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Application publication date: 20130828 |