阅读说明：本技术 消除tc4钛合金板坯端头月牙痕的锻造成型方法 (Eliminate the method for forging and molding of TC4 titanium alloy slab end month dental impression ) 是由 何军利 王博 张乐 侯朝可 于 2019-08-29 设计创作，主要内容包括：本发明公开的消除TC4钛合金板坯端头月牙痕的锻造成型方法,先选取TC4铸锭并进行开坯；再将坯料修磨干净,加热后改锻；随后将坯料修磨干净,加热后展宽、收边；将处理后的坯料修磨干净,加热后拔长、再收边,完成锻造成型。本发明的锻造成型方法可减少回炉次数,减少临界变形区组织,可显著消除TC4钛合金板坯在成型过程中端头出现的“月牙痕”,保证板坯探伤和高低组织均匀性,消除板坯尖角大圆弧,提高成材率,缩短机加工时,提高生产效率；而且本发明锻造成型方法可生产单重4吨以下,尺寸H(130～200)×W(800～1600)×L(1600～3000)的TC4合金板坯,有很好的应用价值。(The method for forging and molding disclosed by the invention for eliminating TC4 titanium alloy slab end month dental impression first chooses TC4 ingot casting and carries out cogging；It is again that blank reconditioning is clean, change forging after heating；It is then that blank reconditioning is clean, it broadened after heating, receive side；By treated, blank reconditioning is clean, pulls out after heating, receives side again, completes forging molding.Method for forging and molding of the invention, which can be reduced, melts down number, critical strain district's groups are reduced to knit, TC4 titanium alloy slab end occurs in forming process " moon dental impression " can be substantially eliminated, guarantee slab flaw detection and height structural homogenity, eliminate slab wedge angle orthodrome, lumber recovery is improved, when shortening machining, improves production efficiency；And method for forging and molding of the present invention can produce 4 tons of substance hereinafter, size H (130~200) × W (800~1600) × L (1600~3000) TC4 alloy slab, there is good application value.)

1. eliminating the method for forging and molding of TC4 titanium alloy slab end month dental impression, which comprises the following steps:

Step 1, it chooses TC4 ingot casting and carries out cogging, obtain the first blank；

Step 2, the first blank reconditioning is clean, change forging after heating, obtains the second blank；

Step 3, the second blank reconditioning is clean, it broadened after heating, receive side, obtain third blank；

Step 4, third blank reconditioning is clean, it pulled out after heating, receive side again, complete forging molding.

2. the method for forging and molding according to claim 1 for eliminating TC4 titanium alloy slab end month dental impression, feature exist In the concrete operations of cogging in the step 1 are as follows:

The TC4 ingot casting is entered into furnace when being not more than 800 DEG C first, then raises temperature to 800 DEG C, keeps the temperature 120-150min；Then 1150 ± 20 DEG C are warming up to, 350-480min is kept the temperature, comes out of the stove；Finally to treated, two upsetting two of TC4 ingot casting is pulled out, each upsetting pull knot The type of cooling is air-cooled after beam, obtains the first blank.

3. the method for forging and molding according to claim 2 for eliminating TC4 titanium alloy slab end month dental impression, feature exist During two upsetting two is pulled out, the processed each upsetting pull deflection of TC4 ingot casting is 37%-40%, and the end of second of upsetting pull It forges temperature and is not less than 800 DEG C.

4. the method for forging and molding according to claim 2 for eliminating TC4 titanium alloy slab end month dental impression, feature exist In the heating and thermal insulation coefficient in the temperature-rise period is 0.3-0.7min/mm.

5. the method for forging and molding according to claim 1 for eliminating TC4 titanium alloy slab end month dental impression, feature exist In the step 2 specifically:

First blank reconditioning is entered into furnace completely and when being not more than 800 DEG C, 800 DEG C is warming up to, keeps the temperature 120-150min；

Phase point temperature+20~50 DEG C are then raised temperature to, 350-450min, forging of coming out of the stove are kept the temperature；

It finally carries out two upsettings two to pull out, water cooling is carried out after each upsetting pull, completion changes forging.

6. the method for forging and molding according to claim 5 for eliminating TC4 titanium alloy slab end month dental impression, feature exist In heating and thermal insulation coefficient is 0.3-0.7min/mm in the temperature-rise period；

Each upsetting pull deflection that two upsetting two is pulled out is 37-40%, and the final forging temperature of second of upsetting pull is not less than 800 DEG C.

7. the method for forging and molding according to claim 1 for eliminating TC4 titanium alloy slab end month dental impression, feature exist In the step 3 specifically:

Second blank reconditioning is entered into furnace completely and when being not more than 800 DEG C, 800 DEG C is warming up to, keeps the temperature 120-150min；

20~50 DEG C are then raised temperature under phase point temperature, 350-450min is kept the temperature, forging of coming out of the stove obtains third blank；

Wherein the width dimensions of the third blank forge board width+40~50mm not less than finished product target, the third blank Thickness reserves the deflection of 15-25%, and the receipts side sequence of the third blank should be from both ends to center, and the type of cooling is air-cooled.

8. the method for forging and molding according to claim 7 for eliminating TC4 titanium alloy slab end month dental impression, feature exist In heating and thermal insulation coefficient 0.3-0.7min/mm in the temperature-rise period.

9. the method for forging and molding according to claim 1 for eliminating TC4 titanium alloy slab end month dental impression, feature exist In the process of the step 4 are as follows:

Third blank is heated under transformation temperature to 40~50 DEG C, heating and thermal insulation coefficient is 0.3-0.7min/ after reconditioning is clean again mm；

Then first the third blank is pulled out along its length, pulling process list hammers volume under pressure≤10mm into shape, then in the width direction Length is received, is received along its length wide.

10. the method for forging and molding according to claim 9 for eliminating TC4 titanium alloy slab end month dental impression, feature exist In sequence when receiving wide along its length is to receive double plate tongues from both ends to center.

Technical field

The invention belongs to titanium alloy slab forming method technical fields, and in particular to a kind of elimination TC4 titanium alloy slab end The method for forging and molding of head month dental impression.

Background technique

Since titanium alloy has many advantages, such as that density is low, specific strength is high, corrosion-resistant, titanium alloy slab is on naval vessel, ocean The fields application such as engineering, chemical industry, petroleum works is more and more wider.But it being limited by raw material process, titanium alloy price is higher, Therefore in manufacturing field, improving stock utilization is to reduce the maximally efficient method of cost.

Field is forged in titanium plate base, to improve stock utilization, many hammered work persons attempt a variety of forging technologies, to mention High stock utilization, application maturation the most is aglossate forging, is mainly used for the small slab forging molding of pure titanium, the method forging Process, complex process, and it is easy to appear a moon dental impression in the end of finished product slab, yield rate is low；In addition, monolithic alloy slab Weight requirements are increasing, this technique is also unable to reach requirement at present.

Summary of the invention

The object of the present invention is to provide a kind of method for forging and molding of elimination TC4 titanium alloy slab end month dental impression, solve Existing forging method complex process, yield rate low problem.

The technical scheme adopted by the invention is that the method for forging and molding of TC4 titanium alloy slab end month dental impression is eliminated, packet Include following steps:

Step 1, it chooses TC4 ingot casting and carries out cogging, obtain the first blank；

Step 2, the first blank reconditioning is clean, change forging after heating, obtains the second blank；

Step 3, the second blank reconditioning is clean, it broadened after heating, receive side, obtain third blank；

Step 4, third blank reconditioning is clean, it pulled out after heating, receive side again, complete forging molding.

It is of the invention to be further characterized in that,

The concrete operations of cogging in step 1 are as follows:

TC4 ingot casting is entered into furnace when being not more than 800 DEG C first, then raises temperature to 800 DEG C, keeps the temperature 120-150min；Then 1150 ± 20 DEG C are warming up to, 350-480min is kept the temperature, comes out of the stove；Finally to treated, two upsetting two of TC4 ingot casting is pulled out, each upsetting pull knot The type of cooling is air-cooled after beam, obtains the first blank.

During two upsettings two are pulled out, the processed each upsetting pull deflection of TC4 ingot casting is 37%-40%, and second of upsetting pull Final forging temperature is not less than 800 DEG C.

Heating and thermal insulation coefficient in temperature-rise period is 0.3-0.7min/mm.

Step 2 specifically:

First blank reconditioning is entered into furnace completely and when being not more than 800 DEG C, 800 DEG C is warming up to, keeps the temperature 120-150min；

Phase point temperature+20~50 DEG C are then raised temperature to, 350-450min, forging of coming out of the stove are kept the temperature；

It finally carries out two upsettings two to pull out, water cooling is carried out after each upsetting pull, completion changes forging.

Heating and thermal insulation coefficient is 0.3-0.7min/mm in temperature-rise period；

Each upsetting pull deflection that two upsettings two are pulled out is 37-40%, and the final forging temperature of second of upsetting pull is not less than 800 DEG C.

Step 3 specifically:

Second blank reconditioning is entered into furnace completely and when being not more than 800 DEG C, 800 DEG C is warming up to, keeps the temperature 120-150min；

20~50 DEG C are then raised temperature under phase point temperature, 350-450min is kept the temperature, forging of coming out of the stove obtains third blank；

Wherein the width dimensions of third blank forge board width+40~50mm, the thickness of third blank not less than finished product target The receipts side sequence of the deflection of reserved 15-25%, third blank should be from both ends to center, and the type of cooling is air-cooled.

Heating and thermal insulation coefficient 0.3-0.7min/mm in temperature-rise period.

The process of step 4 are as follows:

Third blank is heated under transformation temperature to 40~50 DEG C, heating and thermal insulation coefficient is 0.3- after reconditioning is clean again 0.7min/mm；

Then first the third blank is pulled out along its length, pulling process list hammers volume under pressure≤10mm into shape, then along width Length is received in direction, is received along its length wide.

Sequence is to receive double plate tongues from both ends to center when receiving wide along its length.

The beneficial effects of the present invention are: the present invention eliminates the method for forging and molding of TC4 titanium alloy slab end " moon dental impression " By the way that " (20~50) DEG C change under forging-transformation temperature under (20~50) DEG C broadening-polishing-transformation temperature in ingot formation-transformation temperature (40~50) DEG C receive edge forming " process flow, reduces and melts down number, reduce critical strain district's groups and knit, can substantially eliminate the conjunction of TC4 titanium Golden plate base end occurs in forming process " moon dental impression " guarantees slab flaw detection and height structural homogenity, eliminates slab point Angle orthodrome improves lumber recovery, when shortening machining, improves production efficiency；And method for forging and molding of the present invention can production list 4 tons are weighed hereinafter, size H (130~200) × W (800~1600) × L (1600~3000) TC4 alloy slab, has well Application value.

Specific embodiment

Below by specific embodiment, the present invention is described in detail.

A kind of method for forging and molding for eliminating TC4 titanium alloy slab end month dental impression of the present invention, comprising the following steps:

Step 1, it chooses TC4 ingot casting and carries out cogging, obtain the first blank；The purpose of step 1 is to be crushed coarse as cast condition group It knits, avoids Structure Inheritance.Specifically:

TC4 ingot casting is entered into furnace when being not more than 800 DEG C first, then raises temperature to 800 DEG C, keeps the temperature 120-150min；Then 1150 ± 20 DEG C are warming up to, 350-480min is kept the temperature, comes out of the stove；Finally to treated, two upsetting two of TC4 ingot casting is pulled out, each upsetting pull knot The type of cooling is air-cooled after beam, obtains the first blank.During two upsettings two are pulled out, the processed each upsetting pull deflection of TC4 ingot casting is equal For 37%-40%, and the final forging temperature of second of upsetting pull is not less than 800 DEG C.Heating and thermal insulation coefficient is 0.3~0.7min/mm.

Step 2, the first blank reconditioning is clean, change forging after heating, obtain the second blank, the purpose for changing forging after heating is true Protect it is subsequent change forging and can be realized by given process, guarantee structural homogenity before molding is forged.

First blank reconditioning is entered into furnace completely and when being not more than 800 DEG C, 800 DEG C is warming up to, keeps the temperature 120-150min；With After be warming up to phase point temperature+20~50 DEG C, keep the temperature 350-450min, forging of coming out of the stove；It finally carries out two upsettings two to pull out, each upsetting pull After carry out water cooling, completion changes forging.Heating and thermal insulation coefficient is 0.3-0.7min/mm in temperature-rise period；Two upsettings two are pulled out every Secondary upsetting pull deflection is 37-40%, and the final forging temperature of second of upsetting pull is not less than 800 DEG C.

Step 3, the second blank reconditioning is clean, it broadened after heating, receive side, obtain third blank；

Second blank reconditioning is entered into furnace completely and when being not more than 800 DEG C, 800 DEG C is warming up to, keeps the temperature 120-150min；With After be warming up under phase point temperature 20~50 DEG C, keep the temperature 350-450min, forging of coming out of the stove obtains third blank；Wherein third base The width dimensions of material forge board width+40~50mm not less than finished product target, and the thickness of third blank reserves the deformation of 15-25% The receipts side sequence of amount, third blank should be from both ends to center, and the type of cooling is air-cooled.

Heating and thermal insulation coefficient 0.3-0.7min/mm in temperature-rise period.

Step 4, third blank reconditioning is clean, it pulled out after heating, receive side again, complete forging molding；Guarantee molding forging It is realized according to set technique, while ensuring that plate face is smooth, size meets technique requirement.

Third blank is heated under transformation temperature to 40~50 DEG C, heating and thermal insulation coefficient is 0.3- after reconditioning is clean again 0.7min/mm；Then first third blank is pulled out along its length, pulling process list hammers volume under pressure≤10mm into shape, then along width side To length is received, receive along its length wide.

Sequence is to receive double plate tongues from both ends to center when receiving wide along its length.

Above-mentioned method for forging and molding compares conventional method: melting down number reduction, critical strain district's groups are knitted reduction, substantially eliminated TC4 titanium alloy slab end occurs in forming process " moon dental impression " guarantees slab flaw detection and height structural homogenity, eliminates Slab wedge angle orthodrome improves lumber recovery, when shortening machining, improves production efficiency.