Maraging steel article and method of manufacture
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[0035] Experiments were performed to determine various properties that were considered important to the successful performance of the alloy article of the invention. This included rapid strain tensile testing as a measure of hot workability, thermal fatigue cracking, temper resistance, tensile testing at room temperature and at 1000° F., determination of coefficient of thermal expansion and coating trials.
[0036] The following is the steel composition of the invention and H13 composition of the test specimens:
ElementMaraging AlloyESR H13C0.0190.40S0.0110.002Mn0.320.27Si0.271.05Cr4.925.46Mo7.871.22V0.91Co11.170.04Ni1.890.15P0.0150.009Al0.01NbTiW0.007O0.0110.0017N0.0230.005
Rapid Strain Tensile Test
[0037] The rapid strain tensile testing was performed using the alloy article of the invention produced by powder metallurgy and electro slag remelted material of the same composition. In rapid strain testing, the specimens were heated by direct resistance heating. After achieving and eq...
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