Wear resistant sintered member

1. A wear resistant sintered member comprising:

an Fe base alloy matrix; and

a hard phase dispersed in the Fe base alloy matrix, wherein the hard phase has an alloy matrix and hard particles precipitated and dispersed in the alloy matrix;

wherein manganese sulfide particles having particle size of 10 μm or less are uniformly dispersed in crystal grains of the overall Fe base alloy matrix; and

manganese sulfide particles having particle size of 10 μm or less are dispersed in the alloy matrix of the hard phase.

2. The wear resistant sintered member according to claim 1 , wherein the wear resistant sintered member including 0.3 to 4.5 mass % of the manganese sulfide particles in the Fe base alloy matrix and the alloy matrix of the hard phase.

3. The wear resistant sintered member according to claim 1 , wherein the Fe base alloy matrix includes 0.2 to 3 mass % of Mn, and the hard phase includes 0.5 to 5 mass % of Mn.

4. The wear resistant sintered member according to claim 3 , wherein amount of Mn in the hard phase is larger than amount of Mn in the Fe base alloy matrix.

5. The wear resistant sintered member according to claim 1 , wherein the wear resistant sintered member includes 2 to 40 mass % of the hard phase dispersed in the Fe base alloy matrix.

6. The wear resistant sintered member according to claim 1 , wherein the Fe base alloy matrix has a structure composed of bainite.

7. The wear resistant sintered member according to claim 1 , wherein the alloy matrix is composed of Fe base alloy or Co base alloy, and the hard particles of the hard phase are composed of molybdenum silicide.

8. The wear resistant sintered member according to claim 1 , wherein the wear resistant sintered member is composed of a sintered alloy including: 0.23 to 4.39 mass % of Ni; 0.62 to 22.98 mass % of Mo; 0.05 to 2.93 mass % of Cr; 0.18 to 3.79 mass % of Mn; 0.01 to 4.0 mass % of Si; 0.04 to 5.0 mass % of S; 0.3 to 1.2 mass % of C; and the balance of Fe and inevitable impurities.

9. The wear resistant sintered member according to claim 1 , wherein the wear resistant sintered member is composed of a sintered alloy including: 0.23 to 4.39 mass % of Ni; 0.62 to 29.84 mass % of Mo; 0.05 to 2.93 mass % of Cr; 0.18 to 3.79 mass % of Mn; 0.01 to 4.0 mass % of Si; 0.04 to 5.0 mass % of S; 0.3 to 1.2 mass % of C; optionally including at least one element selected from a group consisting of 0.12 to 14.33 mass % of W; and 0.08 to 9.91 mass % of Cu; and the balance of Fe and inevitable impurities.

10. The wear resistant sintered member according to claim 1 , wherein the wear resistant sintered member is composed of a sintered alloy including: 0.7 to 35.6 mass % of Co; 0.23 to 4.39 mass % of Ni; 0.62 to 22.98 mass % of Mo; 0.05 to 2.93 mass % of Cr; 0.18 to 3.79 mass % of Mn; 0.01 to 4.0 mass % of Si; 0.04 to 5.0 mass % of S; 0.3 to 1.2 mass % of C; and the balance of Fe and inevitable impurities.

11. The wear resistant sintered member according to claim 1 , wherein the wear resistant sintered member is composed of a sintered alloy including: 0.7 to 35.6 mass % of Co; 0.23 to 4.39 mass % of Ni; 0.62 to 29.84 mass % of Mo; 0.05 to 2.93 mass % of Cr; 0.18 to 3.79 mass % of Mn; 0.01 to 4.0 mass % of Si; 0.04to 5.0 mass % of 5; 0.3 to 1.2 mass % of C; optionally including at least one element selected from a group consisting of 0.12 to 14.33 mass % of W; and 0.08 to 9.91 mass % of Cu; and the balance of Fe and inevitable impurities.

12. The wear resistant sintered member according to claim 1 , wherein the wear resistant sintered member is composed of a sintered alloy including: 0.22 to 4.39 mass % of Ni; 0.22 to 4.88 mass % of Mo; 0.16 to 11.79 mass % of Cr; 0.18 to 3.79 mass % of Mn; 0.04 to 5.0 mass % of S; 0.3 to 2.0 mass % of C; and the balance of Fe and inevitable impurities.

13. The wear resistant sintered member according to claim 1 , wherein the wear resistant sintered member is composed of a sintered alloy including 0.22 to 4.39 mass % of Ni; 0.22 to 5.00 mass % of Mo; 0.16 to 11.79 mass % of Cr; 0.18 to 3.79 mass % of Mn; 0.04 to 5.0 mass % of S; 0.3 to 2.0 mass % of C; optionally including at least one element selected from a group consisting of 0.004 to 0.88 mass % of V; and 0.02 to 2.0 mass % of W; and the balance of Fe and inevitable impurities.

14. The wear resistant sintered member according to claim 1 , wherein the wear resistant sintered member is composed of a sintered alloy including: 0.22 to 4.39 mass % of Ni; 0.22 to 11.74 mass % of Mo; 0.16 to 11.79 mass % of Cr; 0.18 to 3.79 mass % of Mn; 0.04 to 5.0 mass % of S; 0.3 to 2.0 mass % of C; optionally including at least one element selected from a group consisting of 0.12 to 14.33 mass % of W; and 0.08 to 9.91 mass % of Cu; and the balance of Fe and inevitable impurities.

15. The wear resistant sintered member according to claim 1 , wherein the wear resistant sintered member is composed of a sintered alloy including: 0.22 to 4.39 mass % of Ni; 0.22 to 4.88 mass % of Mo; 0.14 to 3.79 mass % of Cr; 0.18 to 3.79 mass % of Mn; 0.02 to 8.0 mass % of W; 0.01 to 2.4 mass % of V; 0.04 to 5.0 mass % of S; 0.3 to 2.0 mass % of C; and the balance of Fe and inevitable impurities.

16. The wear resistant sintered member according to claim 1 , wherein the wear resistant sintered member is composed of a sintered alloy including: 0.22 to 4.39 mass % of Ni; 0.22 to 12.88 mass % of Mo; 0.14 to 3.79 mass % of Cr; 0.18 to 3.79 mass % of Mn; 0.02 to 8.0 mass % of W; 0.01 to 2.4 mass % of V; 0.04 to 5.0 mass % of S; 0.3 to 2.0 mass % of C; optionally including not more than 8.0 mass % of Co and the balance of Fe and inevitable impurities.

17. The wear resistant sintered member according to claim 1 , wherein the wear resistant sintered member is composed of a sintered alloy including: 0.22 to 4.39 mass % of Ni; 0.22 to 11.74 mass % of Mo; 0.14 to 3.79 mass % of Cr; 0.18 to 3.79 mass % of Mn; 0.02to 8.0 mass % of W; 0.01 to 2.4 mass % of V; 0.04 to 5.0 mass % of S; 0.3 to 2.0 mass % of C; optionally including 0.08 to 9.91 mass % of Cu; and the balance of Fe and inevitable impurities.

18. The wear resistant sintered member according to claim 1 , wherein the wear resistant sintered member has pores and powder boundaries, and at least one selected from the group consisting of magnesium silicate mineral, boron nitride, manganese sulfide, calcium fluoride, bismuth, chrome sulfide, and lead is dispersed in the pores and the powder boundaries.

19. The wear resistant sintered member according to claim 1 , wherein the wear resistant sintered member has pores, and one selected from the group consisting of lead or lead alloy, copper or copper alloy, and aclylic resin is filled in the pores.