CN106467955A - Boride reinforced pipe material with low cost and high strength - Google Patents
Boride reinforced pipe material with low cost and high strength Download PDFInfo
- Publication number
- CN106467955A CN106467955A CN201610829488.8A CN201610829488A CN106467955A CN 106467955 A CN106467955 A CN 106467955A CN 201610829488 A CN201610829488 A CN 201610829488A CN 106467955 A CN106467955 A CN 106467955A
- Authority
- CN
- China
- Prior art keywords
- tube material
- boride
- alloy
- less
- low
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 42
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 28
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 28
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 24
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 24
- 229910052796 boron Inorganic materials 0.000 claims abstract description 21
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 18
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 15
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 14
- 239000011159 matrix material Substances 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims description 18
- 238000002844 melting Methods 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 14
- 230000006698 induction Effects 0.000 claims description 9
- 238000005728 strengthening Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 210000001787 dendrite Anatomy 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 150000001639 boron compounds Chemical class 0.000 claims 1
- 239000000956 alloy Substances 0.000 abstract description 50
- 229910045601 alloy Inorganic materials 0.000 abstract description 49
- 239000013078 crystal Substances 0.000 abstract description 3
- 229910001566 austenite Inorganic materials 0.000 abstract 1
- 230000007774 longterm Effects 0.000 abstract 1
- 239000011651 chromium Substances 0.000 description 28
- 239000011572 manganese Substances 0.000 description 22
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 239000010413 mother solution Substances 0.000 description 10
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 5
- 241001062472 Stokellia anisodon Species 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 230000003064 anti-oxidating effect Effects 0.000 description 2
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000007788 roughening Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 229910003470 tongbaite Inorganic materials 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 101001055216 Homo sapiens Interleukin-9 Proteins 0.000 description 1
- 102100026871 Interleukin-9 Human genes 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003026 anti-oxygenic effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
A boride reinforced tube material with low cost and high strength comprises the following alloy components in percentage by mass: c: 0.2-0.5%, Cr: 5-25%, Ni: 20-25%, Co: 0.5 to 3.0%, Mn: 0.1% -0.5%, Si: 0.1% -0.5%, W: 5.0% -7.5%, Al: 5-15%, Ti: 0.5-2.5%, Nb: 1.0-1.5%, B: 0.5-1.2% and the balance Fe. The alloy as-cast structure is mainly composed of carbide and boride alternately distributed in austenite matrix and dendritic crystal boundaries. Wherein the boride accounts for not less than 5 percent by volume, and Cr23C6The volume fraction is not less than 10%. The alloy has stable structure under the condition of high-temperature long-term thermal exposure, the size of a precipitated phase is not changed greatly, no obvious second phase is precipitated in the crystal, and no new phase is formed.
Description
Technical field
The invention belongs to high temperature field of alloy steel is and in particular to a kind of boride strengthening with low-cost high-strength is new
Tube material, is particularly well-suited to the portion of life-time service under the conditions of the superhigh temperature (more than 1000 DEG C) such as cracking furnace pipe in ethylene production
Part, also apply be applicable to the parts such as coal burner nozzle in thermal power generation unit, the centrifuge in glass fiber industry, Yi Jiyi
A little relatively low parts of temperature, such as HK-40 Tube at Hydrogen Reformer, nuclear power generating sets PWR steam generator pipe heat pipe and fired power generating unit pot
Stove reheater etc..
Background technology
The carbide of certain volume fraction is the important leverage of austenitic heat-resistance steel elevated temperature strength performance, therefore at present in height
The lower heat resisting steel using of temperature generally has higher Cr, C content, by forming large-sized nascent Cr in grain boundaries23C6And it is brilliant
The interior secondary Cr separating out small and dispersed distribution23C6And make alloy obtain excellent elevated temperature strength performance.However, alloy in high temperature or
Under low temperature condition of high ground stress during long service, Cr23C6Higher roughening is grown up and is inclined to and with the interface Cr element occurring
Barren phenomenon all can cause very detrimental effect to the military service performance of alloy.People have carried out a series of trials in recent years, knot
Fruit confirms that the interpolation of Nb element can be formed and the alternatively distributed NbC of chromium carbide in crystal boundary.Size is very steady at high temperature for the latter
Fixed, inhibit Cr to a great extent simultaneously23C6Roughening grow up.Wherein, one of most representational achievement is to HP40
Add a small amount of Nb, Ti element in alloy (25Cr35Ni) cast tube, obtain having higher structure stability and rupture ductility
HP40Nb alloy, so that material obtains longer service life.
But, this material exposes the unstable problem of tissue in use.Because alloy is using intermediate frequency sense
Be difficult to avoid that when answering stove melting and can introduce certain Si element, and its can with alloy in (Nb, Ti) C reaction and and occur to G
Phase (Ni16Nb6Si7) transformation, and ultimately result in the grain boundaries that the G phase of bulk is present in material, it is unfavorable that alloy plasticity is caused
Impact.Additionally, (Nb, Ti) C also can cause intensity herein weak along with G phase and the lean Ni of basal body interface to during G phase in version
Change, further adverse effect is caused to the mechanical behavior under high temperature of material.
The boride stability more excellent than having with Carbide Phases and higher hardness, because of its excellent anti-wear performance
And receive significant attention as roll candidate materials.However, the addition of too high boron element can cause boron in alloy graining process
Compound is existed with net pattern, and then causes " boron is crisp " phenomenon and bring harm to material military service performance, simultaneously also can be to material
Machinability bring extreme influence.
Content of the invention
For overcoming the problems of the prior art, it is an object of the invention to provide a kind of boronation with low-cost high-strength
Thing strengthens tube material, eliminates material " boron is crisp " phenomenon when superhigh temperature (1000 DEG C) is used above and material military service performance is caused
Harm.Additionally, adding the Al of certain content to possess excellent antioxidation under ultra-high temperature condition to guarantee alloy in alloy
With corrosion resistance.
In order to realize above goal of the invention, the technical solution adopted in the present invention is:
A kind of boride strengthening tube material with low-cost high-strength, this tube material composition meets such as by mass percentage
Lower area requirement:C:0.2~0.5%, Cr:5~25%, Ni:20~25%, Co:0.5~3.0%, Mn:0.1%~0.5%,
Si:0.1%~0.5%, W:5.0%~7.5%, Al:5~15%, Ti:0.5~2.5%, Nb:1.0~1.5%, B:0.5~
1.2%, balance of Fe.
The present invention is further improved by, and the mass percent of B and C meets B/C=1.5~2.5, and works as Al mass hundred
Divide than during less than 7%, Cr mass percent is not less than 22%.
The present invention is further improved by, and the as-cast structure of this tube material is mainly replaced with dendrite circle by austenitic matrix
The carbide of distribution is constituted with boride;Wherein, boride accounts for volume fraction and is not less than 5%, Cr23C6Volume fraction is not less than
10%.
The present invention is further improved by, and this tube material is respectively higher than 90MPa in 1000 DEG C and 1100 DEG C of yield strengths
And 45MPa, when 1050 DEG C, oxidation rate is less than 1.5 × 10-11g2cm-4s-1.
The present invention is further improved by, and this tube material adopts intermediate frequency furnace melting, and directly uses under as cast condition.
The present invention is further improved by, and when military service working condition pressure is more than 5MPa, this tube material adopts vacuum induction
Stove melting, and it is aided with electroslag remelting process preparation.
Compared with prior art, the device have the advantages that:
1st, the present invention adds higher B element and by adjusting B, the ratio of C element on the basis of HK40 alloying component, promotees
Enter to form (Nb, Ti) B and Cr23C6In the alternatively distributed tissue topography of grain boundaries, suppress continuous net-shaped Cr23C6With (Nb, Ti) B's
Formed.Alloying component meets following area requirement by mass percentage:C:0.2~0.5%, Cr:5~25%, Ni:20~
25%, Co:0.5~3.0%, Mn:0.1%~0.5%, Si:0.1%~0.5%, W:5.0%~7.5%, Al:5~15%,
Ti:0.5~2.5%, Nb:1.0~1.5%, B:0.5~1.2%, balance of Fe.Alloy adopts intermediate frequency furnace melting, and in as cast condition
Lower directly use, but when alloy military service working condition pressure is more than 5MPa, alloy should adopt vacuum induction melting, and is aided with electroslag
Prepared by remelting processing.As-cast Microstructure is mainly by austenitic matrix and the alternatively distributed carbide of dendrite circle and boride structure
Become.Wherein, boride and carbide account for volume fraction and are not lower than 5% and 10% respectively.
2nd, one of using boride as main hardening constituent, during alloy casting state, (Nb, Ti) B volume fraction is not less than 5% to alloy,
Provide safeguard with hardness for possessing good intensity under alloy high-temp.
3rd, alloy microstructure assumes (Nb, Ti) B and Cr23C6It is alternately distributed pattern in grain boundaries, suppression is continuous net-shaped
Cr23C6Formation with (Nb, Ti) B.Tissue stabilization, under the conditions of prolonged heat exposure, no new thing phase separates out, and tissue topography changes not
Substantially.
4th, alloy, while guaranteeing good elevated temperature strength, decreases the constituent contents such as Ni, Cr, effectively reduces alloy former
Material cost.
The 5th, higher B element is added on HK40 alloy (25Cr20Ni) component base, promotes nascent boride (Nb, Ti)
The formation of B, and by adjusting B, the ratio of C element, promote to form (Nb, Ti) B and Cr23C6In the alternatively distributed tissue of grain boundaries
Pattern is it is suppressed that continuous net-shaped Cr23C6With the formation of (Nb, Ti) B, eliminate material when superhigh temperature (1000 DEG C) is used above
The harm that " boron is crisp " phenomenon causes to material military service performance.Additionally, adding the Al of certain content to exist to guarantee alloy in alloy
Possess excellent antioxidation and corrosion resistance under ultra-high temperature condition.
6th, tube material of the present invention possesses good combination property and structure stability, precipitated phase chi under the conditions of prolonged heat exposure
Very little change is little, transgranular no obvious Second Phase Precipitation, and no New phase formation.Alloy divides in 1000 DEG C and 1100 DEG C of yield strengths
Not Gao Yu 90MPa and 45MPa, when 1050 DEG C oxidation rate be less than 1.8 × 10-11g2cm-4s-1.It is particularly well-suited to ethylene production
In the superhigh temperature (more than 1000 DEG C) such as cracking furnace pipe under the conditions of life-time service part, also apply be applicable in thermal power generation unit
The parts such as the centrifuge in coal burner nozzle, glass fiber industry, and the part that some temperature are relatively low, such as hydrogen manufacturing turns
Change boiler tube, nuclear power generating sets PWR steam generator pipe heat pipe and thermal power unit boiler reheater etc..
Brief description
Fig. 1 is embodiment 1 alloy Analysis on Microstructure figure.
Fig. 2 is embodiment 1 alloy structure.
Fig. 3 is the element EDS point analysiss result at A in Fig. 2.
Fig. 4 is the element EDS point analysiss result at B in Fig. 2.
Specific embodiment
With reference to embodiment, the present invention is described in further detail.
Embodiment 1
The high temperature alloy cast tube material of the present embodiment, includes by mass percentage:C:0.2%, Cr:6%, Ni:24%,
Co:3.0%, Mn:0.3%, Si:0.2%, W:5.0%, Al:15%, Ti:2.5%, Nb:1.5%, B:0.5%, balance of
Fe.
The preparation method of the present embodiment comprises the following steps:
1) preparation of raw material:Composition includes by mass percentage:C:0.2%, Cr:6%, Ni:24%, Co:3.0%, Mn:
0.3%, Si:0.2%, W:5.0%, Al:15%, Ti:2.5%, Nb:1.5%, B:0.5%, balance of Fe.
2) melting step:The alloy of preparation is melted by all elements in addition to Si and Mn in mentioned component using induction furnace
It is smelt alloy mother solution, molten steel reaches more than 1500 DEG C and adds silicon and manganese deoxidation afterwards, and controls the quality of P, S impurity element in mother solution
The equal < of degree 0.03%, cast of subsequently coming out of the stove after molten steel temperature reaches 1650 DEG C.
Embodiment 2
The high temperature alloy cast tube material of the present embodiment, includes by mass percentage:C:0.5%, Cr:25%, Ni:20%,
Co:3.0%, Mn:0.1%, Si:0.3%, W:7.5%, Al:5%, Ti:0.5%, Nb:1.5%, B:0.9%, balance of Fe.
The preparation method of the present embodiment comprises the following steps:
1) preparation of raw material:Composition includes by mass percentage:C:0.5%, Cr:25%, Ni:20%, Co:3.0%, Mn:
0.1%, Si:0.3%, W:7.5%, Al:5%, Ti:0.5%, Nb:1.5%, B:0.9%, balance of Fe.
2) melting step:The alloy of preparation is melted by all elements in addition to Si and Mn in mentioned component using induction furnace
It is smelt alloy mother solution, molten steel reaches more than 1500 DEG C and adds silicon and manganese deoxidation afterwards, and controls the quality of P, S impurity element in mother solution
The equal < of degree 0.03%, cast of subsequently coming out of the stove after molten steel temperature reaches 1630 DEG C.
Referring to table 1, the alloy material high-temperature behavior of embodiment 1-2 is tested respectively it is seen that alloy is in 1000-
Possess excellent elevated temperature strength performance and antioxygenic property in the range of 1100 DEG C.Beta alloy is pressed in 1000 DEG C and 1100 DEG C
Contracting yield strength is respectively higher than 90MPa and 45MPa, and when 1050 DEG C, oxidation rate is less than 1.8 × 10-11g2cm-4s-1.
Table 1 embodiment 1 and 2-in-1 gold high-temperature behavior test result
Referring to Fig. 1, embodiment 1 alloy microstructure morphology is observed it can be seen that except Ovshinsky in alloy structure
Body presence biphase with chromium carbide is outer, also there is white chunks thing phase in grain boundaries and black shaft phase exists.Referring to Fig. 2, Fig. 3
And Fig. 4, two kinds of thing phases are carried out with EDS spot scan analysis, it is found that white thing phase is to have Nb, Ti enrichment of element, should be
Nascent MC type richness Nb, Ti carbide.There are Nb, Ti, B to be enriched with black thing phase, show that it is mainly boride.
Embodiment 3
The high temperature alloy cast tube material of the present embodiment, includes by mass percentage:C:0.4%, Cr:20%, Ni:25%,
Co:0.5%, Mn:0.2%, Si:0.1%, W:6.0%, Al:10%, Ti:1%, Nb:1%, B:1.0%, balance of Fe.
The preparation method of the present embodiment comprises the following steps:
1) preparation of raw material:Composition includes by mass percentage:C:0.4%, Cr:20%, Ni:25%, Co:0.5%, Mn:
0.2%, Si:0.1%, W:6.0%, Al:10%, Ti:1%, Nb:1%, B:1.0%, balance of Fe.
2) melting step:The alloy of preparation is melted by all elements in addition to Si and Mn in mentioned component using induction furnace
It is smelt alloy mother solution, molten steel reaches more than 1500 DEG C and adds silicon and manganese deoxidation afterwards, and controls the quality of P, S impurity element in mother solution
The equal < of degree 0.03%, cast of subsequently coming out of the stove after molten steel temperature reaches 1650 DEG C.
Embodiment 4
The high temperature alloy cast tube material of the present embodiment, includes by mass percentage:C:0.5%, Cr:24%, Ni:22%,
Co:1%, Mn:0.5%, Si:0.5%, W:6.5%, Al:6%, Ti:1.5%, Nb:1.2%, B:0.75%, balance of Fe.
The preparation method of the present embodiment comprises the following steps:
1) preparation of raw material:Composition includes by mass percentage:C:0.5%, Cr:24%, Ni:22%, Co:1%, Mn:
0.5%, Si:0.5%, W:6.5%, Al:6%, Ti:1.5%, Nb:1.2%, B:0.75%, balance of Fe.
2) melting step:The alloy of preparation is melted by all elements in addition to Si and Mn in mentioned component using induction furnace
It is smelt alloy mother solution, molten steel reaches more than 1500 DEG C and adds silicon and manganese deoxidation afterwards, and controls the quality of P, S impurity element in mother solution
The equal < of degree 0.03%, cast of subsequently coming out of the stove after molten steel temperature reaches 1650 DEG C.
Embodiment 5
The high temperature alloy cast tube material of the present embodiment, includes by mass percentage:C:0.3%, Cr:20%, Ni:20%,
Co:2%, Mn:0.4%, Si:0.4%, W:5.5%, Al:12%, Ti:2%, Nb:1%, B:0.75%, balance of Fe.
The preparation method of the present embodiment comprises the following steps:
1) preparation of raw material:Composition includes by mass percentage:C:0.5%, Cr:24%, Ni:22%, Co:1%, Mn:
0.5%, Si:0.0.5%, W:6.5%, Al:6%, Ti:1.5%, Nb:1.2%, B:0.75%, balance of Fe.
2) melting step:The alloy of preparation is melted by all elements in addition to Si and Mn in mentioned component using induction furnace
It is smelt alloy mother solution, molten steel reaches more than 1500 DEG C and adds silicon and manganese deoxidation afterwards, and controls the quality of P, S impurity element in mother solution
The equal < of degree 0.03%, cast of subsequently coming out of the stove after molten steel temperature reaches 1650 DEG C.
This tube material adopts intermediate frequency furnace melting, and directly uses under as cast condition.When military service working condition pressure is more than 5MPa, should
Tube material adopts vacuum induction melting, and is aided with electroslag remelting process preparation.
As-cast Microstructure of the present invention is mainly by austenitic matrix and the alternatively distributed carbide of dendrite circle and boride structure
Become.Wherein, boride accounts for volume fraction and is not less than 5%, Cr23C6Volume fraction is not less than 10%.Alloy high-temp prolonged heat exposure
Under the conditions of tissue stabilization, precipitate size change less, transgranular no obvious Second Phase Precipitation, and no New phase formation.This conjunction
Gold is respectively higher than 90MPa and 45MPa in 1000 DEG C and 1100 DEG C of yield strengths, and when 1050 DEG C, oxidation rate is less than 1.8 × 10-11g2cm-4s-1.
Claims (6)
1. a kind of boride strengthening tube material with low-cost high-strength it is characterised in that:This tube material composition presses quality hundred
Ratio is divided to meet following area requirement:C:0.2~0.5%, Cr:5~25%, Ni:20~25%, Co:0.5~3.0%, Mn:
0.1%~0.5%, Si:0.1%~0.5%, W:5.0%~7.5%, Al:5~15%, Ti:0.5~2.5%, Nb:1.0~
1.5%, B:0.5~1.2%, balance of Fe.
2. a kind of boride strengthening tube material with low-cost high-strength according to claim 1 it is characterised in that:B
Meet B/C=1.5~2.5 with the mass percent of C, and when Al mass percent is less than 7%, Cr mass percent is not less than
22%.
3. a kind of boride strengthening tube material with low-cost high-strength according to claim 1 it is characterised in that:Should
The as-cast structure of tube material is mainly made up of with boride the alternatively distributed carbide of austenitic matrix and dendrite circle;Wherein, boron
Compound accounts for volume fraction and is not less than 5%, Cr23C6Volume fraction is not less than 10%.
4. a kind of boride strengthening tube material with low-cost high-strength according to claim 1 it is characterised in that:Should
Tube material is respectively higher than 90MPa and 45MPa in 1000 DEG C and 1100 DEG C of yield strengths, and when 1050 DEG C, oxidation rate is less than 1.5
×10-11g2cm-4s-1.
5. a kind of boride strengthening tube material with low-cost high-strength according to claim 1 it is characterised in that:Should
Tube material adopts intermediate frequency furnace melting, and directly uses under as cast condition.
6. a kind of boride strengthening tube material with low-cost high-strength according to claim 1 it is characterised in that:When
When military service working condition pressure is more than 5MPa, this tube material adopts vacuum induction melting, and is aided with electroslag remelting process preparation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610829488.8A CN106467955A (en) | 2016-09-18 | 2016-09-18 | Boride reinforced pipe material with low cost and high strength |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610829488.8A CN106467955A (en) | 2016-09-18 | 2016-09-18 | Boride reinforced pipe material with low cost and high strength |
Publications (1)
Publication Number | Publication Date |
---|---|
CN106467955A true CN106467955A (en) | 2017-03-01 |
Family
ID=58230600
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201610829488.8A Pending CN106467955A (en) | 2016-09-18 | 2016-09-18 | Boride reinforced pipe material with low cost and high strength |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN106467955A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115011879A (en) * | 2022-06-23 | 2022-09-06 | 西北工业大学 | Austenitic heat-resistant steel and heat treatment method thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53108823A (en) * | 1977-03-07 | 1978-09-22 | Denki Jiki Zairiyou Kenkiyuush | Magnetic alloy with rectangular hysterisis loop and method of making same |
DE4210358A1 (en) * | 1992-03-30 | 1993-10-07 | Thyssen Edelstahlwerke Ag | Device for avoiding the mucous membrane and respiration of soot in the exhaust gas of diesel engines |
CN1179477A (en) * | 1997-08-18 | 1998-04-22 | 冶金工业部钢铁研究总院 | High-aluminium austenic heat resistant steel |
CN101886230A (en) * | 2010-05-18 | 2010-11-17 | 泰州市永昌冶金设备有限公司 | High temperature steel |
-
2016
- 2016-09-18 CN CN201610829488.8A patent/CN106467955A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53108823A (en) * | 1977-03-07 | 1978-09-22 | Denki Jiki Zairiyou Kenkiyuush | Magnetic alloy with rectangular hysterisis loop and method of making same |
DE4210358A1 (en) * | 1992-03-30 | 1993-10-07 | Thyssen Edelstahlwerke Ag | Device for avoiding the mucous membrane and respiration of soot in the exhaust gas of diesel engines |
CN1179477A (en) * | 1997-08-18 | 1998-04-22 | 冶金工业部钢铁研究总院 | High-aluminium austenic heat resistant steel |
CN101886230A (en) * | 2010-05-18 | 2010-11-17 | 泰州市永昌冶金设备有限公司 | High temperature steel |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115011879A (en) * | 2022-06-23 | 2022-09-06 | 西北工业大学 | Austenitic heat-resistant steel and heat treatment method thereof |
CN115011879B (en) * | 2022-06-23 | 2024-02-06 | 西北工业大学 | Austenitic heat-resistant steel and heat treatment method thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN105112728B (en) | Heat-resisting alloy for 700-DEG C ultra-supercritical steam turbine rotor and preparation method thereof | |
CN108315599A (en) | A kind of high cobalt nickel base superalloy and preparation method thereof | |
CN102330035B (en) | Heat resistant steel, and heat resistant steel pipe and manufacturing method thereof | |
CN109321831B (en) | Martensite heat-resistant cast steel material for ultra-supercritical steam turbine and preparation method thereof | |
CN102162049B (en) | Nickel-base alloy material for super-supercritical steam turbine and preparation method thereof | |
CA2955322C (en) | Ni-based superalloy for hot forging | |
CN104195474B (en) | High-temperature-resistant alloy casting and preparation method thereof | |
CA2955320A1 (en) | Ni-based superalloy for hot forging | |
JP2023530808A (en) | Heat-resistant steel for steel pipes and castings | |
CN110643896A (en) | Ultra-supercritical high-nitrogen martensite cast steel and preparation method thereof | |
CN107841657B (en) | High-strength and high-toughness Ni-Cr-Mo-based casting alloy | |
CN106756509A (en) | A kind of high-temperature alloy structural steel and its Technology for Heating Processing | |
CN116949348A (en) | Martensitic heat-resistant steel and smelting method thereof | |
CN105331905A (en) | Novel non-magnetic stainless steel and preparation method thereof | |
CN114182140A (en) | Tantalum-containing cast nickel-based high-temperature alloy for 700 ℃ unit and preparation method thereof | |
US20030185700A1 (en) | Heat-resisting steel and method of manufacturing the same | |
CN106929710B (en) | Ultra-supercritical steam turbine rotor high-strength and high ductility heat-resisting alloy and preparation method thereof | |
CN106467955A (en) | Boride reinforced pipe material with low cost and high strength | |
CN102703835A (en) | Hot-work die steel for aluminum die-casting mould | |
CN114645159B (en) | High-temperature oxidation-resistant high-strength nickel-tungsten-cobalt-chromium alloy and preparation method thereof | |
CN109355585A (en) | A kind of superelevation nitrogen martensite heat resisting cast steel and preparation method thereof | |
CN102312159A (en) | Heat treatment process of martensite wear-resistant cast steel | |
CN114635094B (en) | Martensitic stainless steel for valve body and preparation method thereof | |
CN106399758A (en) | Pipe material with excellent high-temperature strength and stability | |
CN105734344A (en) | Nickel-based alloy with excellent comprehensive high temperature performance and production technology of nickel-based alloy |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170301 |
|
WD01 | Invention patent application deemed withdrawn after publication |