阅读说明：本技术 一种高铌钛合金均质铸锭的制备方法 (A kind of preparation method of high niobium titanium alloy homogeneous ingot casting ) 是由 周伟 辛社伟 陈军 李倩 贾伟菊 张思远 李思兰 毛成亮 于 2019-09-25 设计创作，主要内容包括：本发明公开了一种高铌钛合金均质铸锭的制备方法,包括以下步骤：一、将铌车屑进行破碎处理得到铌碎屑,进行真空退火；二、将经真空退火后的铌碎屑和海绵钛进行混合,得到混合料；三、将混合料和海绵钛在模具中依次进行布料和压制,得到电极块；四、将电极块进行电极组焊,得到电极棒；五、将电极棒进行真空自耗电弧熔炼,得到高铌钛合金均质铸锭。本发明制备的高铌钛合金均质铸锭中铌的质量百分数不小于40％,实现了具有高含量难熔金属铌的铌钛合金的有效制备,制备出的高铌钛合金均质铸锭中各合金成分分布均匀、波动较小,并且无铌夹杂等缺陷,满足了工业化生产对高铌钛合金均质铸锭成分分布均匀性的要求。(The invention discloses a kind of preparation methods of high niobium titanium alloy homogeneous ingot casting, comprising the following steps: and one, niobium vehicle considered to be worth doing carry out break process and obtain niobium clast, carry out vacuum annealing；Two, by after vacuum annealing niobium clast and titanium sponge mix, obtain mixture；Three, mixture and titanium sponge are successively carried out to cloth and compacting in a mold, obtain electrode block；Four, electrode block is subjected to electrode group weldering, obtains electrode bar；Five, electrode bar is subjected to vacuum consumable arc-melting, obtains high niobium titanium alloy homogeneous ingot casting.The mass percent of niobium is not less than 40% in high niobium titanium alloy homogeneous ingot casting prepared by the present invention, realize effective preparation of the niobium titanium alloy with high-content refractory metal niobium, in the high niobium titanium alloy homogeneous ingot casting prepared each alloying component be evenly distributed, fluctuate it is smaller, and the defects of no niobium is mingled with meets requirement of the industrialized production to high niobium titanium alloy homogeneous ingot casting distributed components.)

1. a kind of preparation method of high niobium titanium alloy homogeneous ingot casting, which is characterized in that method includes the following steps:

Niobium clast is obtained Step 1: niobium vehicle is considered to be worth doing and carries out break process, vacuum annealing process then is carried out to niobium clast；

Step 2: niobium clast and titanium sponge progress mixed processing in step 1 after vacuum annealing process are obtained mixture；

Step 3: titanium sponge is respectively as the upper and lower in pressing die using mixture obtained in step 2 as middle layer Cloth is carried out in tool, is then carried out compression process, is obtained electrode block；

Step 4: electrode block obtained in step 3 is carried out electrode group weldering processing, electrode bar is obtained；

Step 5: electrode bar obtained in step 4 is carried out vacuum consumable arc-melting processing, high niobium titanium alloy homogeneous is obtained Ingot casting；The mass percent of niobium is not less than 40% in the high niobium titanium alloy homogeneous ingot casting.

2. a kind of preparation method of high niobium titanium alloy homogeneous ingot casting according to claim 1, which is characterized in that in step 1 The niobium vehicle bits are the vehicle bits generated when niobium Vehicle Processing, and the granularity of the niobium clast is less than 3mm, the item of the vacuum annealing process Part are as follows: vacuum degree is less than 5 × 10^-2MPa, temperature are 800 DEG C~850 DEG C, and the time is no less than 30min.

3. a kind of preparation method of high niobium titanium alloy homogeneous ingot casting according to claim 1, which is characterized in that in step 2 The mixture by mass ratio be (2~3): 1 niobium clast and titanium sponge forms, the titanium sponge be granularity be 3mm~ 0 grade of titanium sponge of 12.7mm, the time of the mixed processing are 5min~8min.

4. a kind of preparation method of high niobium titanium alloy homogeneous ingot casting according to claim 1, which is characterized in that in step 3 The titanium sponge of the titanium sponge and lower layer on the upper layer it is identical in quality, the titanium sponge is 0 grade of sea that granularity is 3mm~12.7mm Continuous titanium.

5. a kind of preparation method of high niobium titanium alloy homogeneous ingot casting according to claim 1, which is characterized in that in step 4 The process of the electrode group weldering processing are as follows: 20 pieces or more of electrode block is welded as by electrode bar by the method for plasma arc welding (PAW).

6. a kind of preparation method of high niobium titanium alloy homogeneous ingot casting according to claim 1, which is characterized in that in step 5 The vacuum consumable arc-melting number of processing is three times.

Technical field

The invention belongs to metal metallurgy smelting technical fields, and in particular to a kind of preparation method of high niobium titanium alloy homogeneous ingot casting.

Background technique

Niobium is the isomorphism beta stable element of titanium alloy, can be infinitely dissolved with titanium.Since the fusing point of niobium element is higher than titanium Much, and density is big, the current high generally existing ingot metallurgy quality problems of niobium titanium alloy.

To the special titanium alloy of the more refractory metal niobium of content, the homogenization distribution of refractory metal elements niobium is to protect in ingot casting Demonstrate,prove the key of ingot quality.Useful niobium stick and titanium sponge electrode pressing in the prior art, or use niobium stick as consutrode Sponge titanium electrode is welded on niobium stick by center portion, and the technique that alloy cast ingot is prepared by multiple vacuum consumable arc-melting is this The alloy cast ingot of preparation is easy that there are niobium niggerheads.In addition, after also having niobium metal powders being used to mix as raw material with titanium sponge Vacuum consumable arc-melting technique is carried out, but a large amount of powder are added in titanium sponge, are remarkably decreased pole strength, and melting electric current It is higher than conventional titanium alloy again, be easy to cause in electrode fusion process and be broken, directly affect ingot quality.If passing through scull Melting prepares niobium titanium, and not only preparation process is complicated, price is higher, but also broken difficulty.Therefore, it is necessary to a kind of preferably systems Preparation Method improves the metallurgical quality of niobium titanium alloy homogeneous ingot casting.

Summary of the invention

Technical problem to be solved by the present invention lies in view of the above shortcomings of the prior art, provide a kind of high niobium titanium alloy The preparation method of homogeneous ingot casting.This method is using the broken obtained niobium clast of niobium vehicle bits as the source of niobium, by controlling niobium clast Granularity, the parameter of vacuum annealing process, in mixture niobium clast and titanium sponge mass ratio and distributing method, avoid at melting Niobium occurs during reason to fall, is conducive to being uniformly distributed for niobium in the high niobium titanium alloy homogeneous ingot casting of preparation, present invention preparation The mass percent of niobium is not less than 40% in high niobium titanium alloy homogeneous ingot casting out, and each alloying component is evenly distributed, it is smaller to fluctuate, And the defects of no niobium is mingled with meets requirement of the industrialized production to high niobium titanium alloy homogeneous ingot casting distributed components.

In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of system of high niobium titanium alloy homogeneous ingot casting Preparation Method, which is characterized in that method includes the following steps:

Niobium clast is obtained Step 1: niobium vehicle is considered to be worth doing and carries out break process, vacuum annealing process then is carried out to niobium clast；

Step 2: niobium clast and titanium sponge progress mixed processing in step 1 after vacuum annealing process are mixed Close material；

Step 3: using mixture obtained in step 2 as middle layer, titanium sponge is being pressed respectively as the upper and lower Cloth is carried out in molding jig, is then carried out compression process, is obtained electrode block；

Step 4: electrode block obtained in step 3 is carried out electrode group weldering processing, electrode bar is obtained；

Step 5: electrode bar obtained in step 4 is carried out vacuum consumable arc-melting processing, high niobium titanium alloy is obtained Homogeneous ingot casting；The mass percent of niobium is not less than 40% in the high niobium titanium alloy homogeneous ingot casting.

A kind of preparation method of above-mentioned high niobium titanium alloy homogeneous ingot casting, which is characterized in that the bits of niobium vehicle described in step 1 For the vehicle bits generated when niobium Vehicle Processing, the granularity of the niobium clast is less than 3mm, the condition of the vacuum annealing process are as follows: vacuum Degree is less than 5 × 10^-2MPa, temperature are 800 DEG C~850 DEG C, and the time is no less than 30min.It is generated when the present invention is using niobium Vehicle Processing Vehicle considers the source as niobium of the present invention to be worth doing, has the advantages that niobium clast at low cost and readily available, using granularity less than 3mm, In Niobium clast will not reunite during mixed processing, realize being uniformly distributed for niobium in mixture, avoid melting processing Generation is mingled in the process and component segregation, the present invention use the condition of vacuum annealing process are as follows: in vacuum degree less than 5 × 10^-2MPa Under the conditions of, temperature is 800 DEG C~850 DEG C, the time is no less than 30min, softens niobium clast and has higher ductility, is pressing Realize that niobium clast uniformly sticks in sponge titanium surface layer after system processing, ensure that will not occur falling for niobium in melting treatment process, The vacuum annealing process can also effectively remove the cuttings liquid or greasy dirt that niobium clast is infected in shattering process.

A kind of preparation method of above-mentioned high niobium titanium alloy homogeneous ingot casting, which is characterized in that mixture described in step 2 Be (2~3) by mass ratio: 1 niobium clast and titanium sponge forms, and the titanium sponge is 0 grade of sponge of granularity 3mm~12.7mm Titanium, the time of the mixed processing are 5min~8min.The present invention uses mass ratio for (2~3): 1 niobium clast and titanium sponge Mixture is formed, makes niobium clast and titanium sponge in mixture that there is suitable volume ratio, institute in electrode block is made after compression process Some niobium clasts uniformly stick in sponge titanium surface layer, avoid and falling for niobium occurs in melting treatment process, ensure that in ingot casting Niobium is uniformly distributed, and the present invention uses the time of mixed processing for 5min~8min, makes niobium clast and titanium sponge in mixture It is mixed thoroughly, is conducive to niobium in the high niobium titanium alloy homogeneous ingot casting of preparation and is uniformly distributed, the present invention uses granularity for 3mm 0 grade of titanium sponge of~12.7mm has spongiform pore structure and lesser volume, guarantees that niobium clast is complete after compression process Its surface is sticked in entirely, avoids and falling for niobium occurs in melting treatment process.

A kind of preparation method of above-mentioned high niobium titanium alloy homogeneous ingot casting, which is characterized in that upper layer described in step 3 Titanium sponge and the titanium sponge of lower layer it is identical in quality, the titanium sponge is 0 grade of titanium sponge of granularity 3mm~12.7mm.The present invention Using the titanium sponge and lower layer on upper layer titanium sponge it is identical in quality, after compression process realize titanium sponge be uniformly wrapped in mixing Expect surface layer, avoids in melting treatment process due to the exposed caused outside side arc phenomenon of high-melting-point niobium clast, ensure that The safety of melting treatment process carries out.

A kind of preparation method of above-mentioned high niobium titanium alloy homogeneous ingot casting, which is characterized in that electrode group described in step 4 Weld the process of processing are as follows: 20 pieces or more of electrode block is welded as by electrode bar by the method for plasma arc welding (PAW).The present invention uses Electrode block is welded as electrode bar by plasma arc welding (PAW), and it is excellent to have that welding heat affected zone is small, welding deformation is small and welding quality is high etc. Point.

The preparation method of above-mentioned a kind of high niobium titanium alloy homogeneous ingot casting, which is characterized in that vacuum described in step 5 is certainly Consuming electric arc melting number of processing is three times.Electrode bar is carried out vacuum consumable arc-melting three times by the present invention, is effectively ensured The uniformity of the high niobium titanium alloy homogeneous ingot casting of preparation, the present invention use vacuum consumable arc-melting, have simple process, melting The advantages that uniformization effect is good.

Compared with the prior art, the present invention has the following advantages:

1, the mass percent of niobium is not less than 40% in high niobium titanium alloy homogeneous ingot casting prepared by the present invention, and realizing has Effective preparation of the niobium titanium alloy of high-content refractory metal niobium, each alloying component point in the high niobium titanium alloy homogeneous ingot casting prepared Cloth uniformly, fluctuation it is smaller, and the defects of be mingled with without niobium, it is equal to high niobium titanium alloy homogeneous ingot casting component distributing to meet industrialized production The requirement of even property.

2, the present invention considers the source as niobium in high niobium titanium alloy homogeneous ingot casting to be worth doing using the vehicle that generates when niobium processing, at This low and readily available advantage makes mixing treatment that the group of niobium clast will not occur in the process by controlling the granularity of niobium clast It is poly-, being uniformly distributed for niobium in mixture is realized, ensure that being uniformly distributed for niobium in high niobium titanium alloy homogeneous ingot casting, the present invention is logical It crosses and niobium clast is subjected to vacuum annealing process, make niobium clast that there is higher ductility, niobium clast is equal after being conducive to compression process It is even to stick in sponge titanium surface layer, it avoids and falling for niobium occurs in melting treatment process.

3, the present invention utilizes the sponge of titanium sponge by using the niobium clast and titanium sponge of certain mass ratio as mixture The advantages of pore structure of shape and lesser volume, makes niobium clast all in electrode block uniformly stick in sea after compression process Continuous titanium surface avoids and niobium occurs in melting treatment process falls, and realizes the uniform of niobium in high niobium titanium alloy homogeneous ingot casting Distribution.

4, the present invention passes through three layers of distributing method, and mixing package is rolled among titanium sponge, avoids and handles in melting In the process since high-melting-point niobium clast is exposed in caused side arc phenomenon, it ensure that the safety of melting treatment process carries out.

5, simple production process of the present invention, it is at low cost, be easily industrialized production.

Technical solution of the present invention is described in further detail below by embodiment.

Detailed description of the invention

Fig. 1 is the macrostructure figure of Ti-47Nb alloy homogeneous ingot casting riser prepared by the embodiment of the present invention 1.

Specific embodiment