Corrosion resistant magnetic component for a fuel injection valve
View Patent ↗A magnetic component for a magnetically actuated fuel injection device is formed of a corrosion resistant soft magnetic alloy consisting essentially of, in weight percent, 9%<Co<20%, 6%<Cr<15%, 0%≦S≦0.5%, 0%≦Mn≦4.5%, 0%≦Al≦2.5%, 0%≦V≦2.0%, 0%≦Ti≦2.0%, 0%≦Mo≦2.0%, 0%≦Si≦3.5%, 0%≦C<0.05%, 0%≦P<0.1%, 0%≦N<0.5%, 0%≦O<0.05%, 0%≦B<0.01%, and the balance being essentially iron and having at least one of Al, V, Ti and Mo.
1. A magnetic component for a magnetically actuated fuel injection device, the magnetic component being formed of a corrosion resistant soft magnetic alloy consisting of, in weight percent, 9%<Co<20%, 11%≦Cr≦19%, 0%≦S≦0.5%, 0%≦Mn≦4.5%, 0.2%≦Al≦2.0%, 0%≦Si≦3.5%, 0%≦C<0.05%, 0%≦P<0.1%, 0%≦N<0.5%, 0%≦O<0.05%, 0%≦B<0.01%, V=0%, Ti=0%, Mo=0%, and the balance being iron and the usual impurities.
2. The magnetic component according to claim 1 , wherein the magnetic component is prepared by a process comprising the step of annealing at a temperature between 650° C. and 800° C.
3. The magnetic component according to claim 2 , wherein the magnetic component is prepared by a process comprising the step of annealing at a temperature of around 700° C. for five hours.
4. The magnetic component according to claim 1 , wherein 10.5%<Co<18.5%.
5. The magnetic component according to claim 1 , wherein 0.01%≦Mn≦1% and 0.005%≦S≦0.5%.
6. The magnetic component according to claim 1 , wherein 0.01%≦Mn≦0.1% and 0.005%≦S≦0.05%.
7. The magnetic component according to claim 1 , wherein the ratio Mn/S≧1.7.
8. The magnetic component according to claim 1 , wherein the fuel injection device is a direct fuel injection valve.
9. A magnetic component for a magnetically actuated fuel injection device, the magnetic component being formed of a corrosion resistant soft magnetic alloy consisting of, in weight percent, 0%<Co<20%, Cr=13%, V=0% and the balance being iron and the usual impurities and wherein the magnetic component is prepared by a process comprising the step of annealing at a temperature between 650° C. and 800° C.
10. The magnetic component according to claim 9 , wherein 6%<Co<16%.
11. The magnetic component according to claim 9 , wherein 10.5%<Co<18.5%.