DZ4

HuaNickel DZ4 is a nickel-based precipitation hardening directional solidification columnar crystal superalloy, which is a high-strength oxidation resistant alloy with a service temperature below 1050°C. The alloy has good comprehensive properties and castability. The not(γ+γ) eutectic phase in the alloy structure has a high initial melting point. The main products are gas turbine engines, turbine working blades and guide vanes and other high-temperature parts.

DZ4Chemical composition：

	Ni	Cr	C	W	Mo	AI	Ti	B	Fe	Zr	Mn	Si	P	S	Pb	Sn
Min	Bal	9	1	5.1	3.5	5.6	1.6	0.012	≤
Max		10	1.6	5.8	4.2	6.4	2.2	0.025	1	0.02	0.5	0.5	0.02	0.01	0.001	0.002

DZ4Physical properties：

Density	8.15g/cm³
Melting point	1310℃~1365℃
Magnetic properties	not

Coefficient of linear expansion

θ/℃		20～108	20～208	20～298	20～400	20～498	20～603	20～704	20～798	20～907	20～951
α/(10-6℃-1)	Longitudinal	9.17	10.68	11.48	12.22	12.81	13.07	13.53	14.09	14.81	15.20
	45°	7.92	9.95	11.03	11.83	12.48	12.94	13.26	14.65	14.62	15.04
	Transverse	8.38	10.57	11.52	12.28	12.80	13.11	13.57	14.08	14.77	15.11

Resilient performance

θ/℃	In the following orientations，Ed/GPa				θ/℃	In the following orientations，Ed/GPa				θ/℃	In the following orientations，Ed/GPa
	0°	30°	45°	90°		0°	30°	45°	90°		0°	30°	45°	90°
20	128	197	256	181	400	116	180	238	157	820	99	157	205	137
100	125	195	254	171	500	113	176	234	152	900	92	147	197	128
200	122	190	249	169	600	109	170	231	147	1000	84	137	186	122
300	119	186	245	163	720	105	164	215	141		—

DZ4Mechanical properties：

Standard number	variety	Sampling	sampleState	Tensile properties				Long-lasting performance
				θ/℃	σb/MPa	δ₅/%	ψ/%	θ/℃	σ/MPa	τ/h
HB 7762	Master alloy	Directional solidification test sticks  Longitudinal	Columnar crystals+Standard heat treatment	900	≥735	≥6.0	≥8.0	900	315	≥100
								950	235	≥55
		Precision casting test rodsLongitudinal	Equiaxed crystals Cast state	800	≥785	≥2.0	≥3.0	975	195	≥30
Q/3B 475	blade	Directional solidification test sticks  Longitudinal	Columnar crystals十Standardheattreatment	900	≥735	≥6.0	≥8.0	950	235	≥55
								760	690	≥100

DZ4Alloy properties：

DZ4 alloy has excellent casting performance, and can be cast into net-shaped directional solidified column crystal blades and thin-walled hollow parts with complex inner cavities with wall thickness as small as 0.5mm, without cracking.

DZ4Uses of alloys：

HuaNickel DZ4 alloy has been used in the manufacture of turbine working blades and guide vanes for aero engines. The alloy is suitable for making gas turbine rotor blades working below 1000°C and guide vanes working below 1050°C.

DZ4Application field process performance：

Welding process: Vacuum brazing is possible.

Parts heat treatment: notBal blade heat treatment needs to be carried out under vacuum or protective atmosphere: 1220°C±10°C×4h/AC+870°C±10°C×32h/AC.

Relevant standards：

GB/T  14992、HB 7569 、HB 7728、HB 7762、HB/Z140 、Q/3B475