JP2010037577A - Die component for molding resin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a die component which is used for molding a resin, particularly, a fluororesin and a polyphenylene sulfide resin, and is less in wear. <P>SOLUTION: The component of a die for molding a resin has a component composition comprising by mass, 10 to 25% Cr, >20 to 25% Mo, >0.8 to 4% Ti, 0.001 to 0.04% N, 0.05 to 0.5% Mn, 0.001 to 0.05% Mg, >0.1 to 1.0% Fe, 0.01 to <2.0% Si, 0.01 to <1.5% Al, 0.01 to 0.3% V and 0.0005 to 0.002% B, and if required, further comprising one or more selected from (a) 0.5 to 4% Cu, (b) one or two selected from 0.5 to 3% Nb and 0.5 to 3% Ta and (c) 0.1 to 1% W, and the balance Ni with inevitable impurities, and in which the content of C included as inevitable impurities is regulated to ≤0.05%. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a mold member that is low in consumption and excellent in corrosion resistance for molding a resin, particularly a fluororesin or a polyphenylene sulfide resin (hereinafter referred to as a PPS resin).

In general, as a mold member for molding a resin, Ni: 20 to 65% (% indicates mass%. The same applies hereinafter), Cr: 10 to 39%, Mo: 0.1 to 10%, C: 0 0.5 to 2.5%, Al: 0.01 to 4.5%, W: 0.1 to 10%, Mn: 0.1 to 2%, Si: 0.1 to 3%, As required, Nb: 0.01 to 1.5%, Ti: 0.01 to 4.5%, Zr: 0.001 to 0.2%, B: 0.001 to 0.2%, Ta: Ni—Cr containing one or more of 0.01 to 1.5%, Co: 1 to 10%, N: 0.005 to 0.5%, the balance being Fe and inevitable impurities -Mo-W type alloys are known (see Patent Document 1).
Furthermore, molds for compacting raw materials such as powders and granules containing corrosive substances such as acidic powders into tablets such as pharmaceuticals, quasi-drugs, cosmetics, agricultural chemicals, feed and food As a member for carrying out, it contains Cr: 25-60%, Al: 0.1-10%, and at least one element selected from Si, C, Mn, Mg, Ti and B is 0.8. The composition is such that Fe, V, Co, Cu, W, Mo, Ta, Nb, O, N, etc. contained as inevitable impurities are adjusted to 0.1% or less. Ni-Cr-Al-based alloy having a Si content is known, and it is considered that 0.002% of Si is mixed as SiO ₂ in this Ni-Cr-Al-based alloy (see Patent Document 2). .
Further, as a mold member used for constant temperature forging of a super heat resistant alloy forged in a mold heated to a high temperature, Al: 0.8-7%, Ti: 0.8-7%, Mo: 13- 25%, Cr: 8-16%, Ta: 1.1-8%, Si: 2.5% or less, Mn: 3% or less, N: 0.0001-0.1%, C: 0.1% In addition, Fe: 0.01 to 6%, B: 0.001 to 0.1%, Zr: 0.001 to 0.1%, Ca: 0.001 to 0.1 as necessary %, Co: 0.1 to 5%, V: 0.1 to 0.5%, W: 0.1 to 4%, Nb: 0.1 to 1%, Hf: 0.1 to 2%, Cu : A mold member made of a Ni-based alloy containing one or more of 0.1 to 2% and the balance of Ni and inevitable impurities is known (see Patent Document 3). ).
Japanese Examined Patent Publication No. 62-14214 JP 2001-62594 A JP-A-8-3665

In recent years, various types of resins have been molded, and resins that generate highly corrosive hydrogen fluoride during molding, such as fluororesins, have also been molded. In addition, a resin that generates sulfuric acid due to a gas containing a sulfur compound such as SOx and H ₂ S when it is heated and melted during molding like a PPS resin has been molded. However, when molding a resin, particularly a fluororesin or a polyphenylene sulfide resin (hereinafter referred to as PPS resin) using a conventionally known mold made of a Ni-based alloy such as a Ni—Cr—Al-based alloy, Since Ni—Cr—Mo—W alloys and Ni—Cr—Al alloys have poor corrosion resistance to gases containing hydrogen fluoride and sulfur compounds, conventional Ni—Cr—Mo—W alloys and Ni—Cr— Molding molds made of Ni-based alloys such as Al-based alloys are severely consumed, and there is a drawback that the life of the mold is shortened compared to before. In particular, nozzles for supplying the resin to the mold, screws for extruding the resin, extrusion pins, backflow prevention valves and other mold accessory parts are used under more severe conditions and are therefore quickly consumed. In order to improve this, there has been a demand for a resin mold member having further excellent corrosion resistance.

Accordingly, the present inventors have intensively studied to obtain a resin mold molded member made of a Ni-based alloy having excellent corrosion resistance, in which the mold is not consumed even when a resin, particularly a fluororesin or a PPS resin is molded. Went.
As a result, Cr: 10 to 25%, Mo: 20 to 25%, Ti: 0.8 to 4%, N: 0.001 to 0.04%, Mn: 0.05 to 0% by mass 0.5%, Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5% V: 0.01 to 0.3%, B: 0.0005 to 0.002%, and if necessary, (a) Cu: 0.5 to 4%,
(B) one or two of Nb: 0.5-3% and Ta: 0.5-3%,
(C) W: one or two of 0.1 to 1%,
One or more of the above (a) to (c) are contained, the balance is composed of Ni and inevitable impurities, and the component composition is adjusted so that the amount of C contained as inevitable impurities is adjusted to 0.05% or less. The Ni—Cr—Mo alloy has almost the same hardness as a conventional Ni-based alloy, and further has better corrosion resistance to gases containing hydrogen fluoride and sulfur compounds than conventional Ni-based alloys. Using a mold made of this Ni-Cr-Mo-based alloy to mold a resin, particularly a fluororesin or a PPS resin, can reduce the consumption of the mold, and therefore the service life of the mold is prolonged. The research results were obtained.

The present invention has been made based on the results of such research,
(1) Cr: 10-25%, Mo: more than 20-25%, Ti: more than 0.8-4%, N: 0.001-0.04%, Mn: 0.05-0.5%, Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0 0.01 to 0.3%, B: 0.0005 to 0.002%, the balance is made of Ni and inevitable impurities, and the amount of C contained as inevitable impurities is adjusted to 0.05% or less. A mold member for resin molding made of a Ni-Cr-Mo alloy,
(2) Cr: 10 to 25%, Mo: more than 20 to 25%, Ti: more than 0.8 to 4%, N: 0.001 to 0.04%, Mn: 0.05 to 0.5%, Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0 0.01 to 0.3%, B: 0.0005 to 0.002%, further Cu: 0.5 to 4%, the balance being Ni and inevitable impurities, C contained as inevitable impurities A mold member for resin molding comprising a Ni—Cr—Mo alloy having a composition adjusted to 0.05% or less,
(3) Cr: 10 to 25%, Mo: more than 20 to 25%, Ti: more than 0.8 to 4%, N: 0.001 to 0.04%, Mn: 0.05 to 0.5%, Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0 0.01 to 0.3%, B: 0.0005 to 0.002%, Nb: 0.5 to 3% and Ta: 0.5 to 3% of one or two A resin molding mold member comprising a Ni—Cr—Mo alloy having a composition in which the balance is made of Ni and inevitable impurities, and the amount of C contained as inevitable impurities is adjusted to 0.05% or less,
(4) Cr: 10 to 25%, Mo: more than 20 to 25%, Ti: more than 0.8 to 4%, N: 0.001 to 0.04%, Mn: 0.05 to 0.5%, Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0 0.01% to 0.3%, B: 0.0005% to 0.002%, and W: 0.1% to 1%, the balance being Ni and inevitable impurities, and C contained as inevitable impurities A mold member for resin molding comprising a Ni—Cr—Mo alloy having a composition adjusted to 0.05% or less,
(5) Cr: 10-25%, Mo: more than 20-25%, Ti: more than 0.8-4%, N: 0.001-0.04%, Mn: 0.05-0.5%, Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0 0.01 to 0.3%, B: 0.0005 to 0.002%, Cu: 0.5 to 4%, Nb: 0.5 to 3%, and Ta: 0.5 Ni-Cr-Mo alloy having a composition containing one or two of ~ 3%, the balance being Ni and inevitable impurities, and adjusting the amount of C contained as inevitable impurities to 0.05% or less Mold member for resin molding,
(6) Cr: 10 to 25%, Mo: more than 20 to 25%, Ti: more than 0.8 to 4%, N: 0.001 to 0.04%, Mn: 0.05 to 0.5%, Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0 0.01 to 0.3%, B: 0.0005 to 0.002%, Cu: 0.5 to 4%, W: 0.1 to 1%, the balance being A mold member for resin molding comprising Ni and an inevitable impurity, and comprising a Ni-Cr-Mo alloy having a composition in which the amount of C contained as an inevitable impurity is adjusted to 0.05% or less,
(7) Cr: 10-25%, Mo: more than 20-25%, Ti: more than 0.8-4%, N: 0.001-0.04%, Mn: 0.05-0.5%, Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0 0.01 to 0.3%, B: 0.0005 to 0.002%, Nb: 0.5 to 3% and Ta: 0.5 to 3% of one or two And a Ni—Cr—Mo alloy having a composition in which the content of W is 0.1 to 1%, the balance is made of Ni and inevitable impurities, and the amount of C contained as inevitable impurities is adjusted to 0.05% or less. Mold member for resin molding,
(8) Cr: 10 to 25%, Mo: more than 20 to 25%, Ti: more than 0.8 to 4%, N: 0.001 to 0.04%, Mn: 0.05 to 0.5%, Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0 0.01 to 0.3%, B: 0.0005 to 0.002%, Cu: 0.5 to 4%, Nb: 0.5 to 3%, and Ta: 0.5 Contains 1 or 2 of ~ 3%, further contains W: 0.1 to 1%, the balance consists of Ni and inevitable impurities, and the amount of C contained as inevitable impurities is 0.05% or less A mold member for resin molding comprising a Ni—Cr—Mo alloy having a composition adjusted to
(9) The present invention is characterized by a resin molding die comprising the resin molding die member described in (1) to (8).

More preferably, the resin-molding mold member made of the Ni—Cr—Mo alloy described in the above (1) to (8) is age-hardened to obtain a desired hardness. Therefore, the present invention
(10) A resin molding die member obtained by curing the resin molding die member according to (1) to (8) by aging precipitation,
(11) The present invention is characterized by a resin molding die comprising a resin molding die member cured by aging precipitation as described in (10) above.

Furthermore, the resin molding die member described in the above (1) to (8) and (10) is useful as a member constituting the resin molding die body, and in particular, a metal that contacts a resin that flows under high pressure. It has an excellent effect as a member of a mold accessory (for example, an injection molding nozzle, a screw for extruding a resin, an extrusion pin, a backflow prevention valve, etc.). Therefore, the present invention
(12) It is characterized by a resin molding die accessory part comprising the resin molding die member described in (1) to (8) and (10).

Next, the reason for limitation of each element in the component composition of the Ni—Cr—Mo alloy constituting the resin molding die member of the present invention will be described in detail.
Cr:
Cr is added because it has the effect of improving corrosion resistance and the effect of improving wear resistance by age hardening. The Ni-based alloy of the present invention is formed into a supersaturated solid solution that can be easily processed by solution heat treatment, and after primary processing to the vicinity of the final shape, it is age-hardened to obtain the desired hardness and finished to the final shape. Thus, a desired mold shape can be provided. It is also possible to disperse fine and uniform precipitates by once forming a solid solution and then performing aging precipitation. The state in which the precipitates are dispersed results in deterioration in corrosion resistance as compared with the solid solution state. In order to suppress corrosion resistance deterioration after desired hardness and age hardening by precipitation aging, it is necessary to contain 10% or more of Cr. However, if the Cr content exceeds 25%, formation of a solid solution becomes difficult, so that primary processing becomes difficult and at the same time sufficient hardness cannot be obtained after aging. Therefore, Cr contained in the mold member for resin molding of this invention is set to 10 to 25%. More preferably, it is 12 to 20%.

Mo:
Mo is added because it has the effect of improving the corrosion resistance in hydrofluoric acid and sulfuric acid. However, if Mo is contained in an amount exceeding 20%, the effect is exhibited, but if it exceeds 25%, solid solution becomes difficult. Therefore, since the workability at the time of manufacture is impaired, the Mo content is set to more than 20 to 25%. A more preferable range of the Mo content is 21 to 25%.

Ti:
Ti is added because it is an element that promotes precipitation hardening by grain boundary reaction type precipitation when coexisting with Cr. However, if its content is 0.8% or less, a desired effect cannot be obtained, while Ti is added to 4%. If the content exceeds 50%, cracking occurs during forging, which is not preferable. Therefore, the Ti content is determined to be in the range of more than 0.8 to 4%. A more preferable range is more than 1.5 to 3%.

N, Mn and Mg:
Since phase stability can be improved by coexistence of N, Mn and Mg, they are added. That is, N, Mn, and Mg are added simultaneously to stabilize the Ni-fcc phase, which is the parent phase, and have the effect of making the second phase difficult to precipitate. Thereby, even if it contains more than 20% of Mo which is an element effective for corrosion resistance, it becomes difficult to precipitate in a short time, and it is possible to enjoy the merit of being easy to handle in manufacturing. In other words, when producing the alloy of the present invention, the ingot after melting is subjected to a hot working process such as hot forging or hot rolling, but if precipitation occurs in a short time, cracking occurs, Processing into a desired shape becomes difficult. Therefore, it is necessary to coexist N, Mn and Mg. The reasons for limitation of N, Mn and Mg are as follows.

N:
If the N content is less than 0.001%, there is no effect of phase stabilization. On the other hand, if N exceeds 0.04%, a nitride is formed, and the corrosion resistance in hydrofluoric acid or sulfuric acid deteriorates. The N content was determined to be 0.001 to 0.04%. A more preferable range is 0.005 to 0.03%.
Mn:
If the content of Mn is less than 0.05%, the effect of stabilizing the phase cannot be obtained, which is not preferable. On the other hand, if the content exceeds 0.5%, the corrosion resistance against hydrofluoric acid or sulfuric acid is lowered, which is not preferable. Therefore, the Mn content is set to 0.05 to 0.5% (more preferably, 0.1% to 0.4%).
Mg:
If the Mg content is less than 0.001%, the effect of stabilizing the phase cannot be obtained, which is not preferable. On the other hand, if the content exceeds 0.05%, the corrosion resistance against hydrofluoric acid and sulfuric acid is reduced. It is not preferable. Therefore, the Mg content is set to 0.001 to 0.05%. A more preferable range is 0.005 to 0.04%.

Fe:
Fe is added because it has an effect of improving workability and suppresses segregation of impurities, and particularly has an effect of preventing deterioration of corrosion resistance against molten fluororesin. However, if its content is 0.1% or less, the desired effect can be obtained. On the other hand, if the Fe content exceeds 1%, the corrosion resistance against the molten fluororesin is deteriorated. Therefore, the Fe content is determined to be more than 0.1 to 1%. A more preferred range is from more than 0.1 to less than 0.5%.

Si:
Si is added because it has the effect of maintaining the cleanliness of the alloy by adding it as a deoxidizing agent. However, if Si is less than 0.01%, the desired effect does not appear in the above action, which is not preferable. If it is contained in an amount of at least%, the corrosion resistance to the molten fluororesin will deteriorate, such being undesirable. Therefore, the content of Si is set to 0.01 to less than 2%. A more preferable range is 0.02 to 0.06%.

Al:
Al has the effect of increasing the hardness when added, but if its content is less than 0.01%, the desired effect cannot be obtained. On the other hand, if Al is contained in an amount of 1.5% or more, the hardness after solution treatment is not obtained. This is not preferable because the thickness becomes too high and cracks are likely to occur during the molding process, and further the machinability and ductility are lowered. Therefore, Al: It was set to 0.01 to less than 1.5%. A more preferable range is 0.01 to less than 0.1%.

V:
V has the effect of increasing the hardness when added, but if its content is less than 0.01%, the desired effect cannot be obtained. On the other hand, if it exceeds 0.3%, ductility is reduced, which is preferable. Absent. Therefore, the content of V is set to 0.01 to 0.3%. A more preferable range is 0.01 to less than 0.1%.

B:
B has the effect of increasing the hardness when added, but if the content is less than 0.0005%, the desired effect cannot be obtained, while if it exceeds 0.002%, the corrosion resistance against hydrofluoric acid and sulfuric acid. Is unfavorable because it decreases. Therefore, the content of B is set in the range of 0.0005 to 0.002%. A more preferable range is 0.0005 to 0.001%.

Cu:
Cu has the effect of improving the corrosion resistance in hydrofluoric acid and sulfuric acid, so it is added as necessary. However, if its content is less than 0.5%, the desired effect cannot be obtained, while it exceeds 4%. Then, since corrosion resistance deteriorates, the content was set to 0.5 to 4%. A more preferable range is 1.5 to 3%.

Nb and Ta:
Since Nb and Ta have an effect of increasing hardness, one or two of them are added as necessary.
When Nb is contained in an amount of 0.5% or more, the effect is shown. However, if the content exceeds 3%, it becomes difficult to form a solid solution, so that workability at the time of production is impaired. 3%. A more preferable range of the Nb content is 1 to 2%.
In addition, the effect is also shown when Ta is contained in an amount of 0.5% or more in the same manner. However, if the content exceeds 3%, it becomes difficult to form a solid solution, so the workability at the time of production is impaired. Of 0.5 to 3%. A more preferable range of the Ta content is 1 to 2%.

W:
W has the effect of improving the corrosion resistance in hydrofluoric acid and sulfuric acid, and is added as necessary. At that time, the effect is shown by containing W in an amount of 0.1% or more, but the content exceeds 1%. Then, since solid solution becomes difficult, workability at the time of manufacture is impaired, which is not preferable. Therefore, the content of W is set to 0.1 to 1%. A more preferable range of the W content is 0.1 to 0.5%.

Inevitable impurities:
C forms carbides with Cr in the vicinity of the grain boundaries, and deteriorates the corrosion resistance. Therefore, C contained as an inevitable impurity is set to 0.05% or less.

  The mold material for resin molding having the component composition of the present invention is excellent in corrosion resistance to hydrofluoric acid and sulfuric acid, and thus molten fluororesin and molten PPS resin, and has almost the same hardness as that of a conventional mold material for resin molding. Therefore, various molds for resin molding, particularly molds for molding fluororesins and PPS resins, and particularly, mold accessories that are exposed to particularly harsh environments (for example, injection molding nozzles, resin presses). When used as a member of a screw, a push-out pin, a backflow prevention valve, etc.), an excellent effect is brought about.

Example 1
All of these materials having a component composition shown in Tables 1 to 6 are prepared by preparing raw materials with low C content, melting and casting them using a normal vacuum high-frequency melting furnace, and then hot forging and hot rolling. Inventive mold members 1 to 46, comparative mold members 1 to 27 and a conventional mold member 1 having a diameter of 40 mm were prepared. These round bars were held at 1200 ° C. for 1 hour and then subjected to water quenching to perform a solution treatment. After cutting the round bar which consists of these invention mold members 1-46, comparative mold members 1-27, and the conventional mold member 1 which gave these solid solution processes, this invention mold members 1-46, comparative mold A round bar composed of mold members 1 to 27 is subjected to an aging treatment at 750 ° C. for 100 hours, and a conventional round bar composed of mold member 1 is subjected to an aging treatment at 700 ° C. for 30 hours, and then an aging treatment. The Vickers hardness of the round bar was measured, and the results are shown in Tables 7-9.

Further, each of the aging-treated round bars was finished to produce an injection molding nozzle having the shape shown in the sectional view of FIG. In FIG. 1, 1 is an injection molding nozzle, 2 is a nozzle body portion, 3 is a nozzle body hole, 4 is a small diameter protruding portion, 5 is a nozzle tip hole, D1 is an outer diameter of the nozzle body portion, and D2 is a small diameter protruding portion. Outer diameter, d1 is the diameter of the nozzle body hole, d2 is the diameter of the nozzle tip hole, L1: length of the entire nozzle, L2 is the length from the nozzle tip, L3 is the length of the nozzle tip hole, and L4 is the small diameter protruding portion These have dimensions of D1: 35 mm, D2: 12 mm, d1: 10 mm, d2: 5 mm, L1: 50 mm, L2: 10 mm, L3: 8 mm, L4: 5 mm.

An injection molding nozzle comprising these mold members 1 to 46, comparative mold members 1 to 27, and a conventional mold member 1 is incorporated into an injection molding machine, and injection molding of PVDF resin, which is a kind of fluororesin, is performed on a cylinder. And injection molding of PPS resin, which is a resin that generates sulfuric acid, under the conditions of nozzle temperature: 400 ° C. and injection pressure: 90 MPa, each 10,000 times under conditions of cylinder and nozzle temperature: 320 ° C. and injection pressure: 90 MPa. The diameter of the nozzle tip hole of the injection molding nozzle after 10,000 times of injection molding is measured, and the diameter of the nozzle tip hole before injection molding is calculated from the diameter of the nozzle tip hole of the injection molding nozzle after 10,000 times of injection molding. The maximum thinning amount was measured by pulling, and the results are shown in Tables 7-9.

From the results shown in Tables 7 to 9, it can be seen that the mold members 1 to 46 of the present invention are superior in corrosion resistance to the PPS resin, which is a resin that generates molten fluororesin and sulfuric acid, as compared with the conventional mold member 1. . However, it can be seen that the comparative mold members 1 to 27 having a value deviating from the present invention are not preferable, such as cracking during forging, or a slight increase in the maximum thickness reduction.

Example 2
Furthermore, the round bar which has the diameter: 40 mm which consists of this invention mold member 1-46 which has the component composition shown by Tables 1-6 produced in Example 1, comparative mold member 1-27, and the conventional mold member 1 Was used to prepare a corrosion test piece having dimensions of 25 mm in length, 25 mm in width, and 3 mm in thickness. The surfaces of these test pieces were polished and finally finished with water-resistant emery paper # 400. The polished corrosion test piece was kept in an ultrasonic vibration state in acetone for 5 minutes, and then degreased. By performing a 100-hour immersion test in a 10% HF solution kept at 40 ° C. and a 10% H ₂ SO ₄ solution kept at 65 ° C., the mass decreased before and after the test was divided by the surface area to obtain a per unit area. The mass reduction amount was calculated, and the corrosion rate (mm / year) was shown in Tables 7 to 9 with the specific gravity value = 8.

From the results shown in Tables 1 to 9, the present invention mold members 1 to 46 have a lower corrosion rate than the conventional mold member 1, and the injection molding nozzle composed of the present mold members 1 to 46 is Since the maximum thickness reduction by injection molding is small compared to the injection molding nozzle made of the conventional mold member 1, the present invention mold members 1 to 46 are more resistant to hydrogen fluoride and sulfur compounds than the conventional mold member 1. You can see that the corrosion resistance is excellent. However, it can be seen that the comparative mold members 1 to 27 which are out of the present invention are not preferable because cracks are generated during forging, the maximum thickness reduction and the corrosion rate are slightly increased.

It is sectional drawing of the nozzle for injection molding used in the Example.

Claims (12)

In mass%, Cr: 10-25%, Mo: more than 20-25%, Ti: more than 0.8-4%, N: 0.001-0.04%, Mn: 0.05-0.5% Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: A composition containing 0.01 to 0.3%, B: 0.0005 to 0.002%, the balance being made of Ni and inevitable impurities, and adjusting the amount of C contained as inevitable impurities to 0.05% or less A resin-molding mold member comprising a Ni-Cr-Mo-based alloy. In mass%, Cr: 10-25%, Mo: more than 20-25%, Ti: more than 0.8-4%, N: 0.001-0.04%, Mn: 0.05-0.5% Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0.01 to 0.3%, B: 0.0005 to 0.002%, further Cu: 0.5 to 4%, the balance is made of Ni and inevitable impurities, and is included as inevitable impurities A mold member for resin molding comprising a Ni—Cr—Mo alloy having a composition in which the C content is adjusted to 0.05% or less. In mass%, Cr: 10-25%, Mo: more than 20-25%, Ti: more than 0.8-4%, N: 0.001-0.04%, Mn: 0.05-0.5% Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0.01 to 0.3%, B: 0.0005 to 0.002%, Nb: 0.5 to 3% and Ta: 0.5 to 3% of one or two of A resin-molding die comprising a Ni—Cr—Mo-based alloy having a composition in which the balance is made of Ni and inevitable impurities, and the amount of C contained as inevitable impurities is adjusted to 0.05% or less Element. In mass%, Cr: 10-25%, Mo: more than 20-25%, Ti: more than 0.8-4%, N: 0.001-0.04%, Mn: 0.05-0.5% Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0.01 to 0.3%, B: 0.0005 to 0.002%, W: 0.1 to 1% further, the balance is made of Ni and inevitable impurities, and is included as inevitable impurities A mold member for resin molding comprising a Ni—Cr—Mo alloy having a composition in which the C content is adjusted to 0.05% or less. In mass%, Cr: 10-25%, Mo: more than 20-25%, Ti: more than 0.8-4%, N: 0.001-0.04%, Mn: 0.05-0.5% Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0.01 to 0.3%, B: 0.0005 to 0.002%, Cu: 0.5 to 4%, Nb: 0.5 to 3% and Ta: 0. Ni-Cr-Mo system having a composition containing one or two of 5 to 3%, the balance being Ni and inevitable impurities, and adjusting the amount of C contained as inevitable impurities to 0.05% or less A mold member for resin molding comprising an alloy. In mass%, Cr: 10-25%, Mo: more than 20-25%, Ti: more than 0.8-4%, N: 0.001-0.04%, Mn: 0.05-0.5% Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0.01 to 0.3%, B: 0.0005 to 0.002%, Cu: 0.5 to 4%, W: 0.1 to 1%, the balance A resin-molding mold member comprising: Ni and an inevitable impurity, and a Ni-Cr-Mo alloy having a composition in which the amount of C contained as an inevitable impurity is adjusted to 0.05% or less. In mass%, Cr: 10-25%, Mo: more than 20-25%, Ti: more than 0.8-4%, N: 0.001-0.04%, Mn: 0.05-0.5% Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0.01 to 0.3%, B: 0.0005 to 0.002%, Nb: 0.5 to 3% and Ta: 0.5 to 3% of one or two of Ni-Cr-Mo system containing, further containing W: 0.1 to 1%, the balance being made of Ni and inevitable impurities, and adjusting the amount of C contained as inevitable impurities to 0.05% or less A mold member for resin molding comprising an alloy. In mass%, Cr: 10-25%, Mo: more than 20-25%, Ti: more than 0.8-4%, N: 0.001-0.04%, Mn: 0.05-0.5% Mg: 0.001 to 0.05%, Fe: more than 0.1 to 1.0%, Si: 0.01 to less than 2.0%, Al: 0.01 to less than 1.5%, V: 0.01 to 0.3%, B: 0.0005 to 0.002%, Cu: 0.5 to 4%, Nb: 0.5 to 3% and Ta: 0. It contains 1 or 2 of 5 to 3%, further contains W: 0.1 to 1%, the balance consists of Ni and inevitable impurities, and the amount of C contained as inevitable impurities is 0.05% A resin-molding mold member comprising a Ni-Cr-Mo-based alloy having a composition adjusted as follows. A resin molding die comprising the resin molding die member according to any one of claims 1 to 8. A resin molding die member obtained by curing the resin molding die member according to any one of claims 1 to 8 by aging precipitation. A resin molding die comprising the resin molding die member cured by aging precipitation according to claim 10. A resin molding die accessory comprising the resin molding die member according to any one of claims 1 to 8 and 10.

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