JPS5947081A - Production of titanium or titanium alloy clad steel plate - Google Patents

Abstract

PURPOSE:To obtain a titanium or titanium alloy clad steel having excellent joining force and bendability after hot working and heat tretment, by combining a joining medium material between the clean surfaces of a base material and a cladding material with both clean surfaces in tight contact with each other, sealing hermetically the outside circumference, maintaining the inside in a vacuum or inert gaseous atmosphere and rolling the materials under heating. CONSTITUTION:One of niobium, niobium alloy, tantalum, and tantalum alloy is interposed as an intermediate joining medium material 2 between a cladding material 3 of titanium or titanium alloy and a steel plate 1 which is a base material. The joint surfaces of the materials 1, 2, 3 are chemically and mechanically cleaned in this state. The cleaned surfaces are brought into tight contact with each other. A release material 7 is coated on the top surface of the material 3 and a dummy plate is superposed thereon. A mild steel joining plate 4 is placed on the outside circumference to seal hermetically the circumference. A suction pipe 6 is mounted in one place of the plate 4 and the inside is maintained at 10<-1> Torr degree of vacuum or under an inert gaseous atmosphere of Ar or the like. The assembly is heated to a 700-800 deg.C temp. range and is rolled at >=2 rolling reduction.

Description

[Detailed description of the invention] Wood Ji Ming uses intermediate soot-like] A, 1] rolling rolling γ1 method 4'
Main manufacturing methods and methods related to the manufacturing method of titanium clad steel sheets: Titanium or titanium alloys have excellent IJ corrosion resistance, so they can be used in various chemical reaction vessels, 7117 ocean) 111 structures, and seawater. It is used in various equipment, etc., and the demand for it is increasing in 2017. However, there are significant economic constraints when using it in large quantities as a special shrine.

In this case, the use of titanium has been improved by combining corrosion resistance (Δ titanium used in the old method, preparation as a strength material, etc.) [The use of titanium clad steel sheets is increasing.

In recent years, in addition to the conventional explosive crimping method, research has been progressing on methods for manufacturing titanium clad steel sheets, such as the rolling crimp method and the expanded 1] k-joining method. In the method, brittle intermetallic compounds are generated during hot rolling, making it impossible to obtain a good joint. A method of inserting an intermediate welding material has been proposed, but the area is small and it has not been used industrially.

Shitakatsu-C, only butane clad steel sheets made using the explosive crimping method are chemically bonded! It is widely used as A-paddy.

For example, IJ
, the content of carbon fixing elements in the steel is limited, and special preparations are used to prepare the A manufacturing method is disclosed, and JP-A-52-134! i93 and 134 (if1) discloses
! The YJ method is disclosed in which titanium clad steel is manufactured by manual welding by electron beam welding in a vacuum of 1 or more, followed by cold rolling or rolling at 180°C. Kai If!j Publication No. 56-74390, Publication No. 715H, Publication No. 1287, and Publication No. 128G
The official gazette states that Or, M, O, V, N i S (/11 or IJ) are used as an intermediate welding material and are expanded without intervening (in the joining method, J.-) (A method for manufacturing butane clad steel is disclosed.

In these publications, butane steel (4 and i+', i
To create such a joining method C (Yo January full)
r (s).Furthermore, the inventor has
According to experiments (s) δ・1, these methods have J:ruf
Tankrat! Oka is partially able to obtain joints, but
- Achieving uniform bonding at the inner leaflets (without 1)
The W surface bond strength 1σ of the joint part is JIFu-('3
, i n03 titanium clad steel welding strong electric 'a'r
'＋I couldn't do enough. .

Currently, there is no such butane clad steel commercially available.

One of the fundamental problems that is a constraint when manufacturing titanium clad steel using the H method that does not use an intermediate welding material is the butane or 1iL19 alloy and f31 +4
A weak alloy layer forms between the steel plates due to the phase Lj diffusion phenomenon. However-) C, Butane Krat 5N! ! 7. During the manufacturing process, the alloy layer of +3 and 011) is formed through the strip A'1 (e.g. high temperature atmosphere, etc.). K U must know the ``Clad manufacturing method (
For example, it is considered difficult to manufacture a titanium-fJ4 clad steel plate that is directly bonded (for example, a diffusion bonding method, a rolling pressure bonding method, etc.).

The butane clad steel manufacturing method used in the explosion bonding method has the following limitations: Industrially manufactured titanium plates have a width of approximately 2m or less, and there are no longer ones commercially available. It is not produced industrially for reasons such as damage caused to the light beams. There are also limitations due to factors such as a decline in

Furthermore, there is a limit to the capacity of stage 1fi, and it is not possible to meet market demands for titanium clad steel plates with a large area.

In view of the above points, the present inventor has carried out a second-by-second experimental inspection device related to the production of titanium clad steel plates/J rh. As a result, I finally came up with a defense of the tree.

In other words, 15, wood is butane;
``alloy, tantalum, tantalum alloy) should be avoided by intermediary welding materials, and the bonding surface between the intermediate welding material and the composite material (A steel plate, etc.) should be chemically or (regionally clean). , avoiding the clean surfaces of the plates, welded the four circumferences and made 6401 body (1-1
Achieved by the union! 14~ Vacuum the inside 1 good 10'
-T-orr or more (yo△toy 1) Maintain the atmosphere as a small active gas atmosphere, heat the mixture uniformly to within the wet Iσ range of 700°C to 850°C, and roll it. Summary of a method for manufacturing a butane or -1-tan alloy clad steel sheet, characterized in that it is rolled to a ratio of 2 to -1, and a lithium or titanium alloy clad steel sheet is produced. Ru.

Below, I will explain the details of this book in detail.

In the present invention, the steel plate with +3C is defined in JIS (Shikiru SS Shrine, 813 Shrine, SM 4Δ, SUS Shrine OJ
, and IJ similar to these, butane shrine (yo,
Titanium alloy 11M (at least 73.05 w
Contains t%T1) (・(1, in the text, () is often referred to as butane.

The intermediary medium of this material is required to be a metal with excellent malleability, since it does not generate brittle intermetallic compounds between titanium and steel sheets. As a result of various savings i・1, pure 2A for earthworks, Ni+-121', N11-7-i
-Δb alloy such as t31. 9 pieces of glue for Dori, l
It was found that tantalum alloys such as -a-Nb, -1-a-'l'i, etc. can be optimally used.

First, both surfaces of the intermediate welding material of the present invention and the bonding surface of the titanium, 114,1, and <f steel plates, which are 044, are cleaned. These adhesion surfaces should be immersed.
1.Remove the surface oxide film using chemical f-stage polishing or grinder II polishing, etc., and then remove the surface oxide film.
1) Apply 1 to 100% of the liquid to the bufu with soil blend or fluorinated solvent, etc., and apply 2) grease to the clean surface.

The maximum roughness of these adhesive surfaces is 125μm-1ml1x
[Preferably, 3μL 1max or more]・(1)
Or the joint will be more uniform.

Next, we will discuss the combination U of base material, intermediate medium +1j)tA, and sum 4Δ.

Both clean surfaces of the middle 11U medium welding shrine are in close contact between the clean surface of the composite material and the temporary clean surface of 11144474. , To seal the surfaces of the combinations A and A, a mild steel bonding plate is applied to the outer periphery and welded to form a silk-like surface.

At this time, a suction pipe made of soft 61L1, /Ll is a low alloy steel at one place on the joining plate (:I + -J).

In Figure 1, negative figure 12, (, 1 is I!J 446th elm, 2 (, 11 is the intermediate medium of the present invention, 3 is the composite material C) titanium, /1 is the bonding plate, b is Welding build, 6 (yo suction bar
-f, 7 is separation O J131.1 dummy plate C 1, 1st
The figure shows combination 1 when two butane clad tM boards of the same type are obtained by one roll pressure welding. ! There is a camp.

This is a good man to leave 1. J, Butane 1 1 tane room 1
．． ．． 11.1゜Metal thickness November 7th 10th time z l:J Reponanai. Figure 2 shows 1'J7 Kuratu l''!1'
4 Suitable for small production of temporary or non-standard cladding.

After welding is complete, connect the suction vibro in the closed position to true 1/-'bon-1 to C1, leaving the gap between the space and the adhesive surface 1 orr ()<(yo10'-1' or less) Reduce the pressure to 1.+, j 7', fJ Bon-) in the exhaust system) ()15 inert gas (for example)'e
1Δ1・etc.) to J, S, Ai 1! After performing Kazu Reisai inside the body, 1 r orr of the inside of the body is done! II'
1. After such silica reduction, the first bar is sealed by forge welding or the like and rejected.

7 h (more than 1”C 8
After uniformly heating within a temperature range of 80°C or higher, immediately roll 1 (7U +Ft?' / made +'ii'+
IV! J'F) 2 (r5 JJ, perform ten hot ri extensions.

When the heating temperature exceeds 8,180°C, the crystal system of butane changes from a close-packed hexagonal system to a body-centered cubic system, and the surface roughness due to the repeated conversion to 1 becomes remarkable.
It is difficult to achieve a prescribed rolling ratio of 11 in one hot rolling. (Rolled to the prescribed mowing)
In the case of no carbonization (well, if hot rolling is carried out many times, no low bonding strength will be observed.

The thickness of the intermediate welding 4A is as follows:
If it is C110 Miku 1" or more, it will have the effect of being a medium 18 shrine.
] (11 et al., bonding strength 1.
Ribbed.

10 miku [If it goes below 1 n, the young -
1(]・I tend to be 41).

Fig. 5 and Fig. a16 illustrate the relationship between the thickness of the intermediate weld () 1 and the front welding force, as well as the relationship between the elongation ratio, the reduction JU degree, and the resultant force of the 1fv surface 18.

This J, sea urchin ζ manufactured L tank - knot finger is 19
We have carried out the morning breaking test and found that the standard for titanium clad steel plates is JISO: 603 ()N218.
(14 kg 7 fat) There was Wi'C that fully satisfied.

In addition, this titanium clad steel plate was further heat-treated and sheared 19
As a result of the i test, it was confirmed that the bonding force of the above-mentioned JIS standard 1irJ or more for the 'c6.1\) beam was 61 (!1
0) and bending test results indicate that the titanium clad steel plate has strong bonding strength and excellent bending properties +11 ", J!
It was done.

:1, l-ko-ri! As shown in Fig. 3 and Fig. 1, butane 3- is added to the titanium of the titanium clad steel sheet manufactured according to the present invention, or rt port A1 (/,) 18
4, and then add fN 1'' to 1.
Both of these are bonded using conventionally known bonding techniques, such as BakuWe.
1]-It is possible to manufacture titanium clad steel of a predetermined =J method by joining by a drawing method, a diffusion bonding method, a rolling pressure bonding method, a build-up welding method, etc.6.

However, it is also possible to heat and roll such multi-1fQ butane clad steel by 11 degrees to produce a thinner plate or plate of 1-tank clad steel (ash).

Examples of the present invention will be described below.

Example 1 Composite material, "CIf) mm I x 100nni
W x 200mm l- gentle titanium plate (+131 types)
The base material is 30 L x 100 W x 205 ml.
A 1 liter JIS SF3 A2 steel plate was used as an intermediate welding material.
llWX 200IN111-' industrial pure 2A board (N:) content 99. ! 1 (iwt%mus)
Please use J, S (2-10, 1+(
i) INant X 100mm W X 10
00 Dragon]- titanium rat 8N plate was prepared.

First of all, 41150' for both sides of 2A and 1T? Ding Bano (IJI 1-L) 1.1: The surfaces of the titanium and steel plates in contact with this 2A plate were degreased with a grinder (111 stories were carried out, 71 and b were degreased and C). That was it.

After this, the -A plate is placed between the titanium and 6M 4fi f, T
h i, I.

After assembling, 11 combinations were made by arc welding using IP, IK 4, which had been removed from J, sea urchin tummy plate F3, and 1 pull bar R as shown in Fig. 2. At this time, between the titanium temporary 3rd tammy plate E3 and the 1M11
Painted the 7th month of the month.

Shun the king, connects the suction pie 1G to the vacuum pump f °1;
14J Goi! Vacuum level inside the body 811 10-3 01'
After making it I'', a part of the suction pizoro was forge welded to seal it.

For comparison, a titanium clad steel was made with the same strip 171 without inserting the intermediate medium coupling.

11-Continued state of both parties and! i 4 (1℃, G
2! i'(', C Test the interfacial bonding force of the heat-treated Ω gate i-1-)l.

The results are shown in Table 1.

The present invention is based on the intermediate medium welding type -f titanium clad steel, which has a strong interfacial bonding force that can satisfactorily cover a small JIS standard clay for 1 minute. As a result of analysis of the 18 bonding interface using an analyzer, no decarburization phenomenon of the steel at the 2A/steel interface was observed, and it was confirmed that the 18 bonding interface had a good bonding surface.

Example 2 10IIB I X 100+nIIW as composite material
X 2 (10 dragons pure titanium plate (J I S 'I f
13(1mmt x 10(
1mmWX 205mm1- JIS SF3 42
Steel plate, intermediary joint material r O, 5u t x H) Omm
Using an industrial pure tantalum plate (W x 200m++ 1-) (a-containing ffi, 99.9W [% or more)], it was
G) mm t x 100vn W x 1000m
A titanium clad fl'l board of m l-- was prepared.

First, #1 both sides of the tantalum board! i0 and eight ωl
IFI11, and the surfaces of the titanium and steel plates in contact with this two-A plate were smoothed to the surface of the L grinder 1ull I (after carrying out ζ).

After this, after combining the tantalum plate between the titanium (! steel plates), remove the dummy plate 8 and the suction vibrator (3).
Using the joint plate 4 with the l-shaped joint, create one assembly of the J and the 7' and 11-touch parts of the τ' and lζ. At this time, apply N[+Δ between the -f tongue plate and the dummy plate 3, connect the 1 (C1 suction pin 6 to the vacuum pump,
Degree of vacuum inside the body 10' -1-o+・1・shido1
Thread, (to forge weld a part of the suction pipe 0,
1τ close.

c-(7) Union U type wo 85 (1'c "C' I If
;'t Ril 1111 Heat L' 1:, 7 to -0.5 + rolling ratio per pass, y-rolling ratio 5, ie, final plate thickness 1t, l ■ C' months.

Both j]: IJL status and 54 I)”C16
Heat treatment (1) was performed at 25° C., and the interfacial bonding strength in this state was tested.

The IIJ1 village is shown in Table 2.

The titanium clad steel using the intermediary welding method according to the present invention has a strong interfacial bonding force that is sufficient for 11 minutes to vortex the above-mentioned JIS standard 1 H1. According to the results of the analysis of the adhesive interface by Iku D.
Decarburization of the steel at the B/'6 Oka interface was also observed, confirming that the steel had a good bonding interface.

Actual Bar 11 Example 3 Titanium clad steel (2-1-o, IL-G) made by the exact same method as Example 2
()(nOm++ I- to 700nIIllVl/
Cut out X 20[)sl,
100mmWX 20 (1++mL S[3425
M plate, and 10IllllIt on the titanium side this month.
x 100m++W x 200m/L gentleman Bhutan (
JIS '1 type' was bonded by the Bakusenho 11 method.

After heating this titanium clad steel at 850°C for 1 hour, it was heated directly! Sea urchin hot J■ spread, final product Lees, 9.6
2 forceps 1 x 100m+n W x 1000u L
, made of titanium clad steel.

Regarding the physical properties of this titanium cucide steel - CI[6:j
, 1, state and state after heat treatment at 571tl '01625°C (tested!,,:Results are 1] 1).

The titanium clad steel of the intermediate medium welding material 1) is the same as the previous J IS)! A strong interfacial bonding force that satisfies the case 11n is obtained by Ulr 2 'i:
It was.

[Brief explanation of drawings]

Fig. 1, Fig. 2 [Explanatory diagram of the embodiment of Fig. 31
Figures 3 and 4 show other examples. [Rolling rolling, reduction f [This is J Grano showing the relationship between the rolling force and the rolling surface A force. 1...81 Month 2... Intermediate attachment 3...
3-...Titanium 4...Joint plate
5...Welding bead C)...Suction pie/7...
・Bundle number A8... Dummy board special W1 applicant Asahi Kasei-R Gyo Co., Ltd. Ne1 agent Patent attorney Hide Komatsu Gaku

Claims (1)

[Claims] (1) 1741 composite material made of titanium or titanium alloy and base material m4, niobium alloy, tantalum,
one of the tantalum alloys is interposed as an intermediate soot,
The joint surfaces of the steel plate and the intermediate soot-like steel plate are chemically cleaned (areally clean surfaces, avoiding the clean surfaces of each side closely, and welding the four circumferences to make one assembly. After that, the inside of the combined U-body is kept at a vacuum level of 1O-IT-orr or higher or a small atmosphere such as △r, and the combined μ-body is kept at a temperature of 700°C or higher. Wetting below 850'C 1
The method is to uniformly heat the product within a range of 30% and roll it to a rolling ratio of 2 or more. A method for producing titanium or titanium alloy clad steel sheets. +21 fJJ 114 plate was attached to the steel side, and titanium temporary was bonded to the composite material, or they were further heated for 11 hours and 1J.
A method for manufacturing a titanium clad steel sheet according to item 1.