casting ball_Yantai Yitai Chemical Co., Ltd.

casting ball

Position:Home > Product > Steel Ball > casting ball

casting ball(图1)

Process Features of Casting Balls:

Chemical Composition Matching

The rational chemical composition is gradually optimized and formed by our technical staff after continuous tests.It is unique.The best configuration of various alloying elements can combine the ball’s hardness and toughness at their best.

Melting and pouring process

All casting iron balls are produced by intermediate frequency electric furnace.The purity and stability of materials are effectively ensured after uniform temperature conditioning and twice hot metal purification.

Temperature Control Process

The temperature control is an important and complex process during casting iron ball production.Different tapping temperature,pouring temperature,mold temperature and heat treatment temperature are sensitively reflected in the quality of products.It is required to master the proper pouring temperature,mold temperature,so that can make sure the products achieve a good state of body tissue during the transition from liquid to solid sates.

Moulding Process

Pouring when the molten iron temperature reaches 1500 degrees,using the temperature difference between molten iron and the molds.In the way,the ball an achieve internal organization of grain refinement and be more dense.Meanwhile, The Carbide is radially arranged and such Carbide is embedded in the matrix again during grinding process,forming hard layer continuously .So that the hardness and toughness is maintained to a reasonable range,greatly improving the toughness and hardness of the grinding balls.

Heat treatment process

We have two sets of the heat treatment production line.One is oil quenching,the other is air quenching.So that the grinding balls can be burning through and uenching through.And the grinding ball has the characters of high hardness,good toughness,low wear rate,low break rate,wear-resistant,etc through tempering.

Technical Parameters of Casting Balls

Type and Chemical Composition of Casting Balls

Name	Material	C	Mn	Si	Cr	S	p	Mo&Ni	Al&Cu	Microstructure
YT-7	Specialhi-CrⅠ	2.0-2.8	0.5-2.0	≤1.0	22-32	≤0.06	≤0.08	Trace	Trace	M+C
YT-8	Specialhi-CrⅡ	2.0-2.8	0.5-2.0	≤1.0	17-22	≤0.06	≤0.08	Trace	Trace	M+C
YT-9	Specialhi-CrⅢ	2.2-3.0	0.5-2.0	≤1.0	15-17	≤0.06	≤0.08	Trace	Trace	M+C
YT-10	High-Cr	2.2-3.2	0.5-1.5	≤1.0	10-14	≤0.06	≤0.08	Trace	Trace	M+C
YT-11	Medium-Cr	2.1-3.2	0.5-1.5	≤1.2	5-9	≤0.06	≤0.08	Trace	Trace	P+C
YT-12	Low-Cr	2.2-3.5	0.5-1.5	≤1.2	1-3	≤0.06	≤0.08	Trace	Trace	P+C

Physical Property of Casting Balls

Name	Material	Impact Test (AK.J/CM2)	Endurance test(times)	Hardness(HRC)				Breakage Rate
				Dia17mm-90mm		Dia100mm-130mm
				quenching	unquenching	quenching	unquenching
YT-7	Specialhi-CrⅠ	≥4	≥10000	≥60	≥49	≥60	≥48	<1%
YT-8	Specialhi-CrⅡ	≥4	≥10000	≥60	≥49	≥60	≥48	<1%
YT-9	Specialhi-CrⅢ	≥4	≥10000	≥60	≥49	≥59	≥48	<1%
YT-10	High-Cr	≥3	≥10000	≥60	≥49	≥58	≥48	<1%
YT-11	Medium-Cr	≥3	≥8000	-	≥48	-	≥48	<1%
YT-12	Low-Cr	≥2	≥8000	-	≥45	-	≥45	<1%

Weight of Casting Balls

Nominal diameter(mm)	Diametrical Tolerance(mm)	Approx weight per ball(kgs)	Average number per MT
20	+1,-0.5	0.033	30303
25	+1.5,-0.5	0.064	15625
30	+2.0,-1.0	0.11	9090
40	+2.0,-1.0	0.261	3831
50	+2.0,-1.0	0.510	1961
60	+2.0,-1.0	0.883	1132
70	+3.0,-1.5	1.402	713
80	+3.0,-1.5	2.092	478
90	+3.0,-1.5	2.98	335
100	+3.0,-1.5	4.087	244
110	+3.0,-1.5	5.44	183
120	+3.0,-1.5	7.062	141

Quality ControlOur products follows strictly with standard production process,the technicans supervise the process to record and control the key quality point.The quality of our products can meet the request from different countries and areas, and has got high reputation.Package and TransportationIn order to serve customers with timely delivery, we load the products to steel drums or containers bags timely after check. And then transport the goods by truck, vessel or air, to assure the goods arrive at customers’ dominated place with safety.