Factory Gr12 welding titanium Pipe titanium alloy tube for industrial
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TA10 Grade 12(Ti-0.8Ni-0.3Mo) Titanium Welded Pipe For Chemical Equipment And Tanks A10 (Ti-0.3Mo-0.8Ni, titanium-molybdenum-nickel alloy) Titanium
alloy is a corrosion-resistant titanium alloy. The foreign similar
grade Gr.12 (US) is a near-α developed to improve the crevice
corrosion performance of pure titanium. Alloy, which contains 0.3%
Mo and 0.8% Ni, not only strengthens the alloy, but also has good
resistance to crevice corrosion to high temperature, low pH
chloride or weakly reducing acid, and its corrosion resistance is
significantly better than pure titanium And close to TA9 / Gr7
alloy. TA10 / Gr12 alloy also has good process plasticity and
welding properties, and has been widely used in chemical
manufacturing equipment and tanks. The alloy can be used in the
annealed state, and the main forms are sheet, rod, pipe, forging
and wire Wait.
Welding Properties of Titanium alloys At room temperature, titanium and titanium alloys are relatively
stable. Titanium and titanium alloys have many advantages as
structural materials, such as low specific gravity, high tensile
strength and high yield strength. They still have high enough
strength at 300 ~ 500 ° C. It has excellent corrosion resistance in
most media of acid and alkali salts, and it has been widely used in
aviation, chemical industry and nuclear industry.But as temperature rises, the ability of titanium and its alloys to
absorb hydrogen, oxygen, and nitrogen gradually rises. Titanium
absorbs hydrogen from 250 ° C, oxygen from 400 ° C, and nitrogen
from 600 ° C. Due to the high affinity of titanium alloys with O2,
N2, and H2, the joints containing these gases will make the joints
brittle, reducing the impact performance, plasticity and toughness
of titanium alloy welded joints. When titanium alloy contains
hydrogen, delayed cracks occur in the heat-affected zone. When the
weld contains high levels of oxygen and nitrogen, the weld or the
heat-affected zone will also have cracks under the effect of large
welding stresses, which are also delayed cracks. Therefore, inert
gas (or vacuum chamber) protection is very necessary. TIG welding :Because the cost of using a vacuum chamber is relatively high, an
inert gas protection method is generally used. The shielding gases
are mainly helium and argon. Because helium is more expensive than
argon, generally speaking, for high-purity argon gas to protect the
welding joints and heat-affected zones of titanium alloys that are
not particularly required, oxidation can be prevented. Welding process: manual TIG argon arc welding, automatic plasma argon arc welding Porosity problems in welds :Porosity is a common problem when welding titanium and titanium
alloys. The root cause of stomata is the result of the effects of
hydrogen. The formation of pores in the weld metal mainly affects
the fatigue strength of the joint. The main technological measures
to prevent pores are: (1) The protection of neon gas should be
pure, and the purity should not be less than 99.99% (2) Thoroughly
remove organic matters such as scale oil on the surface of the
welding piece and the surface of the welding wire. (3) Apply good
gas protection to the molten pool, control the flow and velocity of
argon gas, prevent turbulence, and affect the protection effect.
(4) Correctly select the welding process parameters, increase the
use of the deep pool residence time and the right to use the
bubbles to escape, which can effectively reduce the pores. FAQ 7. What is your company's response to the product in question? 1) Verify and blame for pre-sales communication issues. Compensation is handled according to the proportion of liability. 2) We are 100% responsible for problems caused by damaged packaging
during transportation. |
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