JPS5925942A - High strength cast ni alloy having superior characteristic at high temperature - Google Patents

Abstract

PURPOSE:To obtain a cast Ni alloy having superior corrosion resistance, oxidation resistance and strength in a combustion atmosphere at high temp. by adding specified percentages of Cr, Fe, W, Mo and other elements to Ni. CONSTITUTION:A cast Ni alloy having a composition consisting of 0.55-2.0% C, 10-28% Cr, 1-30% Fe, 0.1-9.0% W, 0.1-8.0% Mo, 0.01-4.5% Ti, 0.01- 4.5% Al and the balance Ni is used as a material for mechanical equipment used in a highly corrosive and oxidative atmosphere at high temp. formed by burning solid, liq. or gaseous fuel. To said composition may be added a specified amount of Si, Mn, N, Nb and/or Ta, B and/or Zr, or a mixture thereof. The Ni alloy has superior strength, corrosion resistance and oxidation resistance in a combustion atmosphere at high temp.

Description

Detailed Description of the Invention The present invention has excellent high-temperature corrosion resistance, high-temperature oxidation resistance, and high-temperature strength, and is particularly applicable to heavy oil, coal, natural gas,
Combustion of blast furnace gas, coke oven gas, converter gas, etc.
This relates to a high-strength 1<1 casting alloy with excellent high-temperature properties suitable for use in 41"f construction parts exposed to ambient air.

In general, steel heating furnaces, petrochemical heating furnaces, and yl? l
Petroleum and coal are used as fuel in filament and heating reaction equipment such as kilns in the ceramics industry.

Furthermore, it is well known that natural gas, blast furnace gas, coke oven gas, converter gas, etc. are used.

Conventionally, among the members constituting these heating reaction devices, members particularly exposed to the combustion atmosphere, such as the skid hardware of a copper phase heating furnace, the reaction tube of an oil chemical heating furnace, its support fittings and burner chips, and the diffuser of a boiler. The combustion atmosphere reaches a high temperature of 700 to 1250°C and contains extremely corrosive and oxidizing vanadium arsenic acid and sulfuric acid arsenic acid, so it is difficult to manufacture such parts. Be''e-25%Cr- has corrosion resistance and acid IIS resistance in the combustion atmosphere of
20%Ni alloy, Fe-30%Cr-22%N] alloy,
and Fe-, Fe such as 28% Cr alloy;! l￥Heat-resistant alloys and C.

Co-based heat-resistant alloys such as -28%Cr-20%N1 alloy (UMCo50) are used.

However, with the recent advances in technology, the operating conditions for heating reactors are becoming increasingly severe. Under such harsh conditions, t' + i The alloy does not exhibit satisfactory high-temperature corrosion resistance, high-temperature oxidation resistance, and high-temperature strength 1y, while the Co-based heat-resistant alloy has relatively satisfactory properties but is high in cost due to the high content of expensive Co. Therefore, the range of its use is limited, and from this point of view, it is possible to use an inexpensive material that exhibits excellent corrosion resistance and oxidation resistance, and has a high strength of 61.1 (strength), especially in a combustion atmosphere. There was a strong desire to develop materials.

This invention was developed from the viewpoints mentioned above.
In % of heavy use, C: 0.5.5~'d, 0%, Cr1O
~28% less than 6Wa, I”e:, 1~30%, W:
O, 1~[J, 0%, Ivlo', 0. ]~8
．． 0%, '1. 'i: 0.01~4-. 5%.

AQ: (), Contains 01-4.5%, if necessary 1
R: 1°-0, 1-3.0% or Mn: 0.
Contains 1 to 2.0%.

1 inch as needed: O, OO5-02, N
b: 0.0] to 150%, Ta: 0.01 to 1.
50%, I3゜0.001-0.20%, and Zr:
One or more of O,0O1-0,20%”-
It has a composition in which the remainder is Nj and impurities, and has a high temperature of 100 to 1250°C, and is extremely corrosive and oxidizing, such as vanadium oxide and sulfuric acid. It is an inexpensive Ni-based cast alloy that exhibits excellent high-temperature corrosion resistance, high-temperature oxidation resistance, and high-temperature strength in a combustion atmosphere that contains metals.

The reason why the composition range of the 191-base casting alloy of the present invention is limited as described above will be explained.

(a) C The C component includes C10. Vil, I-0, Tl, N
b + and 'I' a, etc. to form 1V17c
3. It has the effect of forming carbides such as MC and 1v123C6 type to improve hardness (111Il abrasiveness) and further improve weldability and castability, but its content is less than 0.55%/ With a7a, the desired effect cannot be obtained in the above action, and on the other hand, when the content exceeds 20%, not only does the precipitation of the carbide increase, but the grain size of 7c becomes coarse and the toughness decreases. The content was determined to be 0.55% to 2% since it would not be able to withstand the thermal shock caused by rapid heating and cooling.

(b) Cr A part of the Cr component forms a solid solution in the base material, improving high-temperature corrosion resistance and high-temperature oxidation resistance, especially in a combustion atmosphere, and the remaining part forms carbides to increase hardness. It has the effect of improving high-temperature abrasion resistance by increasing the
If the content is less than 10%, the desired effect cannot be obtained, while if the content is more than 28%, the thermal shock resistance will decrease.
It was set as less than %.

(c) When contained in a predetermined amount, the I component exhibits the same effect as N1, so it is included as a partial substitute for the expensive Ni component for the purpose of cost reduction. If the content is less than 1%, the economic effect will not be sufficient, while if the content exceeds 30%, the high temperature strength will decrease, so the content was set at 1 to 30%.

(I W W component not only forms a solid solution with MO in the base material, but also combines with C to form carbide, thereby improving the high θ11 strength, high temperature hardness, and high temperature wear resistance). However, if the content is less than 0.1%, the desired effect cannot be obtained, while if the content exceeds 9.0%, it becomes hard and wear resistant.
However, on the other hand, the high temperature oxidation resistance, toughness, and thermal shock resistance were significantly deteriorated, so the content was set at 01 to 90%.

(e) M.

As described in Section 2, the Mo component forms a solid solution in the base material in coexistence with W, strengthens it, and forms carbides to improve high-temperature strength, high-temperature hardness, and high-temperature wear resistance. However, if the content is less than 0.1%, the desired effect cannot be obtained; on the other hand, if the content exceeds 80%, W
As in the case of components, high temperature oxidation resistance, toughness 1 and thermal shock resistance deteriorate, so the content was reduced to 01.
It was set at ~80chi.

(f)'1゛I The T1 component contains Will L, which suppresses the growth of crystal grains in the substrate.
Rather, it makes the crystal grains finer, and in addition to forming MC-type carbides and nitrides, it also combines with N1 and AC to form N
Forms an intermetallic compound of i3 (Δe, 'L'i), which improves high temperature strength, high temperature wear resistance (high temperature hardness), thermal shock resistance,
and has the effect of improving toughness, but its content is 0
If the content is less than 0.1%, the desired effect cannot be obtained, while if the content exceeds 4.5%, not only will the formation of carbides at high temperatures be promoted and the toughness will be reduced, but also the combustion atmosphere The formation of oxides becomes noticeable, causing deterioration of high-temperature corrosion resistance and high-temperature acid resistance.
The content of the paper was determined to be O,Q i ~45%.

(g) AI! In the AC component, in coexistence with Cr, there is a
・Improves oxidation resistance and corrosion resistance, and further improves oxidation resistance and corrosion resistance.
N] and T1 as shown below to form a compound, (ΔJTi
), it also forms nitrides to further improve wear resistance and heat shock resistance.
It has the effect of improving the stiffness and toughness, but the desired effect cannot be obtained if the content of S'', I?f is 0.01% uncrystallized, while on the other hand, if the content exceeds 45%, the desired effect cannot be obtained. If it is, the fluidity and castability of the melt will decrease, making it difficult to manufacture υj products, and the toughness and weldability will also decrease, making it impractical. 0.0
It was set at 1 to 45%.

(1+) 5j The S1 component, together with Cr, has the effect of improving high-temperature corrosion resistance and high-temperature oxidation resistance in a combustion atmosphere, as well as deoxidizing effect and the effect of improving the fluidity of molten metal to improve castability. In addition, it has the effect of improving high temperature resistance, so it is included when these properties are particularly required, but if its content is less than 0.1%, the desired effect will not be obtained. On the other hand, if it is contained in excess of 30%,
Since toughness and weldability decrease in relation to Cr, its content was determined to be 01 to 30%.

In addition, when using the S1 component as a deoxidizing agent, it may be contained in a range of less than 0.01% as an unavoidable impurity, but in this case, including the amount of an unavoidable impurity,
The total content may be 0.1% or more.

(i) Mn In addition to stabilizing austenite by solid solution in the base material, the Mn component has a deoxidizing effect, and also has the effect of improving 111iJ thermal shock resistance and high-temperature wear resistance (high-temperature hardness). These properties are particularly required because of the presence of nitric acid, but if the content is 0.1%, the desired effect cannot be obtained; If the content exceeds 01, the high temperature corrosion resistance and high 61h oxidation resistance tend to deteriorate.
It was set at ~20%.

In addition, 1~4nlノ! 2 minutes, same as the Sl component, Initrate 1
] As an avoidable impurity, there is a case where the total content is 0.1%, but in this case, the total content, including the free impurity, is 0.1%. All you have to do is adjust it accordingly.

(j) N The N component has the effect that a part of it dissolves in the austenite matrix and stabilizes it, while the remaining part forms metal nitrides and further improves the high temperature property jν. Therefore, it is included as necessary when high-temperature 1st stage is required, but if the content is less than 0.05%, the desired high-temperature strength improvement effect cannot be obtained, and if the content exceeds -0.02%. If it is contained, not only will the amount of nitrogen increase, but also the nitride particles will become coarser and brittle, and the thermal shock resistance will deteriorate, so the content should be reduced to 0. 005~02%
It was determined that

(k) Nb and Ta These components particularly suppress the growth of crystal grains in the substrate,
It also forms MC-type carbon compounds and nitrides to further improve high-temperature strength and high-temperature wear resistance (high-temperature hardness).
However, if the content is less than 0.01%, the desired effect cannot be obtained. On the other hand, if the content exceeds 15% of each, not only will the formation of oxides in the combustion atmosphere become significant, but
Since carbide precipitation in the alloy becomes too large and the toughness V1- and thermal shock resistance deteriorate, the respective contents were determined to be 0.01 = 1.5%.

(t) B and Zr These components have properties such as high-temperature strength, high-temperature wear resistance (high-temperature hardness), and thermal shock resistance, as well as high-temperature corrosion resistance and high-temperature acid resistance in a combustion atmosphere (further improving arsenic resistance). Because of its effectiveness, it is selectively included depending on the required properties, but
If the content is less than 1% of each of f7-0 and 0O, the desired two effects cannot be obtained, while if the content exceeds 02% of each, the toughness will be improved.

11111 Atsui J Geki, Casting/Same Name 1 and Weldability tends to deteriorate, so the content of each fabric was determined to be 0.001 to 02%.

At the same time, the matrix textured alloy of the present invention will be explained by way of examples and in comparison with comparative examples.

Example 1ll-1 Using a conventional high-frequency melting furnace, molten metals having the compositions shown in Table 11 were melted in the air, and then cast into sand molds to form alloys 1 to 1 of the present invention. 54. Comparative casting alloys 1~]3. Various test pieces of conventional casting alloy 1.2 were manufactured, and hardness measurement tests were conducted using these test pieces.

A tensile test, and a vananium oxide test were conducted to evaluate high-temperature corrosion resistance in a combustion atmosphere and high-temperature acid resistance (arsenic resistance).

In addition, in the hardness test, the Vickers hardness was measured at room temperature and 1100°C, and in the tensile test, the Vickers hardness was measured at 7711'
1. Tensile strength at 800℃ and 1000℃1
02% proof stress and elongation were measured. Furthermore, the vanadium attack resistance test was conducted using the corrosion method (85% V2
o, +15% Na25o4) to the test piece at 20 my/
800'C and 900'C, respectively.
20 hours and 3 hours, respectively, in a vertical electric furnace heated to
This was done by measuring the corrosion loss after heating for 1+-44 hours. The results of these measurements are shown in Table 2.

From the results shown in Table 2, the present invention casting alloys 1 to 54 all have compositions corresponding to the above-mentioned Fe-based heat-resistant alloys and CO-based heat-resistant alloys.
It is clear that it has superior room temperature and high temperature hardness, room temperature and high temperature strength, and vanadium attack resistance. On the other hand, as seen in comparative υj gold-forming alloy ~13, the content of any one of the 11'7i components (those with a mark in Table 1) is If it deviates from the scope of the present invention, at least one of the characteristics of -1-traveling property will be inferior.

As mentioned above, the 1-sulfur based casting alloy of the present invention has an excellent high ffi+ in a high-temperature combustion atmosphere containing extremely corrosive and oxidizing oxides such as vanadium oxide and sulfur oxide. 't 1llll monophagous.' -J
: Shows iJ' high 1"Nr oxidation resistance, and has excellent high temperature strength, high II [1h resistance 1'i'j Jim;'I raw (high temperature hardness), thermal shock resistance 5 and toughness. Therefore, petroleum, coal, natural power, and even fuels from various smelting furnaces and coke ovens are used as fNIili 11 heating furnaces and petrochemical heating furnaces.

In addition, it exhibits excellent performance when used in the production of boilers, cement, and kiln furnaces in the ceramics industry, especially those that are exposed to the combustion atmosphere of the above-mentioned fuels A and I. .

Applicant: Mitsubishi Metals Corporation

Claims (1)

[Claims] (1) C: 0.55 to 2.0%, Cr: 10-2
Less than 8%, p'e: 1-30%, W: 01-9.0%,
Mo'. 0'' ~ 80%, Ti: 0.01 ~ 45%
, AC, O○ ]~45%, the rest is N1
A high-strength N1-base casting alloy with excellent high-temperature properties exhibiting excellent high-temperature corrosion resistance and high 7□i,^oxidation resistance in a combustion atmosphere, characterized by having a composition (by weight %) consisting of and impurities. . (2) C:O55-20%, Cr:0-28% if not
! /L Ii'e: 1-30%, W: 0.1
~9.0%, ↑VIO01~8.0%, 'l'j,
: Contains 0.01 to 45%, Ae: 0.01 to 45%, and Si: 0.1 to 30%, the rest being N1 and
A high-strength N1-base casting alloy with excellent high-temperature properties and exhibiting excellent high-temperature corrosion resistance and high-temperature oxidation resistance in a combustion atmosphere, characterized by having a composition (the above weight %) consisting of J-evacuated impurities. (3) C: 0.55 to 2.0%
, Cr: Soil O-28% or less, Fe: 1
~30%, W: 0.1~9.0%, 1x4o:O
1-80%, 'l'i: 0.01-4.5, A
The composition contains Q: 0.01 to 45%, Mn: 0.1 to 20%, and the remainder is N1 and unavoidable impurities (hereinafter referred to as -
1-weight 11, which exhibits excellent high-temperature corrosion resistance and high-temperature oxidation resistance in a combustion atmosphere. l11
11 High strength ON single cast alloy with excellent properties. (41C: 0.55-2.0%, Cr: 10-
28% unQ, Fe: 1--30%, W:
0.1~9.0%, M(1:0, 1~8.0%, 'J
'i: 0.01-45%, Ai! :o, o1~45%
and further contains N: 0.005-02%, with the remainder consisting of N1 and unavoidable impurities (hereinafter referred to as "double weight %")
A high-strength Ni-based υ,j alloy with excellent high-temperature properties and exhibiting excellent high-temperature corrosion resistance and high-temperature oxidation resistance in a combustion atmosphere, characterized by having the following properties: (5) C: 0.55-2.0%, Cr:lQ ~
28% un2i4i, Fe: 1-30%, W:
0.1~9.0%, Mo: 0''~80, T
j,: 0.0 1-45%, ΔM: 001-45
%, and S1', 0.1 to 3.0%, S'1
) VCN:0005~02%, with the remainder consisting of Ni and unavoidable impurities (hereinafter referred to as -1% by weight).It has excellent corrosion resistance and high temperature resistance in a combustion atmosphere. High-strength Ni-based casting alloy with excellent high-temperature properties that exhibits oxidation resistance. (6) C: 0.55 to 2.0%
, Cr: less than 10-28%,
jj'e: ]~30%, W: O,i~9
．． 0%, 1001~80%, Ti: 0.01~
4.5%, AQ:O, 04-45%, and Mn 0
1 to 20%, and further N: 00 (115 to 02
%, with the remainder consisting of 1 odor and 11j impurities (hereinafter referred to as "dual weight %"). High strength J41 base υJ alloy. (Force C: 0.5.5-2.0%, Cr: 10-28%
Less than j-'e,' L □ 30%, W: 0
．． 1 to 9.0%, Mo: [, ), i to 8.0%,
Ti: 0.01-4.5%, JV: O○ Co-
45%, followed by Nb:O, 01-15% and 1. 'a: A combustion characterized by having a composition (hereinafter referred to as "double weight %") containing one or two B of O, O, 1 to 15%, and the remainder consisting of Nj and non-11j impurities. A high-strength N-base alloy with excellent high-temperature properties that exhibits excellent high-temperature corrosion resistance and high-temperature oxidation resistance in the atmosphere. (8) C: 0.55-2.0%, Cr:'',
O~28% not fM+ Ti'e: 1~30%, W
:01~9.0%, 1vlo:01~80%, '1'
l: 0.01-4.5%, AC0001-45%, and Si: 0.1-30%, further Nb:
O, O engineering ~1. ．． 5% J two 'I'a: 0.0
Excellent high-temperature corrosion resistance in a combustion atmosphere and high-temperature corrosion resistance characterized by having a composition (hereinafter referred to as "double weight %") containing one or two of the elements 1 to 1.5, with the remainder consisting of Nj and unavoidable impurities. High strength 1F with excellent high temperature properties showing oxidation resistance
fi N ] base υj-forming alloy. (9) C: 0.55-2.0%, Cr: 10-2
8% un41♂d, Fe', 1-30%, W
: 0.1-9.0%, Mo, 0, ]-8. O%, Tj
20, 01-4. ．． 5%, AQ: 0.01-45%, and Mn: O, E, ~20%, including J old): 0.01-1.5% and Ta, 001-15
Contains one or two of the following, with the rest being Ni and Non-7.
A high-strength 1-size product with excellent high-l crystal properties that exhibits excellent high-temperature corrosion resistance and high-temperature oxidation resistance in a combustion atmosphere, characterized by having a composition consisting of avoidable impurities (hereinafter -1% by weight)
Base casting alloy. (10) C: 0.55-2.0%, Cr: l
O~28% not/l:t], D”e:
l~30%, W:
0.1~'9.0%, MO:0]~80%
, 'I'1. : 0.01-4.5%, u:oo1
~45%, and further contains one or two of B:O,001~02% and Zr:0.00~02%, with the remainder consisting of Ni and unavoidable impurities (hereinafter referred to as "
1. High strength with excellent high-temperature properties, exhibiting excellent high-temperature corrosion resistance and high-temperature oxidation resistance in a combustion atmosphere, characterized by having - heavy M%). Ii-based υj alloy. (], 1) C: 0.55-2.0%, Cr: 10-
28% ii: 4, F'e: 1-30%,
W: 0.1~9.0%+M(1:0]~80%,
'I'l: 0.01-4.5%, At! :0. O
1 to 4.5%, and Si: 0.1 to 3.0%, and further B: 0. OOl~0.2% and Zr:
Contains one or two of O, OO'1 to 0.2, and the remainder is 1. A high-strength Ni-based cast alloy with excellent high-temperature properties and exhibiting excellent high-temperature corrosion resistance and high-temperature oxidation resistance in a combustion atmosphere, characterized by having a composition (by weight %) consisting of Li and non-J-evacuated impurities. (12 ) C: 0.55-2.0%, Cr', 1
0 to less than 28%, Fe: ] to 30%, W: 0
．． 1-9.0%, Mo: 01-80%, 'I'l:
0.01~4.5%, Ag,: Q, 01~45
%, and Mn '01 to 20%, and further B:
O,0O1-0,2% and Zr: 0.001-0.
Contains one or two of the following two elements, with the remainder consisting of N1 and unavoidable impurities; A high-strength N1 base casting alloy with excellent high-temperature properties. (13) C: 0.55-2.0%, Cr: 10
~Less than 28%, Fe: 1~30%, W: 0.1~
9.0%1MO゛01~80%, 'l'l: 0.0
1 to 4.5%, Ae: O○l to 4.5%, further N: 0.005 to 02%, and Nb: 0.01
~1.5% and one or two of 'I'a: O○'~'5%, with the remainder consisting of N1 and impurities (the above circumstances %). A high-strength single-line cast alloy with excellent high-temperature properties that exhibits excellent high-temperature corrosion resistance and high-temperature oxidation resistance in a combustion atmosphere characterized by: (14) C: 0.55-2.0%, Cr: 1
0 to 28% + I"e 30%, W: 01 to 9.0%,
M(1.01~8.0%, Tj,: 0.01~4.5%, A
i! :001 to 45, and Si:0.1 to 30%, further N:0.005 to 02%, and Nl):0
．． 01-15% O'nibi'a: 0.01-1.5
Excellent high-temperature corrosion resistance and high-temperature oxidation resistance in a combustion atmosphere, characterized by having a composition (wt%) containing one or two types of N1 and the remainder consisting of N1 and unavoidable impurities (wt%). A high-strength N1-based υj alloy with excellent high-temperature properties. (], 5) C: 0.55-2.0%, Cr: 1
0~28% un11j7a, Fe: 1~30%
, W: 0.1-9.0%, Mo: 0]-80%
, Ti: 0.01-4.5%, Ai! :0.01~45
%, and lφn: 0.1 to 20%, and N: 0.005 to 02%, and Nb: 0.01 to 15%.
and Ta: 0.01 to 15%, and the remainder is Ni and unavoidable impurities (
A high-strength J-negative base cast alloy having excellent high-temperature characteristics and exhibiting excellent high-temperature corrosion resistance and high-temperature oxidation resistance in a combustion atmosphere, characterized by having a double weight ratio of 4% by weight or less. (16) C: 0.55-20%, Cr: ],
O~less than 28%+Ii'e: 1~30%, W
: 0.1-9.0%, M. 0, 1~80%, 'ri: 0.01~45%, ΔQ
Contains O1○~45cl), and further contains Ne0005~
02%, B:0001~0.2% and Zr:O,
of 1 to 0.2% of OO] or two species,
The remainder is N] and unavoidable impurities (weight)
A high-strength Ni-based cast alloy with excellent high-temperature properties and exhibiting excellent high-temperature corrosion resistance and high-temperature oxidation resistance in a combustion atmosphere, characterized by having: (17) C: 0.55-2.0%, Cr: 1
0 to less than 28%, F'e: Co-~3
0%, W: 01-90%, M
O: 01-80%, Ti: 0.01-45, JV: 0
．． Contains 45% of 0cor, and Si: 0.1 to 30%, and further contains N: 0.005 to 02%, and 3.0001 to 0.
．． 2% and Zr:0. Excellent high-temperature corrosion resistance and high-temperature acid resistance in a combustion atmosphere, characterized by having a composition (weight %) containing one or two of OO 1 to 0.2%, with the remainder consisting of N1 and unavoidable impurities. A high-strength 1-size 1-base ν1-made alloy with excellent acid pain 1 properties that show oxidation resistance. (1B) C: 0.55-2.0%, Cr: lo ~
28% not i'i! 1! I, ll'e: 1-30%
, W: 0.1-9.0%, IVIO: 0
~80%, ],'i: 0.0
1 to 45%, Ae: 0.01 to 45%, and Mn: 0.1 to 2.0%, and further N: 0.
．． 005-02%, B: 0.001-02% and Z
r: A combustion atmosphere characterized by containing one or two of O, 001 to 02%, and the remainder consisting of Ni and non-T avoidable impurities. High-strength N base casting alloy with excellent high-temperature properties and excellent high-temperature corrosion resistance and high-temperature acid resistance. ('', 9) C: 0.55-2.0%, Cr: 1
0~28% i1!71i, Fe: 1~30
%, W: 0.1~9.0%, Mo': 01~
Section 80, Ti: 0.01-45%, /V: 0.0i
~45%, and further contains one or two of Nb: 001~15% and J'a: 001~1.5%, B: O, OOl ~0.2%, and Zr: 0. ．．
Containing one or two types of 001-0.2 candy,
The remainder consists of N1 and unavoidable impurities (hereinafter, 1-fold M)
A high-strength single-base casting alloy with excellent high-temperature properties that exhibits excellent high-temperature corrosion resistance and high-temperature oxidation resistance in a combustion atmosphere, characterized by curing (%). (20) C: 0.55-2.0%, Cr: 10
~Less than 28%, Fe: 1-30%, w: O
,] ~9.0%7M0101~80%, Ti: 0
．． 0 ] ~ 4.5%, AI! : 0.01 to 45%, and Si: 0.1 to 30%, and further Nb: 00
1-1.5% and Ta: 0.01-15%
13:0.001 to 02% and Zr: 0.001 to 02%], with the remainder consisting of Ni and unavoidable impurities (hereinafter referred to as weight). (21) A high-strength Nj-based casting alloy with excellent high-temperature properties that exhibits excellent high-temperature corrosion resistance and high-temperature oxidation resistance in a combustion atmosphere, characterized by having a : ],
O~less than 28%, Fe: 1~30%, W
: O, ] ~ 9.0%, Mo: 0, 1 ~ 8.0%, T
i: 0.01-4.5%, AQ: 0.01-45%
, and Mn: 01 to 20%, and further contains Nb
: 0.01-1.5% and 'I'a: 0.01
~1.5 with one or two types and 13:o, 00
Parts 1 to 02 and Zr: l of 0.001 to 02%
It has an excellent high-temperature corrosion resistance in a combustion atmosphere and a high corrosion resistance in a combustion atmosphere. 'r1'
+High A17 showing oxidation resistance, acidic IX with excellent characteristics
Nj base casting alloy.・(22), C: 0.55-2.0%, Cr: ]
, OO~28% end 4Wa, Ii'e:
1 to 30%, W 20, 1 to 9
．． 0%, M. 0, 1-8', 0%, Tl:
0. Ol~4. 5%, A+! :O
, C) 1 to 45%, and further N: 0.005 to 0
2%, Nl): 0.01-1.5% and Ta:
0.01~], 5% of one or two types,
B: O, OO, L~0.2% and 7. r:0.001
0.02% or 2x carbon dioxide, with the remainder consisting of Ni and unavoidable impurities (heavily concentrated in Li); A high-strength N]-based cast alloy with excellent high-temperature properties and high-temperature oxidation resistance t/l+. (23) C: 0.55-2.0%, Cr: 10
-28% not '1rla, pe: 1-30%, W
: 0.1~! l), 0%, old: 0, 1-8.0%,
'I'1: 0.01-4.5%, Ai! :0.0
1 to 4.5%, and Si: 0.1 to 30%,
Furthermore, N: 0.005 to 0.2% and Nb: 0
．． 01-], 5% and I'a: 0.01-15%, and B: 0.01-15%. Excellent in a combustion atmosphere characterized by having a composition (weight %) containing 1 to 0.2% OO and one or two of 0001 to 02% Zr, with the remainder consisting of N1 and unavoidable impurities. A high-strength Ni-based cast alloy with excellent high-temperature properties that exhibits high-temperature corrosion resistance and high-temperature oxidation resistance. (24) C: 0.55-2.0%, Cr: 10
~28% less'$f4. Fe: 1-30%, W
: 0.1-9.0% 9MO: 01-80%, Ti
: 0.01-4.5%, At! :0.01~45%,
and Mn: 0.1 to 2.0%, and further N
:o, oo! 5~o, 2! % and Nb: 0.01~
]-, 5% and one or two of Ta: 0.01 to 15%, B: O, OOl ~ 0.2% and Z
r: 0.001 to 0.02%, and the remainder is Nj and impurities to avoid impurities (weight %). A high-strength N1-base casting alloy with excellent high-temperature characteristics V1 that exhibits corrosion resistance and high-temperature oxidation resistance.