Low-temperature surface nitriding method of titanium alloy
A titanium alloy and nitriding technology, which is applied to the surface treatment of titanium alloys and the field of low-temperature surface nitriding of titanium alloys, can solve problems that are rarely mentioned, and achieve the effects of enhanced wear resistance, simple process, and cost-effective
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preparation example Construction
[0047] 2. Preparation of nitriding reagent
[0048] The mixture of white powder crystal sodium cyanate (NaCNO) and white square granular crystal potassium cyanate (KCNO) (the mixing ratio of sodium cyanate (NaCNO) and potassium cyanate (KCNO) is (0.8~1) by mass: 1) with rare earth CeO 2 (particle size ≤ 200 mesh) powder is put into a ball mill and stirred for 15-20 minutes to obtain a nitriding reagent; the mass percentage of the mixture of sodium cyanate and potassium cyanate in the reagent is 80-98%, rare earth cerium oxide (CeO 2 ) The mass percentage is 2%~20%.
[0049] 3. Surface chemical heat treatment
[0050] First put part of the nitriding reagent into the pre-prepared corundum crucible for compaction, and then center and flatly place the surface-treated titanium alloy sample on the compacted nitriding reagent (the bottom of the crucible is supported by a 3-point support method). The sample is supported, arranged in an equilateral triangle, the distance from the su...
example 1
[0052] Step 1. Surface treatment of titanium alloy samples
[0053] 1) Sandblasting
[0054] White corundum (Al 2 o 3 ) (SiO 2 or SiC) sand particles to sandblast the titanium alloy surface, the working pressure is 0.5MPa, and the sandblasting time is 15 minutes.
[0055] 2) grinding
[0056] Put the titanium alloy sample after sandblasting in a low-temperature ultra-clean polishing machine, using Al 2 o 3 (Abrasive particle size is 20μm) Consolidated grinding and polishing pad (grinding pressure is 0.05MPa, eccentricity is 60mm, rotation speed is 120rpm, grinding time is 15 minutes), for rough grinding; after that, use Al 2 o 3 (Abrasive particle size is 14 μm) Consolidated grinding and polishing pad (grinding pressure is 0.025, eccentricity is 60mm, rotation speed is 180rpm, grinding time is 20 minutes) for fine grinding treatment.
[0057] 3) Polishing and cleaning
[0058] Put the ground titanium alloy sample in a low-temperature ultra-clean polishing machine, an...
example 2
[0065] Step 1. Surface treatment of titanium alloy samples
[0066] 1) Sandblasting
[0067] White corundum (Al 2 o 3 ) sand to blast the surface of the titanium alloy, the working pressure is 0.3MPa, and the blasting time is 10 minutes.
[0068] 2) grinding
[0069] Put the titanium alloy sample after sandblasting in a low-temperature ultra-clean polishing machine, using Al 2 o 3 (Abrasive particle size is 28μm) Consolidated grinding and polishing pad (grinding pressure is 0.075MPa, eccentricity is 70mm, rotation speed is 100rpm, grinding time is 15 minutes), for rough grinding; after that, use Al 2 o 3 (Abrasive particle size is 10 μm) Consolidated grinding and polishing pad (grinding pressure is 0.05, eccentricity is 70mm, rotation speed is 150rpm, grinding time is 30 minutes) for fine grinding treatment.
[0070] 3) Polishing and cleaning
[0071] Put the ground titanium alloy sample in a low-temperature ultra-clean polishing machine, and use a rare earth cerium ox...
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