CN103103450A - Material for heat-resisting stainless steel turbine housing - Google Patents
Material for heat-resisting stainless steel turbine housing Download PDFInfo
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- CN103103450A CN103103450A CN2013100684800A CN201310068480A CN103103450A CN 103103450 A CN103103450 A CN 103103450A CN 2013100684800 A CN2013100684800 A CN 2013100684800A CN 201310068480 A CN201310068480 A CN 201310068480A CN 103103450 A CN103103450 A CN 103103450A
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Abstract
The invention relates to a material for a heat-resisting stainless steel turbine housing. The material is characterized by comprising the following components in percentage by mass: 0.3-0.5% of C, 1.5-2.5% of Si, 0.8-1.2% of Mn, <=0.04% of P, <=0.04% of S, 18-27% of Cr, 8-10% of Ni, 1-2% of Nb, and the balance of Fe. The material for the heat-resisting stainless steel turbine housing satisfies the working temperature range of 950-1,050 DEG C of the turbine housing, and has performance of resisting high-temperature corrosion.
Description
Technical field
The present invention relates to a kind of material for the heat-resistance stainless steel turbine case, belong to casting technology field.
Background technology
Turbine case is the key components and parts of supercharging blower, and the application development main flow of current automobile turbocharger transfers petrol engine to from diesel motor.It is the turbine case of material that vapour originally (bavin) oil turbine generally adopts silicon molybdenum and Ni-based spheroidal graphite cast iron, and its heat resisting temperature can not satisfy the higher heat-resisting requirement of present petrol engine lower than 950 degree.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of material for the heat-resistance stainless steel turbine case is provided, satisfy the operating temperature range of 950 ℃～1050 ℃ of turbine cases, have the performance of high-temperature corrosion resistance.
According to technical scheme provided by the invention, a kind of material for the heat-resistance stainless steel turbine case, feature is, comprise following component: C:0.3～0.5%, Si:1.5～2.5%, Mn:0.8～1.2%, P≤0.04%, S≤0.04%, Cr:18～27%, Ni:8～10%, Nb:1～2%, surplus is Fe; Unit is mass percent.
In an embodiment, the content of described Cr is 18～22%; Unit is mass percent.
In an embodiment, the content of described Cr is 23～27%; Unit is mass percent.
In an embodiment, the content of described Ni is 19～21%; Unit is mass percent.
In an embodiment, the content of described Nb is 1.2～1.9%; Unit is mass percent.
Material for the heat-resistance stainless steel turbine case of the present invention satisfies the operating temperature range of 950 ℃～1050 ℃ of turbine cases, has the performance of high-temperature corrosion resistance.
Description of drawings
Fig. 1 is the yield strength variation with temperature figure of the embodiment of the present invention six and the described material of embodiment seven and Comparative Examples one described material; Curve 1 represents the described material of embodiment six, and curve 2 represents the described material of embodiment seven, and curve 3 represents the described material of Comparative Examples one; Wherein, X-coordinate is temperature, and unit is ℃; Ordinate zou is yield strength, and unit is MPa.
Fig. 2 is the metallograph of the described material of the embodiment of the present invention six and Comparative Examples one described material, and magnification is 200 times; Wherein, the left side is the described material of embodiment six, and the right side is the described material of Comparative Examples one.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
The ratio of reasonably optimizing the elements such as material C, Mn, Cr, Ni, Nb, Co for the material of heat-resistance stainless steel turbine case of the present invention, make the internal organizational structure of metallic substance more firm, improve simultaneously material in hot strength and the resistance to high temperature corrosion performance of hot operation state.
The effect of each element of material for the heat-resistance stainless steel turbine case of the present invention is described below:
1, C element: carbon in stainless steel on tissue affect main manifestations both ways, on the one hand it is very strong to austenitic stabilization, and the degree of effect very large (be about nickel 30 times); In addition, consider the subsequent technique performance of foundry goods, the content of C generally is taken at lower limit;
2, Mn element: the effect of manganese is the hot-short tendency of eliminating sulphur in steel, and manganese is similar to nickel for austenitic effect, and manganese effect of stable austenite in steel is about 1/2nd of nickel;
3, Cr element: Cr is the element that determines that stainless rigidity belongs to, and the chromium of some amount is contained in every kind of stainless steel capital, its content 〉=13%; The Cr element is fused to the high-temperature oxidation resistance that matrix can strengthen tissue greatly;
4, Ni element: nickel is good corrosion resistant material, is also the important alloy element of steel alloy; Nickel is to form austenitic element in steel, but the low-carbon (LC) nickel steel will obtain pure austenite structure, and nickel content will reach 24%; And the corrosion resistance nature of steel in some medium significantly changed when only having nickeliferous 27%, so nickel can not consist of separately stainless steel; When but nickel and chromium were present in stainless steel simultaneously, nickeliferous stainless steel but had many valuable performances;
5, Nb element: in order to improve the high-temperature material metallographic structure, crystal grain thinning is optimized the add-on of niobium alloy, adds the Nb amount excessive in steel, the NbC precipitation may occur, lose useful C and measures; During then thermal treatment, the NbC amount of separating out just becomes seldom, thereby affects creep-resistant property; The present invention is through many experiments research, in steel, the optimum content of Nb is 1.2～1.9%, guarantees the tiny NbC of height of formation disperse distribution in tissue, due to the pinning effect of NbC, improved the creep-resistant property of steel, reduced turbine case and produce the tendency of hot tearing under the hot operation condition.
Implement one: a kind of material for the heat-resistance stainless steel turbine case, comprise following component: C:0.3%, Si:1.5%, Mn:0.8%, P≤0.04%, S≤0.04%, Cr:18%, Ni:8%, Nb:1%, surplus is Fe; Unit is mass percent.
Implement two: a kind of material for the heat-resistance stainless steel turbine case, comprise following component: C:0.5%, Si:2.5%, Mn:1.2%, P≤0.04%, S≤0.04%, Cr:27%, Ni:10%, Nb:2%, surplus is Fe; Unit is mass percent.
Implement three: a kind of material for the heat-resistance stainless steel turbine case, comprise following component: C:0.4%, Si:2.0%, Mn:1.0%, P≤0.04%, S≤0.04%, Cr:22%, Ni:9%, Nb:1.5%, surplus is Fe; Unit is mass percent.
Implement four: a kind of material for the heat-resistance stainless steel turbine case, comprise following component: C:0.4%, Si:2.0%, Mn:1.0%, P≤0.04%, S≤0.04%, Cr:23%, Ni:19%, Nb:1.5%, surplus is Fe; Unit is mass percent.
Implement five: a kind of material for the heat-resistance stainless steel turbine case, comprise following component: C:0.4%, Si:2.0%, Mn:1.0%, P≤0.04%, S≤0.04%, Cr:27%, Ni:21%, Nb:1.2%, surplus is Fe; Unit is mass percent.
Implement six: a kind of material for the heat-resistance stainless steel turbine case, comprise following component: C:0.4%, Si:2.0%, Mn:1.0%, P≤0.04%, S≤0.04%, Cr:20%, Ni:20%, Nb:1.9%, surplus is Fe; Unit is mass percent.
Implement seven: a kind of material for the heat-resistance stainless steel turbine case, comprise following component: C:0.45%, Si:1.6%, Mn:1.0%, P≤0.04%, S≤0.04%, Cr:20%, Ni:20%, Nb:1.6%, surplus is Fe; Unit is mass percent.
Comparative Examples one: the D5S material of commonly using in the petrol motor exhaust system in prior art, comprising following component: C:1.85%, Si:5.0%, Mn:0.5%, Cr:1.8%, Ni:34.5%, surplus is Fe; Unit is mass percent.
The mechanical property contrast of the embodiment of the present invention six and the described material of embodiment seven and the described D5S material of Comparative Examples one, as shown in table 1.
Table 1
The yield-point contrast of the embodiment of the present invention six and the described material of embodiment seven and the described D5S material of Comparative Examples one, as shown in Figure 1, because embodiment six and the described material of embodiment seven are fully austenitic structures, thereby has a larger coefficient of thermal expansion, yield-point is higher, can bear the larger thermal stresses because of the thermal expansion generation; Though the described D5S material of Comparative Examples one has larger thermal expansivity, yield-point is not high.Recycle through hundreds of at 900 ℃, embodiment six and the described material of embodiment seven are being better than the D5S material greatly aspect high-temperature oxidation resistance, thermal fatigue property and creep rate.
The metallographic of the described material of the embodiment of the present invention six and the described D5S material of Comparative Examples one contrasts photo as shown in Figure 2, and the left side is the metallograph of embodiment six described materials, and the right side is the metallograph of the described D5S material of Comparative Examples one; As seen from Figure 2, the described material of embodiment six is the material that contains Nb, and crystal grain is tiny, and tiny than the described D5S material of Comparative Examples of intergranular carbide, and the thermal distortion of embodiment six described materials and hot cracking tendency are all less than the D5S material.
Claims (5)
1. material that is used for the heat-resistance stainless steel turbine case, it is characterized in that, comprise following component: C:0.3～0.5%, Si:1.5～2.5%, Mn:0.8～1.2%, P≤0.04%, S≤0.04%, Cr:18～27%, Ni:8～10%, Nb:1～2%, surplus is Fe; Unit is mass percent.
2. the material for the heat-resistance stainless steel turbine case as claimed in claim 1, it is characterized in that: the content of described Cr is 18～22%; Unit is mass percent.
3. the material for the heat-resistance stainless steel turbine case as claimed in claim 1, it is characterized in that: the content of described Cr is 23～27%; Unit is mass percent.
4. the material for the heat-resistance stainless steel turbine case as claimed in claim 1, it is characterized in that: the content of described Ni is 19～21%; Unit is mass percent.
5. the material for the heat-resistance stainless steel turbine case as claimed in claim 1, it is characterized in that: the content of described Nb is 1.2～1.9 %; Unit is mass percent.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9534281B2 (en) | 2014-07-31 | 2017-01-03 | Honeywell International Inc. | Turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same |
| CN106282783A (en) * | 2016-10-18 | 2017-01-04 | 江苏上淮动力有限公司 | The inlet and exhaust valve seat ring of electromotor and inlet and exhaust valve combination |
| US9896752B2 (en) | 2014-07-31 | 2018-02-20 | Honeywell International Inc. | Stainless steel alloys, turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same |
| US10316694B2 (en) | 2014-07-31 | 2019-06-11 | Garrett Transportation I Inc. | Stainless steel alloys, turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same |
| CN115213352A (en) * | 2022-08-12 | 2022-10-21 | 肇庆匹思通机械有限公司 | Volute forming process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH055161A (en) * | 1990-08-02 | 1993-01-14 | Hitachi Metals Ltd | Austenitic heat resistant cast steel excellent in high temperature strength and exhaust system part made thereof |
| CN1916220A (en) * | 2006-08-28 | 2007-02-21 | 无锡烨隆精密机械有限公司 | High heat-resistant turbine sheel of turbocharger |
| CN101560633A (en) * | 2009-05-26 | 2009-10-21 | 无锡烨隆精密机械有限公司 | Technical method for producing heat-resisting alloy steel casting below 1000 DEG C |
-
2013
- 2013-03-04 CN CN2013100684800A patent/CN103103450A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH055161A (en) * | 1990-08-02 | 1993-01-14 | Hitachi Metals Ltd | Austenitic heat resistant cast steel excellent in high temperature strength and exhaust system part made thereof |
| CN1916220A (en) * | 2006-08-28 | 2007-02-21 | 无锡烨隆精密机械有限公司 | High heat-resistant turbine sheel of turbocharger |
| CN101560633A (en) * | 2009-05-26 | 2009-10-21 | 无锡烨隆精密机械有限公司 | Technical method for producing heat-resisting alloy steel casting below 1000 DEG C |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9534281B2 (en) | 2014-07-31 | 2017-01-03 | Honeywell International Inc. | Turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same |
| US9896752B2 (en) | 2014-07-31 | 2018-02-20 | Honeywell International Inc. | Stainless steel alloys, turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same |
| US10316694B2 (en) | 2014-07-31 | 2019-06-11 | Garrett Transportation I Inc. | Stainless steel alloys, turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same |
| CN106282783A (en) * | 2016-10-18 | 2017-01-04 | 江苏上淮动力有限公司 | The inlet and exhaust valve seat ring of electromotor and inlet and exhaust valve combination |
| CN115213352A (en) * | 2022-08-12 | 2022-10-21 | 肇庆匹思通机械有限公司 | Volute forming process |
| CN115213352B (en) * | 2022-08-12 | 2024-02-02 | 肇庆匹思通机械有限公司 | Volute forming process |
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Application publication date: 20130515 |