Maraging steel article and method of manufacture

A method for producing a maraging steel article, the method comprising:

• hot isostatic pressing a prealloyed steel powder to produce a fully dense article, the steel consisting of, in weight percent:
• 0.01 to 0.08 carbon;
• 0.10 to 1.00 manganese;
• 0.01 to 1.00 silicon;
• 2.50 to 6.00 chromium;
• 6.00 to 10.00 molybdenum;
• 1.00 to 4.00 nickel;
• 9.00 to 14.00 cobalt;
• 0.005 to less than 0.05 sulfur;
• balance iron and incidental elements and impurities;
• solution-annealing the fully dense article, wherein the solution annealing comprises heating the article at a temperature in the range of 1740° F. and 1925° F.;
• maraging the solution-annealed article, wherein the maraging comprises heating the article at a temperature in the range of 1050° F. and 1360° F., wherein the fully dense steel has a hardness of less than 40 HRC before the maraging and a hardness of greater than 45 HRC after the maraging;
• and
• applying at least one of a chemical vapor deposition coating and a physical vapor deposition coating to the fully dense article.

A method for producing a maraging steel article, the method comprising:

• hot isostatic pressing a prealloyed steel powder to produce a fully dense article, the steel consisting of, in weight percent:
• 0.01 to 0.08 carbon;
• 0.10 to1.00 manganese;
• 0.01 to1.00 silicon;
• 2.50 to 6.00 chromium;
• 6.00 to 10.00 molybdenum;
• 1.00 to 4.00 nickel;
• 9.00 to 14.00 cobalt;
• 0.005 to less than 0.05 sulfur;
• balance iron and incidental elements and impurities;
• solution-annealing the fully dense article by heating the article at a temperature between 1740° F. and 1925° F.;
• and
• maraging the solution-annealed article by heating the article at a temperature between 1050° F. and 1360° F., wherein the fully dense steel has a hardness of less than 40 HRC before the maraging and a hardness of greater than 45 HRC after the maraging.

A method for producing a maraging steel article, the method comprising:

• hot isostatic pressing a prealloyed steel powder to produce a fully dense article, the steel comprising, in weight percent:
• 0.01 to 0.08 carbon;
• 0.10 to 1.00 manganese;
• 0.01 to 1.00 silicon;
• 2.50 to 6.00 chromium;
• 6.00 to 0.00 molybdenum;
• 1.00 to 4.00 nickel;
• 9.00 to 14.00 cobalt;
• 0.005 to less than 0.05 sulfur;
• balance iron and incidental elements and impurities;
• solution-annealing the fully dense article, wherein the solution-annealing comprises heating the article at a temperature in the range of 1740° F. and 1925° F.;
• and
• maraging the solution-annealed article, wherein the maraging comprises heating the article at a temperature between 1050° F. and 1360° F., wherein the fully dense steel has a hardness of less than 40 HRC before the maraging and a hardness of greater than 45 HRC after the maraging.